VCEEncC option list

August 12, 2026 · View on GitHub

Command line example
- Basic commands
- More practical commands
Option format
Display options
Basic encoding options
Encode Mode Options
Other Options for Encoder
IO / Audio / Subtitle Options
Vpp Options
Other Options

Command line example

Basic commands

VCEEncC.exe [Options] -i <filename> -o <filename>

More practical commands

example of using hw decoder

VCEEncC --avhw -i "<mp4(H.264/AVC) file>" -o "<outfilename.264>"

example of using hw decoder (interlaced)

VCEEncC --avhw --interlace tff -i "<mp4(H.264/AVC) file>" -o "<outfilename.264>"

avs (Avisynth) example (avs and vpy can also be read via vfw)

VCEEncC -i "<avsfile>" -o "<outfilename.264>"

example of pipe usage

avs2pipemod -y4mp "<avsfile>" | VCEEncC --y4m -i - -o "<outfilename.264>"

pipe usage from ffmpeg

ffmpeg -y -i "<inputfile>" -an -pix_fmt yuv420p -f yuv4mpegpipe - | VCEEncC --y4m -i - -o "<outfilename.264>"

Passing video & audio from ffmpeg

--> use "nut" to pass both video & audio through pipe.

ffmpeg -y -i "<input>" <options for ffmpeg> -codec:a copy -codec:v rawvideo -pix_fmt yuv420p -f nut - | VCEEncC --avsw -i - --audio-codec aac -o "<outfilename.mp4>"

Passing filtered results & audio to ffmpeg

--> use "nut" to pass both video & audio through pipe.

VCEEncC -i "<input>" <filter options> --audio-copy -c raw --output-format nut -o - | ffmpeg -y -f nut -i - <encode options for ffmpeg> -o output.mp4

Copy all tracks and metadata during video encode

VCEEncC -i "<input>" <encode options> --colormatrix auto --transfer auto --colorprim auto --chromaloc auto --max-cll copy --master-display copy --dhdr10-info copy --dolby-vision-rpu copy --video-metadata copy --audio-copy --audio-metadata copy  --sub-copy --sub-metadata copy --data-copy --attachment-copy --chapter-copy -o output.mkv

Option format

-<short option name>, --<option name> <argument>

The argument type is
- none
- <int>    ... use integer
- <float>  ... use decimal point
- <string> ... use character string

The argument with [ ] { } brackets are optional.
"..." means repeat of previous block.

--(no-)xxx
If it is attached with --no-xxx, you get the opposite effect of --xxx.
Example 1: --xxx: enable xxx → --no-xxx: disable xxx
Example 2: --xxx: disable xxx → --no-xxx: enable xxx

Display options

--check-hw [<int>]

Check whether the specified device is able to run VCEEnc. DeviceID: "0" will be checked if not specified.

--check-features [<int>]

Show the information of features of the specified device. DeviceID: "0" will be checked if not specified.

--check-codecs, --check-decoders, --check-encoders

Show available audio codec names

--check-profiles <string>

Show profile names available for specified codec

--check-avdevices

Show available devices (from libavdevice)

Basic encoding options

-d, --device <int>

Specify the deviceId to be used with VCEEnc.

-c, --codec <string>

Specify the output codec

h264 (default)
hevc
av1
raw
av_xxx (to use avcodec encoder)

When using avcodec encoders (av_xxx format), you can check available encoders with --check-encoders option. In this case parameters can be set only by --avcodec-prms option.

-c raw will not encode and output raw frames.

-o, --output <string>

Set output file name, pipe output with "-"

-i, --input <string>

Set input file name, pipe input with "-"

Table below shows the supported readers of VCEEnc. When input format is not set, reader used will be selected depending on the extension of input file.

Auto selection of reader

reader	target extension
Avisynth reader	avs
VapourSynth reader	vpy
avi reader	avi
y4m reader	y4m
raw reader	yuv
avhw/avsw reader	others

color format supported by reader

reader	yuv420	yuy2	yuv422	yuv444
raw	◎		◎	◎
y4m	◎		◎	◎
avi	○	○
avs	◎	○	◎	◎
vpy	◎		◎	◎
avhw	□
avsw	◎		◎	◎

◎ ... 8bit / 9bit / 10bit / 12bit / 14bit / 16bit supported
◇ ... 8bit / 10bit / 12bit supported
□ ... 8bit / 10bit supported
○ ... support only 8 bits

--raw

Set the input to raw format. input resolution & input fps must also be set.

--avs

Read Avisynth script file using avs reader.

VCEEncC works on UTF-8 mode as default, so the Avisynth script is required to be also in UTF-8 when using non ASCII characters. When using scripts in the default codepage of the OS, such as ANSI, you will need to add "--process-codepage os" option to change VCEEncC also work on the default codepage of the OS.

--vpy

--vpy-mt

Read VapourSynth script file using vpy reader.

--avsw [<string>]

Read input file using avformat + libavcodec's sw decoder. The optional parameter will set decoder name to be used, otherwise decoder will be selected automatically.

--avhw

Read input file using avformat + QSV hw decoder. Using this mode will provide maximum performance, since entire transcode process will be run on the GPU.

Codecs supported by avhw reader

Codecs	Status
MPEG1	×
MPEG2	○
H.264/AVC	○
H.265/HEVC	○
VP8	×
VP9	○
VC-1	○
WMV3/WMV9	×

○ ... supported
× ... no support

--interlace <string>

Set interlace flag of input frame.

Parameters
- none ... progressive
- tff ... top field first
- bff ... Bottom Field First
- auto ... auto detect when possible

--video-track <int>

Set video track to encode in track id. Will be active when used with avhw/avsw reader.

1 (default) highest resolution video track
2 next high resolution video track ...
-1 lowest resolution video track
-2 next low resolution video track ...

--crop <int>,<int>,<int>,<int>

Number of pixels to cropped from left, top, right, bottom.

--frames <int>

Number of frames to input. (Note: input base, not output base)

--fps <int>/<int> or <float>

Set the input frame rate when --raw is used. Not recommended to be used with readers other than --raw.

Only valid for raw format (when --raw is used), otherwise it will be ignored or only treated as a hint.

--input-res <int>x<int>

Set input resolution. Required for raw format.

--output-res <int>x<int>

Set output resolution. When it is different from the input resolution, HW/GPU resizer will be activated automatically.

If not specified, it will be same as the input resolution. (no resize)

Special Values
- 0 ... Will be same as input.
- One of width or height as negative value
  Will be resized keeping aspect ratio, and a value which could be divided by the negative value will be chosen.
parameters
- preserve_aspect_ratio=<string>
 Resize to specified width or height, while preserving input aspect ratio.
 - increase ... preserve aspect ratio by increasing resolution.
 - decrease ... preserve aspect ratio by decreasing resolution.
- ignore_sar=<bool>
 When auto resizing with negative value, ignore in/out SAR ratio in calculation. Default = off.

Example

When input is 1280x720...
--output-res 1024x576 -> normal
--output-res 960x0    -> resize to 960x720 (0 will be replaced to 720, same as input)
--output-res 1920x-2  -> resize to 1920x1080 (calculated to keep aspect ratio)

--output-res 1440x1440,preserve_aspect_ratio=increase -> resize to 2560x1440
--output-res 1440x1440,preserve_aspect_ratio=decrease -> resize to 1440x810

--input-csp <string>

Set input colorspace for --raw input. Default is yv12.

  yv12, nv12, p010, yuv420p9le, yuv420p10le, yuv420p12le, yuv420p14le, yuv420p16le
  yuv422p, yuv422p9le, yuv422p10le, yuv422p12le, yuv422p14le, yuv422p16le
  yuv444p, yuv444p9le, yuv444p10le, yuv444p12le, yuv444p14le, yuv444p16le

Encode Mode Options

The default is CQP (Constant quantization).

--cqp <int> or <int>:<int>:<int>

Set the QP value of ::

Generally, it is recommended to set the QP value to be I < P < B.

--cbr <int>

--cbrhq <int> [H.264/AV1]

--vbr <int>

--vbrhq <int> [H.264/AV1]

--qvbr <int> [H.264/AV1]

Set quality level (0-51) for QVBR mode (Quality based VBR).

--qvbr <x> is short of --vbr 0 --qvbr-quality <x>.

Other Options for Encoder

-u, --preset

Encode qulaity preset.

balanced
fast
slow
slower

--output-depth <int>

Set output bit depth.

8 ... 8 bits (default)
10 ... 10 bits

--max-bitrate <int>

Maximum bitrate (in kbps).

--vbv-bufsize <int>

Size of VBV buffer size (in kb, default auto). Max possible is 500000.

--qp-min <int> or <int>:<int>:<int>

Set the minimum QP value with ::. This option will be ignored in CQP mode.

It could be used to suppress bitrate being used unnecessarily to a portion of movie with still image.

--qp-max <int> or <int>:<int>:<int>

Set the maximum QP value to ::. This option will be ignored in CQP mode.

It could be used to maintain certain degree of image quality in any part of the video, even if doing so may exceed the specified bitrate.

--qvbr-quality <int>

Set quality level (0-51) for QVBR mode (Quality based VBR).

--gop-len <int>

Set maximum GOP length. When lookahead is off, this value will always be used. (Not variable, fixed GOP)

-b, --bframes <int>

Set the number of consecutive B frames.

--b-pyramid

Enable b-pyramid feature. (Default: auto)

--b-deltaqp <int>

Set qp offset for non-ref b frames. (Default: auto)

--bref-deltaqp <int>

Set qp offset for ref b frames. (Default: auto)

--adapt-minigop [H.264/AV1]

Enable adaptive mini-gop. This also enables --pa in AV1 encoding. (Default: auto)

--ref <int>

Set the reference distance. In hw encoding, incresing ref frames will have minor effect on image quality or compression rate. (Default: auto)

--ltr <int> [H.264/HEVC]

Set the long term reference mode. (Default: auto)

--vbaq [H.264/HEVC]

Enable adaptive quantization in frame. (Default: auto)

--skip-frame [H.264/HEVC]

Enable skip frame feature. (Default: off)

--enforce-hrd

Enforce hrd compatibility of bitstream.

--filler

Output filler data to adjust nominal bitrate.

--aud

Insert access unit delimiters in the output stream.

--repeat-headers

Repeat parameter sets (SPS/PPS for H.264, VPS/SPS/PPS for HEVC) in the output stream. This is automatically enabled when using HDR metadata options like --max-cll, --master-display, etc.

--no-deblock [H.264/HEVC]

Disable deblock filter.

--motion-est <string> [H.264/HEVC]

Motion vector accuracy / default: auto

auto ... automatic
q-pel ... 1/4 pixel accuracy (high precision)
half-pel ... 1/2 pixel precision
full-pel ... 1 pixel accuracy (low accuracy)

--tiles <int> [AV1]

Set number of tiles per frame.

--cdef-mode <string> [AV1]

Cdef mode.(default: auto)

params
- on
- off

--screen-content-tools [<param1>=<value1>[,<param2>=<value2>]...]

Set screen content tools. (default: auto)

params
- palette-mode=<bool>
 enable palette mode
- force-integer-mv=<bool>
 enable force integer MV

example

--screen-content-tools palette-mode=on,force-integer-mv=on

--cdf-update [AV1]

Enable CDF update. (default: auto)

--cdf-frame-end-update [AV1]

Enable CDF frame end update. (default: auto)

--temporal-layers <int> [HEVC/AV1]

Number of temporal layers.

--aq-mode <string> [AV1]

params
- none
- caq

--pe

Enable pre-encode assisted rate control. (default: off)

--pa [<param1>=<value1>[,<param2>=<value2>]...]

Enable pre analysis to enahance quality, supports VBR mode only. (default: off)

params
- sc=<string>
 Sensitivity of scene change detection
 - none
 - low
 - medium (default)
 - high
- ss=<string>
 Sensitivity of static scene detection
 - none
 - low
 - medium
 - high (default)
- activity-type=<string>
 Block activity calcualtion mode
 - y (default)
 - yuv
- caq-strength=<string>
 Content Adaptive Quantization (CAQ) strength
 - low
 - medium (default)
 - high
- initqpsc=<int>
 Initial qp after scene change (default: -1 = auto)
- fskip-maxqp=<int>
 Threshold to insert skip frame on static scene. (default: 35)
- lookahead=<int>
 Lookahead buffer size.
- ltr=<bool>
 enable automatic LTR frame management
- paq=<string>
 Perceptual AQ mode
 - none
 - caq
- taq=<int>
 Temporal AQ mode
 - 0
 - 1
 - 2
- motion-quality=<string>
 High motion quality boost mode
 - none
 - auto

example

--pa sc=high,ss=high,activity-type=yuv,paq=caq,taq=on,lookahead=32

--slices <int> [H.264/HEVC]

Set number of slices.

--level <string>

Specify the Level of the codec to be encoded. If not specified, it will be automatically set.

h264: auto, 1, 1 b, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1, 4.2, 5, 5.1, 5.2
hevc: auto, 1, 2, 2.1, 3, 3.1, 4, 4.1, 5, 5.1, 5.2, 6, 6.1, 6.2
av1 :  auto, 2, 2.1, 2.2, 2.3, 3, 3.1, 3.2, 3.3, 4, 4.1, 4.2, 4.3, 5, 5.1, 5.2, 5.3, 6, 6.1, 6.2, 6.3, 7, 7.1, 7.2, 7.3

--profile <string>

Specify the profile of the codec to be encoded. If not specified, it will be automatically set.

h264:  auto, baseline, main, high, high444
hevc:  auto, main, main10, main444
av1 :  auto, main

--tier <string> [HEVC only]

Specify the tier of the codec.

hevc:  main, high

--sar <int>:<int>

Set SAR ratio (pixel aspect ratio).

--dar <int>:<int>

Set DAR ratio (screen aspect ratio).

--colorrange <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  limited, full, auto

--videoformat <string>

  undef, ntsc, component, pal, secam, mac

--colormatrix <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  undef, auto, bt709, smpte170m, bt470bg, smpte240m, YCgCo, fcc, GBR, bt2020nc, bt2020c

--colorprim <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  undef, auto, bt709, smpte170m, bt470m, bt470bg, smpte240m, film, bt2020

--transfer <string>

"auto" will copy characteristic from input file (available when using avhw/avsw reader).

  undef, auto, bt709, smpte170m, bt470m, bt470bg, smpte240m, linear,
  log100, log316, iec61966-2-4, bt1361e, iec61966-2-1,
  bt2020-10, bt2020-12, smpte2084, smpte428, arib-std-b67

--chromaloc <int> or "auto"

Set chroma location flag of the output bitstream from values 0 ... 5.
"auto" will copy from input file (available when using avhw/avsw reader) default: 0 = unspecified

--max-cll <int>,<int> or "copy" [HEVC, AV1]

Set MaxCLL and MaxFall in nits. "copy" will copy values from the input file. (available when using avhw/avsw reader)

Please note that this option will implicitly activate --repeat-headers.

Example1: --max-cll 1000,300
Example2: --max-cll copy  # copy values from source

--master-display <string> or "copy" [HEVC, AV1]

Set Mastering display data. "copy" will copy values from the input file. (available when using avhw/avsw reader)

Please note that this option will implicitly activate --repeat-headers.

Example1: --master-display G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1)
Example2: --master-display copy  # copy values from source

--atc-sei <string> or <int> [HEVC only]

Set alternative transfer characteristics SEI from below or by integer, Required for HLG (Hybrid Log Gamma) signaling.

  undef, auto, bt709, smpte170m, bt470m, bt470bg, smpte240m, linear,
  log100, log316, iec61966-2-4, bt1361e, iec61966-2-1,
  bt2020-10, bt2020-12, smpte2084, smpte428, arib-std-b67

--dhdr10-info <string> [HEVC, AV1]

Apply HDR10+ dynamic metadata from specified json file. Requires hdr10plus_gen.exe module additionally.

--dhdr10-info copy [HEVC, AV1]

Copy HDR10+ dynamic metadata from input file.
Limitations for avhw reader: this option uses timestamps to reorder frames to decoded order to presentation order. Therefore, input files without timestamps (such as raw ES), are not supported. Please try for avsw reader for that case.

--dolby-vision-profile <string> [HEVC, AV1]

Output file which is specified in Dolby Vision profile. Recommended to be used with --dolby-vision-rpu.

For HEVC Dolby Vision output, this automatically applies Dolby Vision VUI settings and enables --repeat-headers, --aud and --enforce-hrd.

"copy" will use dolby vision profile from input file (available when using avhw/avsw reader).

unset, copy, 5.0, 8.1, 8.2, 8.4, 10.0, 10.1, 10.2, 10.4

--dolby-vision-rpu <string> [HEVC, AV1]

Interleave Dolby Vision RPU metadata from the specified file into the output file. Recommended to be used with --dolby-vision-profile.

Current Dolby Vision output is BL+RPU only. BL+EL output is not supported.

To better satisfy Dolby Vision profile/level bitrate and HRD limits, use bitrate/VBV-controlled modes and set --max-bitrate / --vbv-bufsize appropriately. --cqp can also be used, but it does not enforce those limits by itself.

--dolby-vision-rpu copy [HEVC, AV1]

Interleave Dolby Vision RPU metadata copied from HEVC input file. Recommended to be used with --dolby-vision-profile.

Limitations for avhw reader: this option uses timestamps to reorder frames to decoded order to presentation order. Therefore, input files without timestamps (such as raw ES), are not supported. Please try for avsw reader for that case.

--dolby-vision-rpu-prm <param1>=<value1>[,<param2>=<value2>]...

Set parameters for --dolby-vision-rpu.

parameters
- crop=<bool>
 Set active area offsets to 0 (no letterbox bars).

Examples

Example:  --dolby-vision-rpu-prm crop=true

--ssim

Calculate ssim of the encoded video.

--psnr

Calculate psnr of the encoded video.

--smart-access-video

Enables smart access video feature.

--multi-instance [HEVC/AV1]

Enables multi instance encode.

IO / Audio / Subtitle Options

--input-analyze <float>

Specify the length in seconds that libav parses for file analysis. The default is 5 (sec). If audio / subtitle tracks etc. are not detected properly, try increasing this value (eg 60).

--input-probesize <int>

Set the maximum size in bytes that libav parses for file analysis.

--trim <int>:<int>[,<int>:<int>][,<int>:<int>]...

Encode only frames in the specified range.

Examples

Example 1: --trim 0:1000,2000:3000    (encode from frame #0 to #1000 and from frame #2000 to #3000)
Example 2: --trim 2000:0              (encode from frame #2000 to the end)

--seek [<int>:][<int>:]<int>[.<int>]

The format is hh:mm:ss.ms. "hh" or "mm" could be omitted. The transcode will start from the time specified.

Seeking by this option is not exact but fast, compared to --trim. If you require exact seek, use --trim.

Examples

Example 1: --seek 0:01:15.400
Example 2: --seek 1:15.4
Example 3: --seek 75.4

--seekto [<int>:][<int>:]<int>[.<int>]

The format is hh:mm:ss.ms. "hh" or "mm" could be omitted.

Set encode finish time. This might be inaccurate, so if you require exact number of frames to encode, use --trim.

Examples

Example 1: --seekto 0:01:15.400
Example 2: --seekto 1:15.4
Example 3: --seekto 75.4

--input-format <string>

Specify input format for avhw / avsw reader.

-f, --output-format <string>

Specify output format for muxer.

Since the output format is automatically determined by the output extension, it is usually not necessary to specify it, but you can force the output format with this option.

Available formats can be checked with --check-formats. To output H.264 / HEVC as an Elementary Stream, specify "raw".

--video-track <int>

Set video track to encode by resolution. Will be active when used with avhw/avsw reader.

1 (default) highest resolution video track
2 next high resolution video track ...
-1 lowest resolution video track
-2 next low resolution video track ...

--video-streamid <int>

Set video track to encode in stream id.

--video-tag <string>

Specify video tag.

Examples
```
 -o test.mp4 -c hevc --video-tag hvc1
```

--video-metadata <string> or <string>=<string>

Set metadata for video track.

copy ... copy metadata from input if possible
clear ... do not copy metadata (default)

Examples

Example1: copy metadata from input file
--video-metadata 1?copy

Example2: clear metadata from input file
--video-metadata 1?clear

Example3: set metadata
--video-metadata 1?title="video title" --video-metadata 1?language=jpn

--avcodec-prms <string>

Set parameters for avcodec video encoder in key=value format, separated by commas. This option is only available when avcodec encoder is enabled by specifying -c av_xxx (e.g., -c av_libsvtav1, -c av_libvvenc, -c av_libvpx-vp9).

Examples

Example1: Set preset and CRF for libsvtav1
-c av_libsvtav1 --avcodec-prms "preset=6,crf=30,svtav1-params=enable-variance-boost=1:variance-boost-strength=2"

Example2: Set quality and threads for libvvenc
-c av_libvvenc --avcodec-prms qp=28,preset=medium,threads=4

Example3: Set parameters for libvpx-vp9
-c av_libvpx-vp9 --avcodec-prms crf=30,b=0,cpu-used=2

--audio-copy [<int/string>;[,<int/string>]...]

Copy audio track into output file. Available only when avhw / avsw reader is used.

If it does not work well, try encoding with --audio-codec, which is more stable.

You can also specify the audio track (1, 2, ...) to extract with [<int>], or select audio track to copy by language with [<string>]. Prefix languages with ! to select all tracks except those languages (for example, !eng,!jpn).

Examples

Example: Copy all audio tracks
--audio-copy

Example: Extract track numbers #1 and #2
--audio-copy 1,2

例: Extract audio tracks marked as English and Japanese
--audio-copy eng,jpn

--audio-codec [[<int/string>?]<string>[:<string>=<string>[,<string>=<string>]...]...]

Encode audio track with the codec specified. If codec is not set, most suitable codec will be selected automatically. Codecs available could be checked with --check-encoders.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>]. Prefix languages with ! to select all tracks except those languages (for example, --audio-codec !eng,!jpn?copy).

Also, after ":" you can specify params for audio encoder, after "#" you can specify params for audio decoder.

Examples

Example 1: encode all audio tracks to mp3
--audio-codec libmp3lame

Example 2: encode the 2nd track of audio to aac
--audio-codec 2?aac

Example 3: encode the English audio track to aac
--audio-codec eng?aac

Example 4: encode the English audio track and Japanese audio track to aac
--audio-codec eng?aac --audio-codec jpn?aac

Example 5: set param "aac_coder" to "twoloop" which will improve quality at low bitrate for aac encoder
--audio-codec aac:aac_coder=twoloop

--audio-encode-other-codec-only

When used together with --audio-codec, if the input audio codec equals the codec specified by --audio-codec, the audio will be copied (--audio-copy). Encoding will be performed only when the codec differs.

Examples

Example: Copy when input is AAC, otherwise encode to AAC
--audio-codec aac --audio-encode-other-codec-only

--audio-bitrate [<int/string>?]<int>

Specify the bitrate in kbps when encoding audio.

You can select audio track (1, 2, ...) to encode with [<int>] before ?, or select audio track to encode by language with [<string>] before ?.

You can set different bitrate to different audio channels, by using [<string>] after ?, using symbols below.

mono, stereo, 2.1, 3.0, 3.0(back), 3.1, 4.0, quad, quad(side), 5.0, 5.1, 6.0, 6.0(front), hexagonal, 6.1, 6.1(front), 7.0, 7.0(front), 7.1, 7.1(wide)

Examples

Example 1: --audio-bitrate 192 (set bitrate of audio track to 192 kbps)
Example 2: --audio-bitrate 1?320 --audio-bitrate 2?256 (set bitrate of 1st audio track to to 320 kbps, 2nd audio track   to to 256 kbps)
Example 3: --audio-bitrate stereo:256,5.1:640 (stereoを256kbpsで、5.1chを640kbpsで変換)

--audio-quality [<int/string>?]<int>

Specify the quality when encoding audio. The value depends on the codec used.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

--audio-profile [<int/string>?]<string>

Specify audio codec profile when encoding audio.You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

--audio-stream [<int/string>?]{<string1>}[:<string2>]

Separate or merge audio channels. Audio tracks specified with this option will always be encoded. (no copying available)

By comma(",") separation, you can generate multiple tracks from the same input track.

format

Specify the track to be processed by <int>.

Specify the channel to be used as input by <string1>. If omitted, input will be all the input channels.

Specify the output channel format by <string2>. If omitted, all the channels of <string1> will be used.

Examples

Example 1: --audio-stream FR,FL
Separate left and right channels of "dual mono" audio track, into two mono audio tracks.

Example 2: --audio-stream :stereo
Convert any audio track to stereo.

Example 3: --audio-stream 2?5.1,5.1:stereo
While encoding the 2nd 5.1 ch audio track of the input file as 5.1 ch,
another stereo downmixed audio track will be generated
from the same source audio track.

Available symbols

mono       = FC
stereo     = FL + FR
2.1        = FL + FR + LFE
3.0        = FL + FR + FC
3.0(back)  = FL + FR + BC
3.1        = FL + FR + FC + LFE
4.0        = FL + FR
4.0        = FL + FR + FC + BC
quad       = FL + FR + BL + BR
quad(side) = FL + FR + SL + SR
5.0        = FL + FR + FC + SL + SR
5.1        = FL + FR + FC + LFE + SL + SR
6.0        = FL + FR + FC + BC + SL + SR
6.0(front) = FL + FR + FLC + FRC + SL + SR
hexagonal  = FL + FR + FC + BL + BR + BC
6.1        = FL + FR + FC + LFE + BC + SL + SR
6.1(front) = FL + FR + LFE + FLC + FRC + SL + SR
7.0        = FL + FR + FC + BL + BR + SL + SR
7.0(front) = FL + FR + FC + FLC + FRC + SL + SR
7.1        = FL + FR + FC + LFE + BL + BR + SL + SR
7.1(wide)  = FL + FR + FC + LFE + FLC + FRC + SL + SR

--audio-samplerate [<int/string>?]<int>

Specify the sampling frequency of the sound in Hz. You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string&gt].

Examples

Example 1: --audio-bitrate 44100 (converting sound to 44100 Hz)
Example 2: --audio-bitrate 2?22050 (Convert the second track of voice to 22050 Hz)

--audio-resampler <string>

Specify the engine used for mixing audio channels and sampling frequency conversion.

swr ... swresampler (default)
soxr ... sox resampler (libsoxr)

--audio-delay [<int/string>?]<float>

Specify audio delay in milli seconds.　You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

--audio-file [<int/string>?][<string>]<string>

Extract audio track to the specified path. The output format is determined automatically from the output extension. Available only when avhw / avsw reader is used.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string&gt].

Examples

Example: extract audio track number #2 to test_out2.aac
--audio-file 2?"test_out2.aac"

[<string>] allows you to specify the output format.

Examples

Example: Output in adts format without extension
--audio-file 2?adts:"test_out2"

--audio-filter [<int/string>?]<string>

Apply filters to audio track. Filters could be slected from link.

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

Examples

Example 1: --audio-filter volume=0.2  (lowering the volume)
Example 2: --audio-filter 2?volume=-4db (lowering the volume of the 2nd track)

--audio-disposition [<int/string>?]<string>[,<string>][]...

set disposition for the specified audio track. You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

list of dispositions

default
dub
original
comment
lyrics
karaoke
forced
hearing_impaired
visual_impaired
clean_effects
attached_pic
captions
descriptions
dependent
metadata
copy

Examples

Example:
--audio-disposition 2?default,forced

--audio-metadata [<int/string>?]<string> or [<int/string>?]<string>=<string>

Set metadata for audio track.

copy ... copy metadata from input if possible (default)
clear ... do not copy metadata

You can select audio track (1, 2, ...) to encode with [<int>], or select audio track to encode by language with [<string>].

Examples

Example1: copy metadata from input file
--audio-metadata 1?copy

Example2: clear metadata from input file
--audio-metadata 1?clear

Example3: set metadata
--audio-metadata 1?title="audio title" --audio-metadata 1?language=jpn

--audio-bsf [<int/string>?]<string>

Apply bitstream filter to audio track.

--audio-ignore-decode-error <int>

Ignore the consecutive audio decode error, and continue transcoding within the threshold specified. The portion of audio which could not be decoded properly will be replaced with silence.

The default is 10.

Examples

Example1: Quit transcoding for a 5 consecutive audio decode error.
--audio-ignore-decode-error 5

Example2: Quit transcoding for a single audio decode error.
--audio-ignore-decode-error 0

--audio-source <string>[:{<int>?}[;<param1>=<value1>...]/[]...]

Mux an external audio file specified.

file params
- format=<string>
 Specify input format for the file.
- input_opt=<string>
 Specify input options for the file.
track params
- copy
 Copy audio track.
- codec=<string>
 Encode audio to specified audio codec.
- profile=<string>
 Specify audio codec profile when encoding audio.
- bitrate=<int>
 Specify audio bitrate in kbps.
- samplerate=<int>
 Specify audio sampling rate.
- delay=<int>
 Set audio delay in milli seconds.
- dec_prm=<string>
 Specify params for audio decoder.
- enc_prm=<string>
 Specify params for audio encoder.
- filter=<string>
 Specify filters for audio.
- disposition=<string>
 Specify disposition for audio.
- metadata=<string1>=<string2>
 Specify metadata for audio track.
- bsf=<string>
 Specify bitstream filter for audio track.

Examples

Example1: --audio-source "<audio_file>:copy"
Example2: --audio-source "<audio_file>:codec=aac"
Example3: --audio-source "<audio_file>:1?codec=aac;bitrate=256/2?codec=aac;bitrate=192;metadata=language=jpn;disposition=default,forced"
Example4: --audio-source "hw:1:format=alsa/codec=aac;bitrate=256"

--chapter <string>

Set chapter in the (separate) chapter file. The chapter file could be in nero format, apple format or matroska format. Cannot be used with --chapter-copy.

nero format

CHAPTER01=00:00:39.706
CHAPTER01NAME=chapter-1
CHAPTER02=00:01:09.703
CHAPTER02NAME=chapter-2
CHAPTER03=00:01:28.288
CHAPTER03NAME=chapter-3

apple format (should be in utf-8)

<?xml version="1.0" encoding="UTF-8" ?>
  <TextStream version="1.1">
   <TextStreamHeader>
    <TextSampleDescription>
    </TextSampleDescription>
  </TextStreamHeader>
  <TextSample sampleTime="00:00:39.706">chapter-1</TextSample>
  <TextSample sampleTime="00:01:09.703">chapter-2</TextSample>
  <TextSample sampleTime="00:01:28.288">chapter-3</TextSample>
  <TextSample sampleTime="00:01:28.289" text="" />
</TextStream>

matroska format (hould be in utf-8)
Other Samples>>

<?xml version="1.0" encoding="UTF-8"?>
<Chapters>
  <EditionEntry>
    <ChapterAtom>
      <ChapterTimeStart>00:00:00.000</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>chapter-0</ChapterString>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterTimeStart>00:00:39.706</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>chapter-1</ChapterString>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterTimeStart>00:01:09.703</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>chapter-2</ChapterString>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterTimeStart>00:01:28.288</ChapterTimeStart>
      <ChapterTimeEnd>00:01:28.289</ChapterTimeEnd>
      <ChapterDisplay>
        <ChapterString>chapter-3</ChapterString>
      </ChapterDisplay>
    </ChapterAtom>
  </EditionEntry>
</Chapters>

--chapter-copy

Copy chapters from input file.

--chapter-no-trim

Do not apply --trim when reading chapters.

--key-on-chapter

Set keyframes on chapter position.

--keyfile <string>

Set keyframes on frames (starting from 0, 1, 2, ...) specified in the file. There should be one frame ID per line.

--sub-source <string>[:{<int>?}[;<param1>=<value1>...]/[]...]

Read subtitle from the specified file and mux into the output file.

file params
- format=<string>
 Specify input format for the file.
- input_opt=<string>
 Specify input options for the file.
track params
- disposition=<string>
 Specify disposition for subtitle.
- metadata=<string1>=<string2>
 Specify metadata for subtitle track.
- bsf=<string>
 Specify bitstream filter for subtitle track.

Examples

Example1: --sub-source "<sub_file>"
Example2: --sub-source "<sub_file>:disposition=default,forced;metadata=language=jpn"

--sub-copy [<int/string>;[,<int/string>]...]

Copy subtitle tracks from input file. Available only when avhw / avsw reader is used. It is also possible to specify subtitle tracks (1, 2, ...) to extract with [<int>], or select subtitle tracks to copy by language with [<string>]. Prefix languages with ! to select all tracks except those languages (for example, !eng,!jpn).

Supported subtitles are PGS / srt / txt / ttxt.

Examples

Example: Copy all subtitle tracks
--sub-copy

Example: Copy subtitle track #1 and #2
--sub-copy 1,2

Example: Copy subtitle tracks marked as English and Japanese
--sub-copy eng,jpn

--sub-disposition [<int/string>?]<string>

set disposition for the specified subtitle track.

list of dispositions

 default
 dub
 original
 comment
 lyrics
 karaoke
 forced
 hearing_impaired
 visual_impaired
 clean_effects
 attached_pic
 captions
 descriptions
 dependent
 metadata
 copy

--sub-metadata [<int/string>?]<string> or [<int/string>?]<string>=<string>

Set metadata for subtitle track.

copy ... copy metadata from input if possible (default)
clear ... do not copy metadata

Examples

Example1: copy metadata from input file
--sub-metadata 1?copy

Example2: clear metadata from input file
--sub-metadata 1?clear

Example3: set metadata
--sub-metadata 1?title="subtitle title" --sub-metadata 1?language=jpn

--sub-bsf [<int/string>?]<string>

Apply bitstream filter to subtitle track.

--data-copy [<int>[,<int>]...]

Copy data stream from input file. Available only when avhw / avsw reader is used.

--attachment-copy [<int>[,<int>]...]

Copy attachment stream from input file. Available only when avhw / avsw reader is used.

--attachment-source <string>[:{<int>?}[;<param1>=<value1>]...]...

Read attachment from the specified file and mux into the output file.

params
- metadata=<string1>=<string2>
 Specify metadata for the attachment, setting mimetype is required.

Examples

Example1: --attachment-source <png_file>:metadata=mimetype=image/png
Example2: --attachment-source <font_file>:metadata=mimetype=application/x-truetype-font

--input-option <string1>:<string2>

Pass optional parameters for input for avhw/avsw reader. Specify the option name in <string1>, and the option value in <string2>.

Examples

Example: Reading playlist 1 of bluray 
-i bluray:D:\ --input-option playlist:1

-m, --mux-option <string1>:<string2>

Pass optional parameters to muxer. Specify the option name in <string>, and the option value in <string2>.

Examples

Example: Output for HLS
-i <input> -o test.m3u8 -f hls -m hls_time:5 -m hls_segment_filename:test_%03d.ts --gop-len 30

Example: Pass through "default" disposition even if there are no "default" tracks in the output (mkv only)
-m default_mode:infer_no_subs

--metadata <string> or <string>=<string>

Set global metadata for output file.

copy ... copy metadata from input if possible (default)
clear ... do not copy metadata

Examples

Example1: copy metadata from input file
--metadata copy

Example2: clear metadata from input file
--metadata clear

Example3: set metadata
--metadata title="video title" --metadata language=jpn

--avsync <string>

auto (default)
forcecfr Check pts from the input file, and duplicate or remove frames if required to keep CFR, so that synchronization with the audio could be maintained. Please note that this could not be used with --trim.
vfr
Honor source timestamp and enable vfr output. Only available for avsw/avhw reader, and could not be used with --trim.

--timestamp-passthrough

Passthrough original timestamp. Implies --avsync vfr.

--muxer-add-cmd

Append input command line parameters to encoding_tool in muxer metadata.

--timecode [<string>]

Write timecode file to the specified path. If the path is not set, it will be written to "<output file path>.timecode.txt".

--tcfile-in <string>

Read timecode file for input frames, can be used with readers except avhw.

--timebase <int>/<int>

Set timebase for transcoding and timecode file.

--input-hevc-bsf <string>

switch hevc bitstream filter used for hw decoder input. (for debug purpose)

Parameters
- internal
  use internal implementation. (default)
- libavcodec
  use hevc_mp4toannexb bitstream filter.

--adapt-resolution <maxw>x<maxh>

Set the maximum input resolution allowed when the resolution changes in the middle of the input. This option is supported with the avsw reader. When omitted, expansion beyond the initial resolution is not allowed. Both values must be positive multiples of 2 and must not be smaller than the initial input resolution.

--input-pixel-format <string>

Set "pixel_format" for input avdevice. (not intended on other situations)

--offset-video-dts-advance

Offset timestamp to cancel bframe delay.

--allow-other-negative-pts

Allow negative timestamps for audio, subtitles. Intended for debug purpose only.

Vpp Options

These options will apply filters before encoding.

Vpp Filtering order

Vpp filters will be applied in fixed order, regardless of the order in the commandline.

filter list

--vpp-colorspace [<param1>=<value1>[,<param2>=<value2>]...]

Converts colorspace of the video. Available on x64 version.
Values for parameters will be copied from input file for "input".

parameters
- matrix=<from>:<to>
```
 bt709, smpte170m, bt470bg, smpte240m, YCgCo, fcc, GBR, bt2020nc, bt2020c, auto
```
- colorprim=<from>:<to>
```
 bt709, smpte170m, bt470m, bt470bg, smpte240m, film, bt2020, auto
```
- transfer=<from>:<to>
```
 bt709, smpte170m, bt470m, bt470bg, smpte240m, linear,
 log100, log316, iec61966-2-4, iec61966-2-1,
 bt2020-10, bt2020-12, smpte2084, arib-std-b67, auto
```
- range=<from>:<to>
```
 limited, full, auto
```
- lut3d=<string>
 Apply a 3D LUT to an input video. Curretly supports .cube file only.
- lut3d_interp=<string>
```
nearest, trilinear, tetrahedral, pyramid, prism
```
- hdr2sdr=<string>
 Enables HDR10 to SDR by selected tone-mapping.
 - none (default)
 hdr2sdr processing is disabled.
 - hable
 Trys to preserve both bright and dark detailes, but with rather dark result. You may specify addtional params (a,b,c,d,e,f) for the hable tone-mapping function below.
 
 hable(x) = ( (x * (ax + cb) + de) / (x * (ax + b) + d*f) ) - e/f
 output = hable( input ) / hable( (source_peak / ldr_nits) )
 
 defaults: a = 0.22, b = 0.3, c = 0.1, d = 0.2, e = 0.01, f = 0.3
 - mobius
 Trys to preserve contrast and colors while bright details might be removed.
 - transition=<float> (default: 0.3)
 Threshold to move from linear conversion to mobius tone mapping.
 - peak=<float> (default: 1.0)
 reference peak brightness
 - reinhard
 - contrast=<float> (default: 0.5)
 local contrast coefficient
 - peak=<float> (default: 1.0)
 reference peak brightness
 - bt2390
 Perceptual tone mapping curve EETF) specified in BT.2390.
- source_peak=<float> (default: 1000.0)
- ldr_nits=<float> (default: 100.0)
 Target brightness for hdr2sdr function.
- desat_base=<float> (default: 0.18)
 Offset for desaturation curve used in hdr2sr.
- desat_strength=<float> (default: 0.75)
 Strength of desaturation curve used in hdr2sr. 0.0 will disable the desaturation, 1.0 will make overly bright colors will tend towards white.
- desat_exp=<float> (default: 1.5)
 Exponent of the desaturation curve used in hdr2sr. This controls the brightness of which desaturated is going to start. Lower value will make the desaturation to start earlier.

Examples

example1: convert from BT.601 -> BT.709
--vpp-colorspace matrix=smpte170m:bt709

example2: using hdr2sdr (hable tone-mapping)
--vpp-colorspace hdr2sdr=hable,source_peak=1000.0,ldr_nits=100.0

example3: using hdr2sdr (hable tone-mapping) and setting the coefs (this is example for the default settings)
--vpp-colorspace hdr2sdr=hable,source_peak=1000.0,ldr_nits=100.0,a=0.22,b=0.3,c=0.1,d=0.2,e=0.01,f=0.3

--vpp-libplacebo-tonemapping [<param1>=<value1>][,<param2>=<value2>],...

Performs tone mapping using libplacebo.

Parameters
- src_csp=<string>
 Input color space.
```
auto, sdr, hdr10, hlg, dovi, rgb
```
- dst_csp=<string>
 Output color space.
```
auto, sdr, hdr10, hlg, dovi, rgb
```
- src_max=<float>
 Input maximum luminance (nits). (Default: auto, tries to get info from input file if possible, otherwise 1000.0 (HDR) / 203.0 (SDR))
- src_min=<float>
 Input minimum luminance (nits). (Default: auto, tries to get info from input file if possible, otherwise 0.005 (HDR) / 0.2023 (SDR))
- dst_max=<float>
 Output maximum luminance (nits). (Default: auto, tries to get info from parameters if possible, otherwise 1000.0 (HDR) / 203.0 (SDR))
- dst_min=<float>
 Output minimum luminance (nits). (Default: auto, tries to get info from parameters if possible, otherwise 0.005 (HDR) / 0.2023 (SDR))
- dynamic_peak_detection=<bool>
 Enables computation of signal stats to optimize HDR tone mapping quality. Default: true
- smooth_period=<float>
 Smoothing coefficient for detected values. Default: 20.0
- scene_threshold_low=<float>
 Lower threshold for scene change detection (dB). Default: 1.0
- scene_threshold_high=<float>
 Upper threshold for scene change detection (dB). Default: 3.0
- percentile=<float>
 Percentile to consider for luminance histogram. Default: 99.995
- black_cutoff=<float>
 Black level cutoff intensity (PQ%). Default: 1.0
- gamut_mapping=<string>
 Gamut mapping mode. (Default: perceptual)
```
clip, perceptual, softclip, relative, saturation, absolute, desaturate, darken, highlight, linear
```
- tonemapping_function=<string>
 Tone mapping function. (Default: bt2390)
```
clip, st2094-40, st2094-10, bt2390, bt2446a, spline, reinhard, mobius, hable, gamma, linear, linearlight
```
- for tonemapping_function=st2094-40, st2094-10, spline
 - knee_adaptation=<float> (float, 0.0 - 1.0, default: 0.4)
 Configures the knee point as a ratio between the source and target average brightness in PQ space.
 - 1.0: Always adapts source scene average to scaled target average
 - 0.0: Never modifies scene brightness
 - knee_min=<float> (0.0 - 0.5, default: 0.1)
 Minimum knee point in ratio of PQ luminance range.
 - knee_max=<float> (0.5 - 1.0, default: 0.8)
 Maximum knee point in ratio of PQ luminance range.
 - knee_default=<float> (knee_min - knee_max, default: 0.4)
 Default knee point used when source scene average metadata is unavailable.
- for tonemapping_function=bt2390
 - knee_offset=<float> (0.5 - 2.0, default: 1.0)
 Knee point offset.
- for tonemapping_function=spline
 - slope_tuning=<float> (0.0 - 10.0, default: 1.5)
 Coefficient for the slope of the spline curve.
 - slope_offset=<float> (0.0 - 1.0, default: 0.2)
 Slope offset of the spline curve.
 - spline_contrast=<float> (0.0 - 1.5, default: 0.5)
 Contrast for the spline function. Higher values preserve midtones but may lose shadow/highlight details.
- for tonemapping_function=reinhard
 - reinhard_contrast=<float> (0.0 - 1.0, default: 0.5)
 contrast coefficient at display peak for the reinhard function.
- for tonemapping_function=mobius, gamma
 - linear_knee=<float> (0.0 - 1.0, default: 0.3)
- for tonemapping_function=linear, linearlight
 - exposure=<float> (0.0 - 10.0, default: 1.0)
 Linear exposure/gain applied.
- metadata=<int>
 Data source to use for tone mapping.
```
any, none, hdr10, hdr10plus, cie_y
```
- contrast_recovery=<float>
 Contrast recovery strength. Default: 0.3
- contrast_smoothness=<float>
 Contrast recovery lowpass kernel size. Default: 3.5
- inverse_tone_mapping=<bool>
 Inverse tone mapping. Default: false
- visualize_lut=<bool>
 Visualize tone mapping curve/LUT. Default: false
- show_clipping=<bool>
 Graphically highlight hard-clipped pixels. Default: false
- use_dovi=<bool>
 Whether to use Dolby Vision RPU as ST2086 metadata. Default: auto (enabled when tone mapping from Dolby Vision)
- dst_pl_transfer=<string>
 Output transfer function. Must be used with dst_pl_colorprim.
```
unknown, srgb, bt1886, linear, gamma18, gamma20, gamma22, gamma24, gamma26, gamma28,
prophoto, st428, pq, hlg, vlog, slog1, slog2
```
- dst_pl_colorprim=<string>
 Output color primaries. Must be used with dst_pl_transfer.
```
unknown, bt601_525, bt601_625, bt709, bt470m, ebu_3213, bt2020, apple, adobe,
prophoto, cie_1931, dci_p3, display_p3, v_gamut, s_gamut, film_c, aces_ap0, aces_ap1
```

Examples

Example: Dolby Vision to SDR tone mapping
--vpp-libplacebo-tonemapping src_csp=dovi,dst_csp=sdr

--vpp-libplacebo-tonemapping-lut <string>

lut file path used in --vpp-libplacebo-tonemapping.

--vpp-rff

Reflect the Repeat Field Flag. The avsync error caused by rff could be solved. Available only when --avsw is used.

rff of 2 or more will not be supported (only supports rff = 1). Also, it can not be used with --trim.

--vpp-delogo <string>[,<param1>=<value1>][,<param2>=<value2>],...

Parameters

select=<string>
For logo pack, specify the logo to use with one of the following.
- Logo name
- Index (1, 2, ...)
- Automatic selection ini file
For logo pack, specify the logo to use with one of the following.
Logo name
Index (1, 2, ...)

Automatic selection ini file

 [LOGO_AUTO_SELECT]
 logo<num>=<pattern>,<logo name>

Example:

[LOGO_AUTO_SELECT]
logo1= (NHK-G).,NHK総合 1440x1080
logo2= (NHK-E).,NHK-E 1440x1080
logo3= (MX).,TOKYO MX 1 1440x1080
logo4= (CTC).,チバテレビ 1440x1080
logo5= (NTV).,日本テレビ 1440x1080
logo6= (TBS).,TBS 1440x1088
logo7= (TX).,TV東京 50th 1440x1080
logo8= (CX).,フジテレビ 1440x1088
logo9= (BSP).,NHK BSP v3 1920x1080
logo10= (BS4).,BS日テレ 1920x1080
logo11= (BSA).,BS朝日 1920x1080
logo12= (BS-TBS).,BS-TBS 1920x1080
logo13= (BSJ).,BS Japan 1920x1080
logo14= (BS11).,BS11 1920x1080 v3

pos <int>:<int>
Adjustment of logo position with 1/4 pixel accuracy in x:y direction.
depth <int>
Adjustment of logo transparency. Default 128.
y=<int>
cb=<int>
cr=<int>
Adjustment of each color component of the logo.

--vpp-afs [<param1>=<value1>[,<param2>=<value2>]...]

Activate Auto Field Shift (AFS) deinterlacer.

parameters

top=<int>
bottom=<int>
left=<int>
right=<int>
clip out the range to decide field shift.
method_switch=<int> (0 - 256)
threshold to swicth field shift algorithm.
coeff_shift=<int> (0 - 256)
threshold for field shift, with bigger value, more field shift will be occurred.
thre_shift=<int> (0 - 1024)
threshold for stripe detection which will be used on shift decision. Lower value will result more stripe detection.
thre_deint=<int> (0 - 1024)
threshold for stripe detection which will be used on deinterlacing. Lower value will result more stripe detection.
thre_motion_y=<int> (0 - 1024)
thre_motion_c=<int> (0 - 1024)
threshold for motion detection. Lower value will result more motion detection.

level=<int> (0 - 4)
Select how to remove the stripes.

level	process	target	decription
0	none		Stripe removing process will not be done. New frame generated by field shift will be the output.
1	triplication	all pixels	Blend previous field into new frame generated by field shift. Stripe caused be motion will all become afterimage.
2	duplicate	stripe-detected pixels	Blend previous field into new frame generated by field shift, only on stripe detected pixels. Should be used for movies with little motion.
3 (default)	duplicate	motion-detected pixels	Blend previous field into new frame generated by field shift, only on motion detected pixels. This mode can preserve more edges or small letters compared to level 2.
4	interpolate	motion-detected pixels	On motion detected pixels, drop one field, and generate pixel by interpolating from the other field. There will be no afterimage, but the vertical resolution of pixels with motion will halved.

shift=<bool>
Enable field shift.
drop=<bool>
drop frame which has shorter display time than "1 frame". Note that enabling this option will generate VFR (Variable Frame Rate) output. When muxing is done by VCEEncC, the timecode will be applied automatically. However, when using raw output, you will need output timecode file by adding "timecode=true" to vpp-afs option, and mux the timecode file later.
smooth=<bool>
Smoothen picture display timing.
24fps=<bool>
Force 30fps -> 24fps conversion.
tune=<bool>
When this options is set true, the output will be the result of motion and stripe detection, shown by the color below.

color description
dark blue motion was detected
grey stripe was detected
light blue motion & stripe was detected
rff=<bool>
When this options is set true, rff flag from input will be checked, and when there is progressive frame coded with rff, then deinterlacing will not be applied.
log=<bool>
Generate log of per frame afs status (for debug).

color	description
dark blue	motion was detected
grey	stripe was detected
light blue	motion & stripe was detected

preset=<string>
Parameters will be set as below.

preset name	default	triple	double	anime cinema	min_afterimg	24fps	30fps
method_switch	0	0	0	64	0	92	0
coeff_shift	192	192	192	128	192	192	192
thre_shift	128	128	128	128	128	448	128
thre_deint	48	48	48	48	48	48	48
thre_motion_y	112	112	112	112	112	112	112
thre_motion_c	224	224	224	224	224	224	224
level	3	1	2	3	4	3	3
shift	on	off	on	on	on	on	off
drop	off	off	on	on	on	on	off
smooth	off	off	on	on	on	on	off
24fps	off	off	off	off	off	on	off
tune	off	off	off	off	off	off	off

examples

example: same as --vpp-afs preset=24fps
--vpp-afs preset=anime,method_switch=92,thre_shift=448,24fps=true

--vpp-nnedi [<param1>=<value1>[,<param2>=<value2>]...]

nnedi deinterlacer.

parameters
- planes=<string>
 Target planes. all, or :-separated list of y, u, v. Default: all.
- field
 - auto (default)
 Generate latter field from first field.
 - top
 Generate bottom field using top field.
 - bottom
 Generate top field using bottom field.
- nns (default: 32)
 Neurons of neural net.
 - 16, 32, 64, 128, 256
- nsize (default: 32x4)
 Area size which neural net uses to generate a pixel.
 - 8x6, 16x6, 32x6, 48x6, 8x4, 16x4, 32x4
- quality
 quality settings.
 - fast (default) Use one neural net to generate output.
 - slow
 "slow" uses another neural net and blends 2 outputs from different network to enhance quality.
- prescreen
 - none
 No pre-screening is done and all pixels will be generated by neural net.
 - original
 - new (default)
 Runs prescreener to determine which pixel to apply neural net, other pixels will be generated from simple interpolation.
 - original_block
 - new_block (default)
 GPU optimized version of "original", "new". Applies screening based on block, and not pixel.
- errortype
 Select weight parameter for neural net.
 - abs (default)
 Use weight trained to minimize absolute error.
 - square
 Use weight trained to minimize square error.
- prec
 Select precision.
 - auto (default)
 Use fp16 whenever it is available and will be faster, otherwise use fp32.
 - fp16
 Force to use fp16. x64 only.
 - fp32
 Force to use fp32.
- weightfile
 Set path of weight file. By default (not specified), internal weight params will be used.

Examples

example: --vpp-nnedi field=auto,nns=64,nsize=32x6,quality=slow,prescreen=none,prec=fp32

--vpp-bwdif [<param1>=<value1>]

Bwdif deinterlacer.

parameters
- mode
  - frame (default) Same-rate output, one frame per input frame.
  - bob Double-rate output, two frames per input frame.
- order
  - auto (default) Detect field order from each input frame.
  - tff Assume top field first.
  - bff Assume bottom field first.
- thr Motion threshold. Default: 0.0 (0.0 - 100.0).

--vpp-yadif [<param1>=<value1>]

Yadif deinterlacer.

parameters
- mode
  - auto (default)
    Generate latter field from first field.
  - tff
    Generate bottom field using top field.
  - bff
    Generate top field using bottom field.
  - bob
    Generate one frame from each field.
  - bob_tff
    Generate one frame from each field assuming top field first.
  - bob_bff
    Generate one frame from each field assuming bottom field first.

--vpp-rtgmc [<param1>=<value1>]

High quality QTGMC deinterlacer with relaxed implementation for GPU.

major parameters

preset=<string> slower, slow, medium, fast, faster (default), veryfast, superfast, ultrafast, draft. This refers the original values.
tuning=<string> none (default), dv-sd, dv-hd.

preset expansion table (implementation values)

preset	tr0	tr1	tr2	rep0-thin	rep2-thin	edi	nnsize	nneurons	search_refine	search	searchparam	pelsearch	search_early_sad	chroma_motion	precise	prog_sad_mask
slower	2	2	1	4	4	nnedi3	1	1	3	4	2	2	0	on	off	10.0
slow	2	1	1	4	4	nnedi3	1	1	3	4	2	2	0	off	off	10.0
medium	2	1	1	3	4	nnedi3	5	1	3	4	2	1	8	off	off	10.0
fast	2	1	0	3	4	nnedi3	5	0	2	4	2	1	8	off	off	0.0
faster	1	1	0	0	4	nnedi3	4	0	2	4	2	1	16	off	off	0.0
veryfast	1	1	0	0	4	nnedi3	4	0	2	4	1	1	16	off	off	0.0
superfast	1	1	0	0	3	nnedi3	4	0	1	0	1	1	16	off	off	0.0
ultrafast	1	1	0	0	3	repyadif	4	0	1	0	1	1	16	off	off	0.0
draft	0	1	0	0	0	bob	4	0	0	0	1	1	16	off	off	0.0

blksize is tuning-dependent (dv-hd=32, otherwise 16) for slower..fast, and fixed to 32 for faster..draft.
overlap is blksize/2 for slower..faster, and blksize/4 for veryfast..draft.
subpel is 2 for slower..slow, and 1 for medium..draft.

source_match=<int> 0-3. match_tr1/match_tr2 are 0-2; match_enhance is 0.0-1.0.
edi/match_edi=<string> bob, yadif, cyadif, repyadif, repcyadif, nnedi3, passthrough. For source_match>0, match_edi is limited to bob/yadif/cyadif/repyadif/repcyadif/nnedi3.
tr0/rep0-thin/rep0-pad/search_refine tr0=-1..2, rep0-thin=0-7, rep0-pad=0-3, search_refine=0-3.
mv_spatial_refine=<int|auto>
Motion-vector spatial refinement count. Motion estimation proceeds through a coarse-to-fine pyramid of analysis levels; this option controls how many spatial refinement passes (which consult neighboring block motion vectors to further improve precision) are run at each level. Default is auto (-1): perform spatial refinement only at the coarsest (lowest-resolution) level, where the block count is smallest, and skip it at all finer levels. This concentrates spatial-neighbor based refinement on the level where its serial-dependency cost is negligible, while letting the finer levels (with many blocks) run with maximum GPU parallelism. 0 disables spatial refinement at every level; 1 runs one pass at every level, 2 runs two passes at every level, and so on.
rep1-thin/rep1-pad/rep2-thin/rep2-pad repN-thin=0-7, repN-pad=0-3.
noise group This stage controls noise extraction, denoising, and grain/noise restoration.
- noise_process Master mode for the noise path. 0 disables noise processing, 1 enables the current denoise/restore path, 2 is currently unsupported.
- denoiser Denoiser selection. nlmeans uses the NLMeans path, while fft3d uses the FFT3D path.
- noise_deint Deinterlace mode for extracted noise. none keeps as-is, bob uses bob-style interpolation, generate is currently unsupported.
- sigma Denoise strength proxy; higher values increase smoothing.
- chroma_noise Whether chroma planes are included in noise processing.
- grain_restore / noise_restore Amount of texture/noise restored after denoising; currently valid only with noise_process=1. Effective support is constrained as listed in Note below.
motion group This stage controls motion-vector search behavior and temporal reference direction.
- searchparam / pelsearch Search preset factors. 1 is lighter/faster, 2 is more exhaustive.
- search_early_sad=<int|off>
 Skip the level0 full search when the predictor SAD is below this threshold. The value is in 8x8-block, 8-bit SAD units (0-65535) and is scaled automatically for blksize and bit depth; off (-1) disables it. Preset defaults are listed above.
- spatial_early_sad=<int|off> Skip spatial refinement for a block when the SAD selected by the level1 search is below this threshold. The value is in 8x8-block, 8-bit SAD units (0-65535) and is scaled automatically for blksize and bit depth. Default: off (-1).
- useflag Temporal direction limit. 0 uses both directions, 1 backward-only, 2 forward-only.
- pel / levels / lambda / lsad / pnew / plevel / globalmotion Additional block-matching controls for subpixel granularity, search hierarchy, penalties, and global motion handling. subpelinterp=2, truemotion=false, and dct=0 are fixed for CUDA-reference compatibility.
retouch group Final resharpen/limit stage for edge recovery and anti-overshoot control.
- sharpness Base sharpening amount (0.0-1.0).
- limit Legacy-compatible limiting factor (0.0-1.0) to reduce sharpening overshoot.
- smode Sharpening path selector (0-2). 0 is effectively off; 1/2 use different retouch paths.
- slmode / slrad / sovs Sharpen-limit mode, radius, and overshoot allowance (slmode=0-4, slrad=0-3, sovs>=0).
- svthin Vertical thinning strength (0.0-1.0) to suppress line-thickening artifacts.
- sbb Back-blend mode (0-3) controlling where sharpen/unsharpen differences are mixed.
- precise Enables the precise retouch path variant (on/off).

Note (Limitations)
- EDI is limited to bob/yadif/cyadif/repyadif/repcyadif/nnedi3(rnnedi3)-equivalent modes. NNEDI2/NNEDI/ EEDI3(+NNEDI3)/EEDI2/TDeint, EdiMaxD, and EdiThreads are not supported.
- chroma_edi supports only none or nnedi3(rnnedi3).
- Noise processing does not support noise_process=2, ezkeepgrain, denoise_mc=true, noise_tr>0, noise_deint=generate, ShowNoise, StabilizeNoise, dfttest/KNLMeansCL, or lsb/lsbd/DftDither-equivalent paths.
- source_match supports stages 0-3, but per-stage MatchPreset/MatchPreset2 settings, independent MatchEdi2, and EdiMaxD-related settings are not supported. match_edi is limited to bob/yadif/cyadif/repyadif/repcyadif/nnedi3.
- Motion blur and frame decimation options such as FPSDivisor, ShutterBlur, ShutterAngleSrc/Out, and SBlurLimit are not supported.
- Some KTGMC/MVTools parameters are fixed or restricted: subpelinterp=2, dct=0, truemotion=false, and searchparam/ pelsearch are limited to 1-2.

--vpp-rtgmc-bob [<param1>=<value1>]

For debug. Parameters: order=auto|tff|bff.

--vpp-rtgmc-search-prefilter [<param1>=<value1>]

For debug. Parameters: tr0, rep0-thin, rep0-pad, search_refine, tv_range, chroma_motion, dump_y4m, dump_stage, dump_max_frames.

--vpp-rtgmc-edi [<param1>=<value1>]

For debug. Parameters: mode, nnsize, nneurons, ediqual, chroma_edi.

--vpp-rtgmc-retouch [<param1>=<value1>]

For debug. Parameters: sharpness, limit, smode, slmode, slrad, sovs, svthin, sbb, precise, tr1, tr2.

--vpp-rtgmc-shimmer-repair [<param1>=<value1>]

For debug. Parameters: stage=rep1|rep2, rep-thin, rep-pad, rep_chroma.

--vpp-rtgmc-primitive [<param1>=<value1>]

For debug. Parameters: op, ref, mode, weight, chroma.

--vpp-degrain [<param1>=<value1>]

Motion compensated degrain debug filter.

parameters
- preset=<string>
 Surface preset. custom (default), auto. This refers the original values.
- mode=<string>
 Output mode. source (default), analyze, compb, compf, compb2, compf2, degrain, mv, sad.
- stage=<string>
 Step2 stage marker. auto (default), tr1, tr2.
- tr=<int>
 Auto preset temporal radius. 1 or 2. Sets mode=degrain, stage, and delta.
- blksize/search/overlap/delta/levels/pel
 Block matching geometry and temporal radius parameters.
- thsad/thsadc/thscd1/thscd2
 Degrain and scene-change thresholds.
- tr0/rep0/search_refine
 Search reference prefilter parameters.
- searchparam/pelsearch/truemotion/lambda/lsad/pnew/plevel/globalmotion/dct/useflag
 Motion search tuning parameters.
- search_early_sad=<int|off>
 Skip the level0 full search when the predictor SAD is below this threshold. The value is in 8x8-block, 8-bit SAD units (0-65535) and is scaled automatically for blksize and bit depth. Default: off (-1).
- spatial_early_sad=<int|off>
 Skip spatial refinement for a block when the SAD selected by the level1 search is below this threshold. The value is in 8x8-block, 8-bit SAD units (0-65535) and is scaled automatically for blksize and bit depth. Default: off (-1).
- mv_spatial_refine=<int|auto>
 Motion-vector spatial refinement count. Default is auto (-1): run spatial refinement (which consults neighboring block motion vectors) only at the coarsest (lowest-resolution) analysis level, and skip it at all finer levels. This concentrates spatial-neighbor refinement on the level where serial-dependency cost is small, and lets the finer levels run with maximum GPU parallelism. 0 disables it entirely; 1 runs one pass at every level, 2 runs two passes at every level, and so on.
- chroma/binomial/tv_range
 Chroma analysis and prefilter/range controls.
Note (Limitations)
- Analysis modes require levels=2.
- Analysis supports only blksize=8, 16, or 32.
- overlap supports only 0 or blksize/2.
- delta supports 1-5, but delta>2 is supported only for analyze or stage=tr2 degrain.
- pel supports only 1, 2, or 4.

--vpp-kfm [<param1>=<value1>[,<param2>=<value2>]...]

Adaptive inverse telesine filter supporting 24/30/60 mixed VFR output using --vpp-rtgmc.

Please note that this filter is slow, recommended to be used on dGPUs.

parameters
- mode=<string>
 Output mode. vfr (default), 60, 24.
- preset=<string>
 Reserved nested preset. slower, slow, medium, fast, faster (default), veryfast, superfast, ultrafast, draft.
- search_early_sad=<int|auto|off>
 SAD threshold for skipping the level0 full search, in 8x8-block, 8-bit SAD units (0-65535), scaled automatically for blksize and bit depth. auto (default) uses the preset value; off (-1) disables it.
- spatial_early_sad=<int|auto|off>
 Skip spatial refinement for a block when the SAD selected by the level1 search is below this threshold. The value is in 8x8-block, 8-bit SAD units (0-65535) and is scaled automatically for blksize and bit depth. auto (default) uses the preset value (slower/slow: 0, medium: 16, fast: 32, faster through draft: 64); off (-1) disables it.
- timing=<string>
 Timing analysis mode. realtime, realtime+ (default), strict.
- past_cycles=<int>
 Commit delay cycles for realtime+. Default: 30.
- thswitch=<float>
 60p switch threshold. Default: 0.5.
- ucf=<bool>
 Enable the UCF stage. Default: off.
- nr=<bool>
 Apply SMDegrain on the final KFM output stream. Default: off.
- is120=<bool>
 Reserve 120fps duration correction flag. Default: on.
- rff=<bool>
 Preserve progressive RFF input frames without deinterlacing them. The input timestamps are used as the timing anchor. Default: on.
- debug=<bool>
 Write .result.dat and .frameinfo.tsv dumps when timecode is specified. Default: off.
- debug_stage=<string> none, switch-flag (switch-flag-min), contains-combe, combe-mask (combe-mask-min). Used for 24p debug output selection.
- timecode=<path>
 Timecode v2 dump path. In mode=24/vfr, *.duration.txt is also emitted.
Note
- Parameters such as pass, svp, cuda/dev/threads are not exposed as CLI parameters.

--vpp-decomb [<param1>=<value1>[,<param2>=<value2>]...]

Decomb deinterlaer.

parameters
- full=<bool>
 deinterlace all frames. default on.
- threshold=<int>
 threshold for combed frame detection. default 20 (0 - 255).
- dthreshold=<int>
 threshold for deinterlacing frames detected as combed. default 7 (0 - 255).
- blend=<bool>
 blend rather than interpolate. default off.

--vpp-ivtc [<param1>=<value1>[,<param2>=<value2>]...]

Inverse telecine for soft-telecine / hard-telecine sources.

parameters
- guide=<int> (default: 1)
 Matching mode.
 - 0
 Select the candidate with the minimum match-quality from C/P/N. Note: if C is fully progressive (zero combing), it is always kept to avoid introducing combing from mixing fields of different time origins.
 - 1
 Prefer C when it is clean enough, otherwise choose from P/N.
- post=<int> (default: 2)
 Post process for residual combing.
 - 0
 No post process.
 - 2
 Per-pixel adaptive bob-deinterlace on second-field rows. Only pixels detected as combed are replaced with the vertical average of adjacent first-field rows. First-field rows are always passed through untouched.
- nt=<int> (default: 10)
 Match-metric noise tolerance in 8-bit scale.
- cthresh=<int> (default: 4)
 Per-pixel comb threshold used in match scoring in 8-bit scale.
- combpel=<int> (default: 8)
 Number of combed pixels per block before the block is counted as combed.
- scthresh=<float> (default: 0.0)
 Scene-change threshold as a fraction of the maximum SAD. 0.0 uses the adaptive threshold.

--vpp-decimate [<param1>=<value1>[,<param2>=<value2>]...]

Drop duplicated frame in cycles set.

parameters
- cycle=<int> (default: 5)
 num of frame to select frame(s) to be droppped.
- drop=<int> (default: 1)
 num of frame(s) to drop within a cycle.
- thredup=<float> (default: 1.1, 0.0 - 100.0)
 duplicate threshold.
- thresc=<float> (default: 15.0, 0.0 - 100.0)
 scene change threshold.
- blockx=<int>
- blocky=<int>
 block size of x and y direction, default = 32. block size could be 4, 8, 16, 32, 64.
- chroma=<bool>
 consdier chroma (default: on).
- log=<bool>
 output log file (default: off).

--vpp-mpdecimate [<param1>=<value1>[,<param2>=<value2>]...]

Drop consequentive duplicate frame(s) and create a VFR video, which might improve effective encoding performance, and improve compression efficiency. Please note that --avsync vfr is automatically activated when using this filter.

parameters
- hi=<int> (default: 768, 8x8x12)
 The frame might be dropped if no 8x8 block difference is more than "hi".
- lo=<int> (default: 320, 8x8x5)
- frac=<float> (default: 0.33)
 The frame might be dropped if the fraction of 8x8 blocks with difference smaller than "lo" is more than "frac".
- max=<int> (default: 0)
 Max consecutive frames which can be dropped (if positive).
 Min interval between dropped frames (if negative).
- keep=<int> (default: 0)
 Number of similar consecutive frames to keep before starting to drop.
- log=<bool>
 output log file. (default: off)

--vpp-rotate <int>

Rotate video. 90, 180, 270 degrees is allowed.

--vpp-transform [<param1>=<value1>][,<param2>=<value2>],...

Parameters
- flip_x=<bool>
- flip_y=<bool>
- transpose=<bool>

--vpp-convolution3d [<param1>=<value1>[,<param2>=<value2>]...]

3d noise reduction.

Parameters
- matrix=<string> (default=original)
 select matrix to use.
 - standard
```
1 2 1 2 4 2 1 2 1 
2 4 1 4 8 4 2 4 1 
1 2 1 2 4 2 1 2 1 
```
 - simple
```
1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 
```
- fast=<bool&gt (default=false)
 Use more simple fast mode.
- ythresh=<float> (default=3, 0-255)
 Spatial luma threshold to take care of edges. Larger threshold will result stronger denoising, but blurring might occur arround edges.
- cthresh=<float> (default=4, 0-255)
 Spatial chroma threshold. Larger threshold will result stronger denoising, but blurring might occur arround edges.
- t_ythresh=<float> (default=3, 0-255)
 Temporal luma threshold. Larger threshold will result stronger denoising, but ghosting might occur. Threshold below 10 is recommended.
- t_cthresh=<float> (default=4, 0-255)
 Temporal chroma threshold. Larger threshold will result stronger denoising, but ghosting might occur. Threshold below 10 is recommended.

Examples

Example: using simple matrix
--vpp-convolution3d matrix=simple

--vpp-smooth [<param1>=<value1>[,<param2>=<value2>]...]

parameters
- quality=<int> (default=3, 1-6)
 Quality of the filter. Larger value should result in higher quality but with lower speed.
- qp=<int> (default=12, 1 - 63)
 Strength of the filter. Larger value will result stronger denoise but with blurring.
- prec
 Select precision.
 - auto (default)
 Use fp16 whenever it is available and will be faster, otherwise use fp32.
 - fp16
 Force to use fp16. x64 only.
 - fp32
 Force to use fp32.

--vpp-denoise-dct [<param1>=<value1>][,<param2>=<value2>],...

parameters
- step=<int>
 Quality of the filter. Smaller value should result in higher quality but with lower speed.
 - 1 (high quality, slow)
 - 2 (default)
 - 4
 - 8 (fast)
- sigma=<float> (default=4.0)
 Strength of the filter. Larger value will result stronger denoise but with blurring.
- block_size=<int> (default=8)
 - 8
 - 16 (slow)

--vpp-fft3d [<param1>=<value1>][,<param2>=<value2>],...

FFT based denoise filter.

parameters
- sigma=<float>
 Strength of filter. (default=1.0, 0.0 - 100.0)
- sigma2=<float> / sigma3=<float> / sigma4=<float>
 Filter strength for mid-high / mid-low / low frequencies. 0.0 uses the same value as sigma. (default=0.0, 0.0 - 100.0)
- amount=<float> (default=1.0, 0.0 - 1.0)
 Amount of denoising.
- block_size=<int> (default=32)
 - 8
 - 16
 - 32
 - 64
- overlap=<float> (default=0.5, 0.2 - 0.8)
 Block overlap, value 0.5 or larger is recomended.
- method=<int> (default = 0)
 - 0 ... wiener method
 - 1 ... hard thresholding
- temporal=<int> (default = 1)
 - 0 ... spatial filtering only
 - 1 ... enable temporal filtering
- bt=<int> (default = 0)
 - 0 ... follow temporal
 - 1 ... spatial only
 - 2 ... previous + current frame
 - 3 ... previous + current + next frame
 - 4 ... 2 previous + previous + current + next frame
 - -1 ... sharpen/degrid only
- sharpen=<float>
 Frequency-domain sharpening strength. 0.0 disables it. (default=0.0, -10.0 - 10.0)
- scutoff=<float>
 Sharpen cutoff frequency. (default=0.30, 0.0 - 1.0)
- svr=<float>
 Sharpen vertical ratio. 0.0 disables vertical sharpening. (default=1.00, 0.0 - 10.0)
- smin=<float> / smax=<float>
 Minimum / maximum sharpening limits. (default=10.0/100.0)
- degrid=<float>
 Block grid compensation strength. 0.0 disables it, 1.0 applies the standard compensation. (default=0.0, 0.0 - 2.0)
- signorm=<bool>
 Interpret sigma/smin/smax as real noise-power units. false keeps the legacy-compatible scale. (default=false)
- prec=<string> (default = auto)
 - auto ... use fp16 if possible (faster)
 - fp32 ... always use fp32

--vpp-msmooth [<param1>=<value1>[,<param2>=<value2>]...]

Detail-preserving smoothing filter based on Donald A. Graft's MSmooth. Detects edges to create a mask, then applies iterative smoothing to non-edge areas.

Parameters
- strength=<int> (default=3, 0 - 20)
 Number of smoothing iterations. Higher values produce stronger smoothing.
- threshold=<float> (default=15.0, 0.0 - 255.0)
 Edge detection threshold.
- threshold_c=<float> (default=-1.0, -1.0 / 0.0 - 255.0)
 Edge detection threshold for chroma planes. -1.0 uses the same value as threshold.
- highq=<bool> (default=true)
 When true, uses 4-direction edge detection (diagonal + horizontal/vertical). When false, uses only 2 diagonal directions.
- mask=<bool> (default=false)
 When true, outputs edge mask instead of smoothed result (for debugging).

examples

Example: Default settings
--vpp-msmooth

Example: Stronger smoothing
--vpp-msmooth strength=6,threshold=10.0,threshold_c=18.0

--vpp-knn [<param1>=<value1>[,<param2>=<value2>]...]

Strong noise reduction filter.

Parameters
- radius=<int> (default=3, 1-5)
 radius of filter. Larger value will result stronger denosing, but will require more calculation.
- d=<int> (default=0, 0 - 2)
 Temporal radius. Previous/next frames are included in the weighting window.
- strength=<float> (default=0.08, 0.0 - 1.0)
 Strength of the filter. Larger value will result stronger denosing.
- lerp=<float> (default=0.2, 0.0 - 1.0)
 The degree of blending of the original pixel to the noise reduction pixel.
- th_lerp=<float> (default=0.8, 0.0 - 1.0)
 Threshold of edge detection.

Examples

Example: slightly stronger than default
--vpp-knn radius=3,strength=0.10,lerp=0.1

--vpp-nlmeans [<param1>=<value1>[,<param2>=<value2>]...]

Non local means noise reduction filter.

Parameters
- sigma=<float> (default=0.005, 0.0 -)
 Noise variance. Larger value will result stronger denosing.
- h=<float> (default=0.05, 0.0 <)
 Parameter. Larger value will result the weight to be more flat.
- patch=<int> (default=5, 3 - )
 Set patch size. Must be odd number.
- search=<int> (default=11, 3 - )
 Set search size. Must be odd number.
- d=<int> (default=0, 0 - 5)
 Temporal radius. 0 uses spatial NLMeans only.
- search_t=<int> (default=11, 3 - )
 Set temporal search size. Must be odd number.
- fp16=<string> (default=blockdiff)
 - none
 Do not use fp16 and use fp32. High precision but slow.
 - blockdiff
 Use fp16 in block diff calculation. Balanced between performace and precision.
 - all
 Additionally use fp16 in weight calculation. Fast but low precision.

Examples

Example: Use larger search area
--vpp-nlmeans patch=7,search=15

Example: Enable temporal NLMeans
--vpp-nlmeans d=1,search_t=7

--vpp-pmd [<param1>=<value1>[,<param2>=<value2>]...]

Rather weak noise reduction by modified pmd method, aimed to preserve edge while noise reduction.

Parameters
- apply_count=<int> (default=2, 1- )
 Number of times to apply the filter. Applying filter many times will remove noise stronger.
- strength=<float> (default=100, 0-100)
 Strength of the filter.
- threshold=<float> (default=100, 0-255)
 Threshold for edge detection. The smaller the value is, more will be detected as edge, which will be preserved.
- useexp=<bool> (default=true)
 Use exp function for coefficient calculation. If set to false, a simplified formula will be used.

Examples

Example: Slightly weak than default
--vpp-pmd apply_count=2,strength=90,threshold=120

--vpp-hqdn3d [<param1>=<value1>[,<param2>=<value2>]...]

HQDN3D spatial and temporal denoise filter. Scratch buffers use FP16 automatically on devices supporting cl_khr_fp16, otherwise FP32 is used.

Parameters
- luma_spatial=<float> (default=4.0, 0-255)
 Spatial denoise strength for luma.
- chroma_spatial=<float> (default=3.0, 0-255)
 Spatial denoise strength for chroma.
- luma_temporal=<float> (default=6.0, 0-255)
 Temporal denoise strength for luma.
- chroma_temporal=<float> (default=4.5, 0-255)
 Temporal denoise strength for chroma.

Examples

--vpp-hqdn3d luma_spatial=4.0,chroma_spatial=3.0,luma_temporal=6.0,chroma_temporal=4.5

--vpp-anime4k-shader [<param1>=<value1>[,<param2>=<value2>]...]

Run an OpenCL implementation of an Anime4K v3.2 GLSL-style luma enhancement / 2x upscale chain. No model file is required.

parameters
- mode=<string>
 Select from ani4k_original, ani4k_deblur, ani4k_darken_hq, ani4k_thin_hq, ani4k_dog_sharpen, ani4k_dog, ani4k_dtd.
- scale=<int>
 1 refines at source resolution, 2 runs 2x upscale + refine. Some modes imply a fixed scale.
- strength=<float>
 Luma refinement strength.
- prefilter_denoise=<string>, darken=<string>, thin=<string>, denoise=<string>
 Optional pre-denoise, line darken, line thin, and denoise passes. Values are off, mean, median, mode, or hq, fast, veryfast.
- clamp_highlights=<bool>
 Clamp output highlights to the local source maximum.
- antiring=<float>
 Anti-ringing strength. (0.0 - 1.0)
- chroma_resize=<string>
 Chroma resize method for 2x upscale. spline36, bilinear, bicubic, lanczos3, joint.
- chroma=<bool>
 Resize chroma on 2x upscale.
- out_res=<int>x<int>
 Resize to an arbitrary final resolution after Anime4K processing. A negative value on one axis keeps aspect ratio.
- resize=<string> (default: spline16)
 Resampler for out_res.
 lanczos4 / spline16 / spline36 / jinc144 / nis / bicubic / ...

--vpp-lenscorrection [<param1>=<value1>][,<param2>=<value2>],...

Correct radial lens distortion using Brown-Conrady coefficients.

k1=<float>, k2=<float>: radial distortion coefficients.
cx=<float>, cy=<float>: correction centre in normalized image coordinates (default: 0.5).

--vpp-lenscorrection k1=-0.20,k2=0.04

--vpp-v360 [<param1>=<value1>][,<param2>=<value2>],...

Convert between equirect, flat, and cubemap projections.

in=<string>, out=<string>: input/output projection: equirect / flat / cubemap.
yaw=<float>, pitch=<float>, roll=<float>: view rotation in degrees.
h_fov=<float>: horizontal field of view for flat output.
w=<int>, h=<int>: output resolution.

--vpp-v360 in=equirect,out=flat,yaw=30,pitch=0,h_fov=90,w=1920,h=1080

--vpp-onnx [<param1>=<value1>[,<param2>=<value2>]...]

Experimental CNN filter that runs the specified ONNX model on GPU through ONNX Runtime DirectML. Available only in Windows builds with DirectML support.

parameters
- model=<string> / modelfile=<string>
 ONNX model file path, or registered model name in models.json when --vpp-onnx-model-dir is specified. If a registered model has "fp32": true in models.json and prec=auto, VCEEnc automatically uses prec=fp32.
- device=<string>
 Compatibility parameter. DirectML binds inference to the same GPU as the encoder.
- colormatrix=<string>
 Accepts the same names as --colormatrix. --vpp-onnx supports auto, auto_res, smpte170m, bt470bg, bt709, bt2020nc.
- colormatrix_out=<string>
 Output-side RGB to YUV color matrix. Accepts the same names as colormatrix. auto uses the same matrix as colormatrix. Use bt2020nc for SDR-to-HDR models that output BT.2020/PQ RGB.
- colorrange=<string>
 Accepts the same names as --colorrange. --vpp-onnx supports auto, tv, limited, pc, full.
- colorspace=<string>
 Input color space for 3-channel models. rgb, ycbcr.
- prec=<string>
 Inference precision. auto, fp16, fp32.
- noise=<int>
 Sigma value passed to noise models. (0 - 255)
- frames=<int> (default: 1)
 Temporal window size for models with T*3 RGB input channels and 3 output channels. Specify a positive odd number so that the output corresponds to the centre frame. For registered models with frames set in models.json, the registry value takes precedence.
- mask=<string>
 Grayscale mask image for a two-input ONNX model. White pixels are processed and black pixels are retained. This is intended for static masks such as logo or watermark removal.
- out_res=<int>x<int>, resize=<string>
 Resize to an arbitrary final resolution after network processing. A negative value on one axis keeps aspect ratio.
Registered models can specify "colormatrix_out": "bt2020nc" in models.json. When colormatrix_out=auto, VCEEnc uses the registered output matrix.

Example:
```
--vpp-onnx model=hdrtvnetpp_agcm_dynamic,colormatrix=bt709 --output-depth 10 --colormatrix bt2020nc --colorprim bt2020 --transfer smpte2084
```

--vpp-onnx-deint [<param1>=<value1>][,<param2>=<value2>],...

ONNX model based deinterlacing through ONNX Runtime DirectML. Select a registered model from onnx_deint_models.json; direct model paths are not accepted. The manifest architecture selects the ST-DeInt or DDD tensor layout.

mode=bob emits two progressive frames and doubles the frame rate, while mode=normal emits the first field in display order. TFF/BFF order is preserved. Progressive input bypasses neural inference. Input must be 8-bit YUV420 with an even height of at least four.

parameters
- model=<string> (required)
 Registered name in onnx_deint_models.json under --vpp-onnx-model-dir.
- device=<string> (default: GPU.0)
 Compatibility parameter. DirectML uses the same GPU as the encoder.
- precision=<string> (default: fp32)
 fp32 / auto. DirectML uses the model-authored fp32 precision for both values.
- mode=<string> (default: bob)
 bob / normal.
- colormatrix=<string> (default: auto)
 auto / auto_res / bt709 / smpte170m / bt470bg / bt2020nc.
- colorrange=<string> (default: auto)
 auto / limited (tv) / full (pc).

ST-DeInt and DDD models are not included in release archives. Verify their rights and licenses, then generate onnx_deint_models.json with run_all.py from HWEnc-onnx-models.

--vpp-onnx-model-dir C:\models\HWEnc-onnx-models
--vpp-onnx-deint model=stdeint,mode=bob,precision=fp32
--vpp-onnx-deint model=DDD,mode=normal,precision=auto

--vpp-onnx-model-dir <string>

Directory containing models.json and the model files for registered ONNX models.

--vpp-rife-ov [<param1>=<value1>][,<param2>=<value2>],...

RIFE v4.x frame interpolation filter using ONNX Runtime DirectML. Input must be 8-bit YUV420 and its width and height must be multiples of 32. Available only in Windows builds with DirectML support.

parameters
- model=<string>
 Registered RIFE v4.x model name or path to an ONNX model (required). When --vpp-onnx-model-dir is specified, a name from rife_ov_models.json such as rife_v4_6 can be used. Values containing /, \\, or . are treated as direct paths for compatibility.
- multi=<int> (default: 2, minimum: 2)
 Frame-rate multiplier.
- device=<string> (default: GPU.0)
 Compatibility parameter. DirectML binds inference to the same GPU as the encoder.
- colormatrix=<string> (default: auto)
 auto / bt601 / bt709 / bt2020.
- colorrange=<string> (default: auto)
 auto / tv / pc.
```
--vpp-onnx-model-dir C:\models\HWEnc-onnx-models --vpp-rife-ov model=rife_v4_6,multi=2
--vpp-rife-ov model=C:\models\rife_v4.6.onnx,multi=2
```

--vpp-descale [<param1>=<value1>[,<param2>=<value2>]...]

Undo upscaling by solving the inverse system for a known upscaler kernel and output a lower native resolution.

Parameters
- kernel=<string>
 Upscaler kernel to invert. Default: bicubic.
```
bilinear, bicubic, spline16, spline36, spline64, lanczos2, lanczos3, lanczos4, auto
```
- width=<int> / height=<int>
 Target native resolution. Specify both for an explicit kernel.
- b=<float>, c=<float>
 Bicubic parameters. Default: b=0.0, c=0.5.
- src_left=<float>, src_top=<float>
 Source sub-pixel offsets. Default: 0.0.
- src_width=<float>, src_height=<float>
 Fractional active source width/height for sources whose native size is not integer. Default: 0.0 (off).
- border_handling=<string>
 Border extension mode. Default: mirror.
```
mirror, zero, repeat
```
- auto=<bool>
 Enable kernel=auto and native resolution search. This opens the input separately and analyzes detect_frames frames, so stdin and pipes are unsupported.
- search_min=<int>, search_max=<int>, search_step=<int>
 Search range and fine step for auto=true. Default search_step: 1.
- detect_frames=<int>
 Number of frames averaged by auto detection. Default: 10.
- show_scores=<bool>
 Log per-candidate auto-detection scores. Default: false.

Examples

--vpp-descale kernel=bicubic,width=1280,height=720,b=0,c=0.5
--vpp-descale auto=true,detect_frames=8

--vpp-preprocess [<param1>=<value1>[,<param2>=<value2>]...]

JND based edge-adaptive denoising filter that helps the encoder to achieve better coding efficiency. This filter aims at removing bit-expensive high frequency details that are not important for the human visual system. Supports 8bit only (not available for 10bit).

Parameters
- strength=<int> (default: 4, range 0 - 10)
 Strength of filter. The higher the strength, the stronger the filtering.
- sensitivity=<int> (default: 4, range 0 - 10)
 Sensitivity of edges detection. The higher the value, the more likely edges will be detected, and less likely filtering will occur.
- adapt-filter=<bool> (default: %s)
 Enable adaptive filtering.

--vpp-subburn [<param1>=<value1>[,<param2>=<value2>]...]

"Burn in" specified subtitle to the video. Text type subtitles will be rendered by libass.

Parameters
- track=<int>
 Select subtitle track of the input file to burn in, track count starting from 1. Available when --avhw or --avsw is used.
- filename=<string>
 Select subtitle file path to burn in.
- charcode=<string>
 Specify subtitle charcter code to burn in, for text type sub.
- shaping=<string>
 Rendering quality of text, for text type sub.
 - simple
 - complex (default)
- scale=<float> (default=0.0 (auto))
 scaling multiplizer for bitmap fonts.
- transparency=<float> (default=0.0, 0.0 - 1.0)
 adds additional transparency for subtitle.
- brightness=<float> (default=0.0, -1.0 - 1.0)
 modifies brightness of the subtitle.
- contrast=<float> (default=1.0, -2.0 - 2.0)
 modifies contrast of the subtitle.
- vid_ts_offset=<bool>
 add timestamp offset to match the first timestamp of the video file (default on)　　 Please note that when "track" is used, this options is always on.
- ts_offset=<float> (default=0.0)
 add offset in seconds to the subtitle timestamps (for debug perpose).
- fontsdir=<string>
 directory with fonts used.
- forced_subs_only=<bool>
 render forced subs only (default: off).

examples

Example1: burn in subtitle from the track of the input file
--vpp-subburn track=1

Example2: burn in PGS subtitle from file
--vpp-subburn filename="subtitle.sup"

Example3: burn in ASS subtitle from file which charcter code is Shift-JIS
--vpp-subburn filename="subtitle.sjis.ass",charcode=sjis,shaping=complex

--vpp-libplacebo-shader [<param1>=<value1>][,<param2>=<value2>],...

Apply custom shaders in the specified path using libplacebo.

Parameters
- shader=<string>
 Target shader file path. (glsl file)
- <name>=<value>
 Replace the value of #define <name> ... in the shader before it is parsed. This is a shader-source (compile-time) parameter and may be specified multiple times. It is separate from custom= parameters.
- custom=<name>=<value>
 Set a runtime parameter declared with //!PARAM in the shader. libplacebo checks the parameter type and range. This parameter may be specified multiple times.
- res=<int>x<int>
 Output resolution of the filter.
- csp=<string>
 Input CSP passed to libplacebo. yuv444 (default) keeps the current behavior and upsamples to 4:4:4 before shader processing. yuv420 skips this upsampling for 4:2:0 input and lets libplacebo handle chroma processing internally.
```
yuv444, yuv420
```
- colorsystem=<string>
 Color system to use. Default: auto detect.
```
auto, unknown, bt601, bt709, smpte240m, bt2020nc, bt2020c, bt2100pq, bt2100hlg, dolbyvision, ycgco, rgb, xyz, ycgco-re, ycgco-ro
```
- transfer=<string>
 Output transfer function. Default: auto detect.
```
auto, unknown, srgb, bt1886, linear,
gamma18, gamma20, gamma22, gamma24, gamma26, gamma28,
prophoto, st428, pq, hlg, vlog, slog1, slog2
```
- resampler=<string>
 Filter function to use when resample is required. Default: libplacebo-ewa-lanczos.
```
libplacebo-spline16, libplacebo-spline36, libplacebo-spline64, libplacebo-nearest,
libplacebo-bilinear, libplacebo-gaussian, libplacebo-sinc, libplacebo-lanczos, 
libplacebo-ginseng, libplacebo-ewa-jinc, libplacebo-ewa-lanczos, 
libplacebo-ewa-lanczossharp, libplacebo-ewa-lanczos4sharpest, 
libplacebo-ewa-ginseng, libplacebo-ewa-hann, libplacebo-ewa-hanning, 
libplacebo-bicubic, libplacebo-triangle, libplacebo-hermite, libplacebo-catmull-rom, 
libplacebo-mitchell, libplacebo-mitchell-clamp, libplacebo-robidoux, 
libplacebo-robidouxsharp, libplacebo-ewa-robidoux, libplacebo-ewa-robidouxsharp
```
- radius=<float>
 Adjust the function's radius. Default: auto. Must be between 0.0 and 16.0.
- clamp=<float>
 Clamping coefficient for negative weights. Default: 0.0. Must be between 0.0 and 1.0.
- taper=<float>
 Additional taper coefficient. Default: 0.0. Must be between 0.0 and 1.0.
- blur=<float>
 Additional blur coefficient. Default: 0.0. Must be between 0.0 and 100.0.
- antiring=<float>
 Antiringing strength. Default: 0.0. Must be between 0.0 and 1.0.
- linear=<bool>
 Linearize the image before scaling. Default: false.
- sigmoid=<bool>
 Enable sigmoidization during scaling. Default: false. Requires linear=true and is primarily effective on upscaling paths.
- sigmoid_center=<float>
 Sigmoid center parameter. Must be between 0.0 and 1.0. If omitted, libplacebo default (0.75) is used.
- sigmoid_slope=<float>
 Sigmoid slope parameter. Must be between 1.0 and 20.0. If omitted, libplacebo default (6.5) is used.

Examples

Example: Apply a custom shader (1280x720 -> 2560x1440)
--vpp-libplacebo-shader shader=default-shader-pack-2.1.0\Anime4K_Upscale_CNN_x2_L.glsl,res=2560x1440

Example: Set a shader //!PARAM.
--vpp-libplacebo-shader shader=example.glsl,custom=GAIN=1.5

Example: Set a shader #define.
--vpp-libplacebo-shader shader=example.glsl,GAIN=1.5

--vpp-resize <string>

Specify the resizing algorithm.

Parameters

option name	description
auto	auto select
advanced	use high quality scaling
bilinear	linear interpolation
bicubic	bicubic interpolation
spline16	4x4 spline curve interpolation
spline36	6x6 spline curve interpolation
spline64	8x8 spline curve interpolation
lanczos2	4x4 Lanczos resampling
lanczos3	6x6 Lanczos resampling
lanczos4	8x8 Lanczos resampling
fsr1	AMD FidelityFX Super Resolution 1.0 (EASU + RCAS)
amf_bilinear	amf bilinear interpolation
amf_bicubic	amf bicubic interpolation
amf_fsr	amf fsr resampling

Additional parameters for fsr1
- sharpness=<float>
 RCAS sharpness. (0.0 - 1.0, default = 0.5)

examples

Examples: Use fsr1
--vpp-resize algo=fsr1,sharpness=0.8

--vpp-scaler-sharpness <float>

sharpness for amf_fsr. (default=0.5, 0.0-2.0)

--vpp-unsharp [<param1>=<value1>[,<param2>=<value2>]...]

unsharp filter, for edge and detail enhancement.

Parameters
- radius=<int> (default=3, 1-9)
 radius of edge / detail detection.
- weight=<float> (default=0.5, 0-10)
 Strength of edge and detail emphasis. Larger value will result stronger effect.
- threshold=<float> (default=10.0, 0-255)
 Threshold for edge and detail detection.

examples

Example: Somewhat stronger
--vpp-unsharp weight=1.0

--vpp-vinverse [<param1>=<value1>[,<param2>=<value2>]...]

Removes residual combing left after deinterlace.

Parameters
- mode=<vinverse|vinverse2> (default=vinverse)
 Filter mode.
- sstr=<float> (default=2.7, 0.0 - 8.0)
 Strength of the contra reference.
- amnt=<float> (default=255.0, 0.0 - 255.0)
 Maximum per-pixel delta in 8-bit scale. 255.0 disables the cap.
- scl=<float> (default=0.25, 0.0 - 4.0)
 Soft clip scale used when residual and reference difference have opposite signs.
- thr=<float> (default=0.0, 0.0 - 255.0)
 Residual threshold in 8-bit scale. Pixels below this threshold are left unchanged.
- chroma=<bool> (default=true)
 Process chroma planes.

examples

--vpp-vinverse
--vpp-vinverse mode=vinverse2,sstr=2.0,amnt=160,thr=4,chroma=false

--vpp-chromashift [<param1>=<value1>[,<param2>=<value2>]...]

Shift chroma planes to correct chroma/luma alignment.

Parameters
- x=<float> (default=0.0, -4.0 - 4.0)
 Horizontal shift in luma pixels.
- y=<float> (default=0.0, -4.0 - 4.0)
 Vertical shift in luma pixels.
- show=<normal|laplacian> (default=normal)
 Output diagnostic laplacian image.
- auto=<bool> (default=false)
 Detect shift from early frames.
- auto_frames=<int> (default=5, 1-100)
 Number of accepted analysis frames for auto detection.
- auto_min_pairs=<int> (default=200, 10-10000)
 Minimum zero-crossing pairs per analysis frame.

examples

--vpp-chromashift x=1.0,y=-0.5
--vpp-chromashift auto=true,auto_frames=5
--vpp-chromashift show=laplacian

--vpp-deblock [<param1>=<value1>[,<param2>=<value2>]...]

H.264 non-strong style spatial deblocking filter. This is a VPP filter applied to the input image, and is separate from the encoder-side --no-deblock option.

Parameters
- qp=<int> (default=24, 0-51)
 QP used for filter strength.
- alpha=<int> (default=0, -6 - 6)
 Alpha offset.
- beta=<int> (default=0, -6 - 6)
 Beta offset.
- chroma=<bool> (default=false)
 Apply to planar chroma planes as well. Disabled for semi-planar chroma such as NV12/P010.

examples

--vpp-deblock
--vpp-deblock qp=30,alpha=2,beta=2,chroma=true

--vpp-deflicker [<param1>=<value1>[,<param2>=<value2>]...]

Temporal filter to stabilize frame-to-frame brightness flicker statistically.

Parameters
- strength=<float> (default=1.0, 0.0-1.0)
 Blend strength of the correction.
- damping=<float> (default=0.8, 0.0-1.0)
 Temporal damping using the previous frame's correction.
- scene_threshold=<float> (default=2.0, 0.5-5.0)
 Scene change detection threshold. Detected frames pass through without correction.
- frames=<int> (default=30, 5-300)
 Rolling frame count used for reference statistics.
- predictor=<bool> (default=true)
 Use a two-pass predictor-corrector refinement.
- chroma=<bool> (default=false)
 Apply correction to chroma planes as well.

examples

--vpp-deflicker
--vpp-deflicker strength=0.8,damping=0.9,frames=60,predictor=false,chroma=true

--vpp-stab [<param1>=<value1>[,<param2>=<value2>]...]

OpenCL camera-shake stabilizer that estimates frame-to-frame translation from the luma plane using phase correlation and warps the frame to compensate. This is separate from the MFX --vpp-image-stab filter.

Parameters
- strength=<float> (default=1.0, 0.0-1.0)
 Correction strength. 0.0 disables compensation, 1.0 applies the estimated shift fully.
- damping=<float> (default=0.9, 0.0-1.0)
 Temporal smoothing of the detected shift. Higher values make the trajectory more gradual.
- trust=<float> (default=0.3, 0.0-1.0)
 Trust threshold for the correlation peak. Frames below the threshold keep the previous trusted correction.
- max_shift=<float> (default=32.0, 1.0-256.0)
 Maximum per-frame correction in luma pixels.
- border=<black|clamp|mirror> (default=black)
 Border fill mode for pixels sampled from outside the source frame.

examples

--vpp-stab
--vpp-stab strength=0.8,damping=0.95,trust=0.25,max_shift=48,border=mirror

--vpp-colorfix [<param1>=<value1>[,<param2>=<value2>]...]

Corrects color cast and white balance.

Parameters
- mode=<manual|auto|gray> (default=manual)
 Correction mode. manual uses the specified white/black points, auto analyzes chroma averages, and gray uses a grayworld assumption.
- space=<auto|rgb|yuv> (default=auto)
 Working color space. auto selects a space from the mode.
- matrix=<auto|bt601|bt709|bt2020> (default=auto)
 RGB/YUV conversion matrix. auto uses input VUI and resolution fallback.
- white=<rrggbb> (default=ffffff)
 White point for manual mode.
- black=<rrggbb> (default=000000)
 Black point for manual mode.
- frames=<int> (default=30, 10-5000)
 Number of analysis frames for auto/gray modes.
- strength=<float> (default=1.0, 0.0-1.0)
 Correction strength for auto/gray modes.
- variance_threshold=<float> (default=2.0, >0)
 Variance threshold to exclude flash/fade frames from analysis.

examples

--vpp-colorfix
--vpp-colorfix white=fff6e8,black=050505
--vpp-colorfix mode=gray,frames=30,strength=0.7

--vpp-dehalo [<param1>=<value1>[,<param2>=<value2>]...]

Halo removal filter. Applies correction to luma and copies chroma unchanged.

Parameters
- mode=<string> (default=legacy, legacy|alpha)
 Filter mode. legacy keeps the previous implementation, alpha uses the high-precision halo detection path.
- rx=<float> (default=2.0, 0.5 - 10.0)
 Horizontal halo radius.
- ry=<float> (default=2.0, 0.5 - 10.0)
 Vertical halo radius.
- darkstr=<float> (default=1.0, 0.0 - 1.0)
 Strength for darkening bright halos.
- brightstr=<float> (default=0.0, 0.0 - 1.0)
 Strength for brightening dark halos.
- lowsens=<int> (default=50, 0 - 100)
 Lower anchor of the sensitivity ramp.
- highsens=<int> (default=50, 0 - 100)
 Upper anchor of the sensitivity ramp.
- ss=<float> (default=1.5, 1.0 - 4.0)
 Supersampling ratio.
- search_rade=<int> (default=auto, 1 - 10)
 Expand-side search radius for mask generation in mode=alpha. If omitted, uses max(round(max(rx,ry)),3).
- search_radi=<int> (default=search_rade, 1 - 10)
 Inpand-side search radius for mask generation in mode=alpha. If omitted, uses search_rade.

examples

--vpp-dehalo
--vpp-dehalo mode=alpha,rx=2.4,ry=2.0,darkstr=0.8,brightstr=0.1,lowsens=40,highsens=70,ss=1.5,search_rade=3

--vpp-finedehalo [<param1>=<value1>[,<param2>=<value2>]...]

Halo removal filter with a fine-line protection mask. Applies correction to luma and copies chroma unchanged.

Parameters
- mode=<string> (default=alpha, legacy|alpha)
 Internal dehalo mode.
- rx=<float> (default=2.0, 0.5 - 10.0)
 Horizontal halo radius.
- ry=<float> (default=2.0, 0.5 - 10.0)
 Vertical halo radius.
- darkstr=<float> (default=1.0, 0.0 - 1.0)
 Strength for darkening bright halos.
- brightstr=<float> (default=1.0, 0.0 - 1.0)
 Strength for brightening dark halos.
- lowsens=<int> (default=50, 0 - 100)
 Lower anchor of the dehalo sensitivity ramp.
- highsens=<int> (default=50, 0 - 100)
 Upper anchor of the dehalo sensitivity ramp.
- ss=<float> (default=1.5, 1.0 - 4.0)
 Supersampling ratio.
- search_rade=<int> (default=1, 1 - 10)
 Expand-side search radius for the internal dehalo in mode=alpha.
- search_radi=<int> (default=search_rade, 1 - 10)
 Inpand-side search radius for the internal dehalo in mode=alpha. If omitted, uses search_rade.
- thmi=<int> (default=80, 0 - 255)
 Lower threshold of the edge mask.
- thma=<int> (default=128, 0 - 255)
 Upper threshold of the edge mask.
- thlimi=<int> (default=50, 0 - 255)
 Lower threshold of the light edge mask.
- thlima=<int> (default=100, 0 - 255)
 Upper threshold of the light edge mask.
- showmask=<int> (default=0, 0 - 4)
 Debug mask output. 1=outside, 2=shrink, 3=edges, 4=strong.
- excl=<bool> (default=true)
 Enable the exclusion zone around strong and nearby light edges.
- edgeproc=<float> (default=0.0, 0.0 - 1.0)
 Adds the strong edge mask to the outside mask.
- edge=<string> (default=prewitt)
 Edge detector, one of prewitt, sobel, scharr, kirsch, laplacian.

examples

--vpp-finedehalo
--vpp-finedehalo edge=scharr,thmi=60,thma=160,thlimi=30,thlima=120,showmask=4

--vpp-hqdering [<param1>=<value1>[,<param2>=<value2>]...]

DCT ringing reduction filter. Applies correction to luma by default.

Parameters
- mrad=<int> (default=1, 1 - 3)
 Ring mask expansion radius.
- mthr=<int> (default=10, 0 - 255)
 Edge mask threshold.
- sigma=<float> (default=1.5, 0.5 - 5.0)
 Gaussian blur sigma.
- showmask=<bool> (default=false)
 Output the effective mask only.
- protect=<bool> (default=true)
 Protect original edge pixels.
- edge=<string> (default=log)
 Edge detector, one of log, sobel, prewitt, scharr, kirsch, laplacian.
- thr=<int> (default=0)
 Limit for the change per pixel in 8-bit scale. 0 disables the limit.
- elast=<float> (default=2.0, 1.0 - 3.0)
 Elastic falloff for thr.
- darkthr=<int> (default=-1)
 Separate limit for darkening. -1 follows thr.
- minp=<int> (default=0, 0 - 3)
 Edge-core inpand iterations excluded from the ring mask.
- msmooth=<int> (default=0, 0 - 3)
 Ring mask smoothing iterations.
- drrep=<int> (default=0)
 Repair blurred clip. 0=off, 1=clamp to the source 3x3 min/max.
- sharp=<int> (default=0, 0 - 3)
 Contra-sharpening level. Restores line strength lost to blur without reintroducing ringing.
- planes=<string> (default=y)
 Target planes. all, or :-separated list of y, u, v.

examples

--vpp-hqdering
--vpp-hqdering mrad=2,mthr=12,sigma=2.0,protect=true,edge=scharr

--vpp-edgelevel [<param1>=<value1>[,<param2>=<value2>]...]

Edge level adjustment filter, for edge sharpening.

Parameters
- strength=<float> (default=5.0, -31 - 31)
 Strength of edge sharpening. Larger value will result stronger edge sharpening.
- threshold=<float> (default=20.0, 0 - 255)
 Noise threshold to avoid enhancing noise. Larger value will treat larger luminance change as noise.
- black=<float> (default=0.0, 0-31)
 strength to enhance dark part of edges.
- white=<float> (default=0.0, 0-31)
 strength to enhance bright part of edges.

examples

Example: Somewhat stronger (Aviutl version default)
--vpp-edgelevel strength=10.0,threshold=16.0,black=0,white=0

Example: Strengthening the black part of the outline
--vpp-edgelevel strength=5.0,threshold=24.0,black=6.0

--vpp-msharpen [<param1>=<value1>[,<param2>=<value2>]...]

Edge-selective sharpening filter based on Donald A. Graft's MSharpen.

Parameters
- strength=<float> (default=1.0, 0.0 - 1.0)
 Sharpening strength.
- threshold=<float> (default=15.0, 0.0 - 255.0)
 Edge detection threshold.
- slope=<float> (default=0.0, 0.0 -)
 Slope of the sigmoid soft mask. 0.0 keeps the legacy binary mask.
- luma_limit=<float> (default=0.0, 0.0 - 255.0)
 Reduces sharpening in luma areas darker than this value. 0.0 disables it.
- block_protect=<float> (default=0.0, 0.0 - 1.0)
 Reduces sharpening near detected DCT block boundaries. 0.0 disables it.
- highq=<bool> (default=true)
 When true, uses 4-direction edge detection (diagonal + horizontal/vertical). When false, uses only 2 diagonal directions.
- mask=<bool> (default=false)
 When true, outputs edge mask instead of sharpened result (for debugging).

examples

Example: Default settings
--vpp-msharpen

Example: Somewhat weaker
--vpp-msharpen strength=0.5,threshold=20.0

Example: Use soft mask, dark luma attenuation, and block protection
--vpp-msharpen strength=0.8,threshold=18.0,slope=8.0,luma_limit=32.0,block_protect=0.5

--vpp-cas [<param1>=<value1>[,<param2>=<value2>]...]

Contrast Adaptive Sharpening filter. Applies CAS to luma by default.

Parameters
- sharpness=<float> (default=0.4, 0.0 - 1.0)
 Sharpening strength. Internally maps to the CAS peak value.
- hdr=<bool> (default=false)
 Skips the SDR gamma 2.0 luma approximation. Enable this for HDR sources such as PQ or HLG.
- chroma=<bool> (default=false)
 Also sharpen chroma planes.

examples

Example: Default settings
--vpp-cas

Example: Stronger sharpening
--vpp-cas sharpness=0.7

Example: HDR source
--vpp-cas sharpness=0.5,hdr=true

--vpp-warpsharp [<param1>=<value1>[,<param2>=<value2>]...]

Edge warping (sharpening) filter.

Parameters
- threshold=<float> (default=128.0, 0 - 255)
 Threshold used when detencting edges. Raising this value will result stronger sharpening.
- blur=<int> (default=2)
 Number of times to blur. More times of blur will result weaker sharpening.
- type=<int> (default=0)
 - 0 ... use 13x13 size blur.
 - 1 ... use 5x5 size blur. This results higher quality, but requires more blur counts.
- depth=<float> (default=16.0, -128.0 - 128.0)
 Depth of warping, raising this value will result stronger sharpening.
- chroma=<int> (default=0)
 Select how to process chroma channels.
 - 0 ... Use luma based mask to process hcroma channels.
 - 1 ... Create individual mask for each chroma channels.
- depth_min=<float> (default=same as depth, -128.0 - 128.0)
 Warp depth used on weak edge mask pixels. This may be larger than depth_max to reduce warp on strong edges.
- depth_max=<float> (default=same as depth, -128.0 - 128.0)
 Warp depth used on strong edge mask pixels.
- edge_thr=<float> (default=192.0, 1.0 - 255.0)
 Edge mask value, in 8-bit scale, where adaptive depth reaches depth_max.
- gamma=<float> (default=1.0, 0.01 - 8.0)
 Response curve for adaptive depth. Values below 1.0 increase the effect on weak edges, values above 1.0 focus the effect on strong edges.

examples

Example: Using type 1.
--vpp-warpsharp threshold=128,blur=3,type=1

Example: Adaptive depth.
--vpp-warpsharp depth=8,depth_min=4,depth_max=12,edge_thr=192,gamma=0.7

--vpp-detailsharpen [<param1>=<value1>[,<param2>=<value2>]...]

Sharpening filter for fine detail enhancement. It boosts texture and low-amplitude detail while suppressing strong enhancement on large edges.

Parameters
- z=<float> (default=4.0, 0.001 - 64.0)
 Zero point. Larger values treat smaller luminance differences more weakly.
- sstr=<float> (default=1.5, 0.0 - 16.0)
 Strength of enhancement. Larger values boost details more strongly.
- power=<float> (default=4.0, 1.0 - 16.0)
 Exponent for nonlinear enhancement. Larger values prioritize mid-amplitude detail.
- ldmp=<float> (default=1.0, 0.0 - 1000.0)
 Low-amplitude damping. Larger values suppress tiny changes close to noise.
- mode=<int> (default=1, 0 - 1)
 Blur type. 0 uses 3x3 Gauss, and 1 uses 3x3 Box.
- med=<bool> (default=false)
 Apply an additional 3x3 median to the blurred image.

examples

Example: Default settings
--vpp-detailsharpen

Example: Gauss blur and median with slightly stronger enhancement
--vpp-detailsharpen z=3,sstr=2.0,power=3,mode=0,med=true

--vpp-maa [<param1>=<value1>[,<param2>=<value2>]...]

Masked anti-aliasing for animated content (anime, cel-shaded). This combines directional 9-cost AA with edge masking to anti-alias diagonal lines without damaging non-edge content.

Parameters
- ss=<float> (default=2.0, 1.0 - 4.0)
 Supersample factor.
- aa=<int> (default=48, 0 - 255)
 Luma AA strength.
- aac=<int> (default=aa-8, 0 - 255)
 Chroma AA strength. Only used when chroma=on.
- mask=<bool> (default=on)
 Enable edge mask.
- mthresh=<int> (default=7, 1 - 255)
 Edge threshold. Higher values treat fewer pixels as edges.
- chroma=<bool> (default=off)
 Process chroma planes. This is approximately 50-100% slower.
- show=<int> (default=0)
 Debug overlay mode. 0=normal, 1=mask only, 2=mask+AA.
- edge=<string> (default=sobel)
 Edge operator. Select from sobel, prewitt, sobel_full, scharr, kirsch, laplacian.

examples

Example: Default settings
--vpp-maa

Example: Stronger luma AA with edge mask
--vpp-maa aa=64,mthresh=8

Example: Use Scharr edge detection
--vpp-maa edge=scharr

--vpp-enhance [<param1>=<value1>][,<param2>=<value2>][...]

Parameters
- attenuation=<float> (default: 0.1, range 0.02 - 0.4)
- radius=<int> (default: 2, range 1 - 4)

--vpp-softlight [<param1>=<value1>][,<param2>=<value2>],...

Neutralize color casts, normalize lightness, or boost contrast/saturation using whole-frame statistics.

Parameters
- mode=<string> (default=neutralize)
 - neutralize: neutralize color cast while preserving original brightness.
 - lightness: normalize brightness while preserving original hue and saturation.
 - neutralize_boost_sat: neutralize color cast and boost saturation.
 - neutralize_full: neutralize color and brightness without restoring brightness.
 - neutralize_boost: neutralize_full plus RGB contrast boost.
 - boost: apply RGB contrast boost only.
 - saturation: apply saturation boost only.
- formula=<string> (default=pegtop)
 - pegtop
 - illusionshu
 - w3c
- skipblack=<bool> (default=false)
 Exclude pure black pixels from the average, useful for sources with letterbox areas.

examples

Example:
--vpp-softlight
--vpp-softlight mode=lightness
--vpp-softlight mode=boost,formula=w3c
--vpp-softlight mode=neutralize,skipblack=true

--vpp-curves [<param1>=<value1>][,<param2>=<value2>],...

Apply color adjustments using curves.

Parameters
- preset=<float>
 - none
 - color_negative
 - process
 - darker
 - lighter
 - increase_contrast
 - linear_contrast
 - medium_contrast
 - strong_contrast
 - negative
 - vintage
- m=<string>
 Set master curve points, post process for luminance.
- r=<string>
 Set curve points for red. Will override preset settings.
- g=<string>
 Set curve points for green. Will override preset settings.
- b=<string>
 Set curve points for blue. Will override preset settings.
- all=<string>
 Set curve points for r,g,b when not specified. Will override preset settings.
- interp=<string> (default=spline)
 Interpolation method. spline uses natural cubic spline, pchip uses monotone cubic interpolation that avoids overshoot between points.

Examples

Example:
--vpp-curves r="0/0.11 0.42/0.51 1/0.95":g="0/0 0.50/0.48 1/1":b="0/0.22 0.49/0.44 1/0.8"

--vpp-tweak [<param1>=<value1>[,<param2>=<value2>]...]

Parameters
- brightness=<float> (default=0.0, -1.0 - 1.0)
- contrast=<float> (default=1.0, -2.0 - 2.0)
- gamma=<float> (default=1.0, 0.1 - 10.0)
- saturation=<float> (default=1.0, 0.0 - 3.0)
- hue=<float> (default=0.0, -180 - 180)
- coring=<bool> (default=false)
- start_hue=<float> (default=0.0, 0.0 - 360.0)
- end_hue=<float> (default=360.0, 0.0 - 360.0)
 Limit hue/saturation adjustment to the hue angle range.
- swapuv=<bool> (default=false)
- y_offset=<float> (default=0.0, -1.0 - 1.0)
- y_gain=<float> (default=1.0, -2.0 - 2.0)
- cb_offset=<float> (default=0.0, -1.0 - 1.0)
- cb_gain=<float> (default=1.0, -2.0 - 2.0)
- cr_offset=<float> (default=0.0, -1.0 - 1.0)
- cr_gain=<float> (default=1.0, -2.0 - 2.0)
- r_offset=<float> (default=0.0, -1.0 - 1.0)
- r_gain=<float> (default=1.0, -2.0 - 2.0)
- r_gamma=<float> (default=1.0, 0.1 - 10.0)
- g_offset=<float> (default=0.0, -1.0 - 1.0)
- g_gain=<float> (default=1.0, -2.0 - 2.0)
- g_gamma=<float> (default=1.0, 0.1 - 10.0)
- b_offset=<float> (default=0.0, -1.0 - 1.0)
- b_gain=<float> (default=1.0, -2.0 - 2.0)
- b_gamma=<float> (default=1.0, 0.1 - 10.0)

examples

Example:
--vpp-tweak brightness=0.1,contrast=1.5,gamma=0.75

--vpp-deband [<param1>=<value1>[,<param2>=<value2>]...]

Parameters
- range=<int> (default=15, 0-127)
 Blur range. Samples to be used for blur are taken from pixels within this range.
- sample=<int> (default=1, 0-2)
 - sample = 0 Processing is performed by referring a pixel within "range".
 - sample = 1 Blur processing is performed by referring total of 2 pixels, a pixel within "range" and its point symmetric pixel.
 - sample = 2 Blur processing is performed by referring total of 4 pixels including 2 pixels within "range" and their point symmetric pixels.
- thre=<int> (set same threshold for y, cb & cr)
- thre_y=<int> (default=15, 0-31)
- thre_cb=<int> (default=15, 0-31)
- thre_cr=<int> (default=15, 0-31)
 Threshold for y, cb, cr blur. If this value is high, the filter will be stronger, but thin lines and edges are likely to disappear.
- dither=<int> (set same dither for y & c)
- dither_y=<int> (default=15, 0-31)
- dither_c=<int> (default=15, 0-31)
 Dither strength of y & c.
- seed=<int>
 Change of random number seed. (default = 1234)
- blurfirst (default=off)
 Stronger effect could be expected, by processing blur first. However side effects may also become stronger, which might make thin lines to disappear.
- rand_each_frame (default=off)
 Change the random number used by the filter every frame.
- keep_tv_range=<bool> (default=off)
 Clamp output to TV range, scaled by bit depth (Y: 16-235, Cb/Cr: 16-240).

examples

Example:
--vpp-deband range=31,dither=12,rand_each_frame

--vpp-libplacebo-deband [<param1>=<value1>][,<param2>=<value2>],...

Deband filter by libplacebo.

Parameters
- iterations=<int>
 iterations (default=1, 0-)
- threshold=<float>
 cut-off threshold (default=4.0, 0-)
- radius=<float>
 initial radius (default=16.0, 0-)
- grain_y=<float>
 extra noise for luma (default=6.0, 0-)
- grain_c=<float>
 extra noise for chroma (default=grain_y, 0-)
- dither=<string>
 dither mode, only for 8bit.
 - none
 - blue_noise (default)
 - ordered_lut
 - ordered_fixed
 - white_noise
- lut_size=<int>
 size of LUT. (default=64) 2, 4, 8, 16, 32, 64, 128, 256

Examples

Example:
--vpp-libplacebo-deband iterations=1,radius=32

--vpp-pad <int>,<int>,<int>,<int>

add padding to left,top,right,bottom (in pixels)

--vpp-frc [<param1>=<value1>][,<param2>=<value2>],...

Frame rate conversion filter.

Parameters
- profile=<string>
 Set the profile for frame rate conversion.
 - low
 - high (default)
 - super
- search=<string>
 - native (default)
 - performance

examples

--vpp-frc profile=super,search=native,blend=false

--vpp-overlay [<param1>=<value1>][,<param2>=<value2>],...

Overlay image on top of base video.

Parameters
- file=<string>
 source file path of the image. When video is used for file, video framerate should be equal to base video file.
- pos=<int>x<int>
 position to add image.
- size=<int>x<int>
 size of image.
- alpha=<float> (default: 1.0 (0.0 - 1.0))
 alpha value of overlay.
- alpha_mode=<string>
 - override ... set value of alpha
 - mul ... multiple original value
 - lumakey ... set alpha depending on luma
- lumakey_threshold=<float> (default: 0.0 (dark: 0.0 - 1.0 :bright))
 luma used for tranparency.
- lumakey_tolerance=<float> (default: 0.1 (0.0 - 1.0))
 set luma range to be keyed out.
- lumakey_softness=<float> (default: 0.0 (0.0 - 1.0))
 set the range of softness for lumakey.

examples

--vpp-overlay file=logo.png,pos=1620x780,size=300x300
--vpp-overlay file=logo.mp4,pos=0x800,alpha_mode=lumakey,lumakey_threshold=0.0,lumakey_tolerance=0.1

--vpp-perf-monitor

Print processing time for each filter enabled. This is meant for profiling purpose only, please note that when this option is enabled, overall performance will decrease as the application waits each filter to finish when checking processing time of them.

Other Options

--parallel [<int>] or [<string>]

Enables parallel encoding by file splitting. Divides the input file into multiple chunks and encodes them in parallel using separate threads to accelerate processing.

Restrictions Parallel encoding will be automatically disabled in the following cases:
- Input is from pipe
- Input is not seekable
- Frame timestamps are unstable
- No encoding is performed (-c raw)
- --dynamic-rc is enabled
- --trim option is enabled
- --timecode option is specified
- --tcfile-in option is specified
- --keyfile option is specified
- --key-on-chapter option is enabled
- ssim/psnr/vmaf is enabled
- --vpp-subburn (subtitle burn-in) is specified
- --vpp-fruc (frame interpolation) is enabled

Examples

Example: Auto-determine number of parallel processes
--parallel auto

Example: Run with 3 parallel threads
--parallel 3

--parallel-force-large-memory-filters

Disables an automatic --parallel count limit when one is applied for filters with high GPU memory usage.

Use this only when enough GPU memory is available, as it can increase the risk of GPU memory allocation errors or performance drops.

--output-buf <int>

Specify the output buffer size in MB. The default is 8 and the maximum value is 128.

The output buffer will store output data until it reaches the buffer size, and then the data will be written at once. Higher performance and reduction of file fragmentation on the disk could be expected.

On the other hand, setting too much buffer size could decrease performance, since writing such a big data to the disk will take some time. Generally, leaving this to default should be fine.

If a protocol other than "file" is used, then this output buffer will not be used.

--output-thread <int>

Specify whether to use a separate thread for output. Using output thread increases memory usage, but sometimes improves encoding speed.

parameters
- -1 ... auto (default)
- 0 ... do not use output thread
- 1 ... use output thread

--log <string>

Output the log to the specified file.

--log-level [<param1>=]<value>[,<param2>=<value>]...

Select the level of log output.

level
- error ... Display only errors
- warn ... Show errors and warnings
- info ... Display general encoding information (default)
- debug ... Output additional information, mainly for debug
- trace ... Output information for each frame (slow)
Target
Target category of logs. Will be handled as all when omitted.
- all ... Set all targets.
- app ... Set all targets, except libav, libass, perfmonitor, amf.
- device ... Device initialization.
- core ... Application core logs, including core_progress and core_result
- core_progress ... Progress indicator
- core_result ... Encode result
- parallel ... Parallel
- gpu_select ... GPU auto select
- decoder ... decoder logs
- input ... File input logs
- output ... File output logs
- vpp ... logs of vpp fitlers
- amf ... logs ofamf library
- opencl ... logs ofopencl
- libav ... internal logs of libav library
- libass ... logs of ass library
- perfmonitor ... logs of perf monitoring

Examples

Example: Enable debug messages
--log-level debug

Example: Show only application debug messages
--log-level app=debug

Example: Show progress only
--log-level error,core_progress=info

--log-opt <param1>=<value>[,<param2>=<value>]...

additional options for log output.

parameters
- addtime (default=off)
  Add time of to each line of the log.
- addlevel (default=off)
  Show loglevel to each line of the log.
- color (default=on) Enable/disable log color.

--log-framelist [<string>]

FOR DEBUG ONLY! Output debug log for avsw/avhw reader.

--log-packets [<string>]

FOR DEBUG ONLY! Output debug log for packets read in avsw/avhw reader.

--log-mux-ts [<string>]

FOR DEBUG ONLY! Output debug log for packets written.

--thread-affinity [<string1>=]{<string2>[#<int>[:<int>][]...] or 0x<hex>}

Set thread affinity to the process or threads of the application.

target (<string1>) Set target of which thread affinity will be set. Default is "all".
- all ... All targets below.
- process ... whole process.
- main ... main thread
- decoder ... avhw decode thread
- csp ... colorspace conversion threads (CPU)
- input ... input thread
- encoder ... background encoder threads
- output ... output thread
- audio ... audio processing threads
- perfmonitor ... performance monitoring threads
- videoquality ... ssim/psnr/vmaf calculation thread
thread affinity (<string2>)
- all ... All cores(no limit)
- pcore ... performance cores (hybrid architecture only)
- ecore ... efficiency cores (hybrid architecture only)
- logical ... logical cores specified by the numbers after "#". (Windows only)
- physical ... physical cores specified by the numbers after "#". (Windows only)
- cachel2 ... cores which share the L2 cache specified by the numbers after "#". (Windows only)
- cachel3 ... cores which share the L3 cache specified by the numbers after "#". (Windows only)
- ... set by 0x (same as "start /affinity")

examples

Example: Set process affinity to physical 0,1,2,5,6 cores
--thread-affinity process=physical#0-2:5:6

Example: Set process affinity to logical 0,1,2,3 cores
--thread-affinity process=0x0f
--thread-affinity process=logical#0-3
--thread-affinity process=logical#0:1:2:3

Example: Set performance monitoring thread to efficiency core on hybrid architecture
--thread-affinity perfmonitor=ecore

Example: Set process affinity to firect CCX on Ryzen CPUs
--thread-affinity process=cachel3#0

--thread-priority [<string1>=]<string2>[#<int>[:<int>][]...]

Set priority to the process or threads of the application. [Windows OS only]

target (<string1>) Set target of which thread priority will be set. Default is "all".
- all ... All targets below.
- process ... whole process
- main ... main thread
- decoder ... avhw decode thread
- csp ... colorspace conversion threads (CPU)
- input ... input thread
- encoder ... background encoder threads
- output ... output thread
- audio ... audio processing threads
- perfmonitor ... performance monitoring threads
- videoquality ... ssim/psnr/vmaf calculation thread
Priority (<string2>)
- background, idle, lowest, belownormal, normal (default), abovenormal, highest

examples

Example: apply belownormal priority to whole process
--thread-priority process=belownormal

Example: apply belownormal priority to output thread, and background priority to performance monitoring threads
--thread-priority output=belownormal,perfmonitor=background

--thread-throttling [<string1>=]<string2>[#<int>[:<int>][]...]

Set power throttling mode to the threads of the application. [Windows OS only]

target (<string1>) Set target of which thread power throttling mode will be set. Default is "all".
- all ... All targets below.
- main ... main thread
- decoder ... avhw decode thread
- csp ... colorspace conversion threads (CPU)
- input ... input thread
- encoder ... background encoder threads
- output ... output thread
- audio ... audio processing threads
- perfmonitor ... performance monitoring threads
- videoquality ... ssim/psnr/vmaf calculation thread
mode (<string2>)
- unset (default) ... mode will be set automatically depending on the encode target.
- auto ... Let OS decide.
- on ... prefer power efficiency.
- off ... prefer performance.

examples

Example: prefer power efficiency in output and performance monitoring threads
--thread-throttling output=on,perfmonitor=on

Example: prefer performance in main and input threads
--thread-throttling main=off,input=off

--option-file <string>

File which containes a list of options to be used. Line feed is treated as a blank, therefore an option or a value of it should not splitted in multiple lines.

--max-procfps <int>

Set the upper limit of transcode speed. The default is 0 (= unlimited).

This could be used when you want to encode multiple stream and you do not want one stream to use up all the power of CPU or GPU.

examples

Example: Limit maximum speed to 90 fps
--max-procfps 90

--lowlatency

Tune for lower transcoding latency, but will hurt transcoding throughput. Not recommended in most cases.

--fallback-bitdepth

When enabled, if all available GPUs do not support 10-bit encoding, the encoder will automatically fall back to 8-bit encoding. If there is at least one GPU that supports 10-bit encoding, that GPU will be selected instead.

--avsdll <string>

Specifies AviSynth DLL location to use. When unspecified, the default AviSynth.dll will be used.

--vsdir <string>

Specifies vapoursynth portable directory to use. Supported on Windows only.

--vpy-assume-script-dir

When using the vpy reader, resolves relative paths in .vpy against the script file's directory instead of the current working directory.

--process-codepage <string> [Windows OS only]

parameters
- utf8
  Use UTF-8 as the codepage of the process. (Default)
- os
  Change the character code of the process to be in the default codepage set in the Operating System.
  
  This shall allow AviSynth scripts using non-ASCII characters with legacy codepage to work again.
  
  When this option is set, a copy of the exe file will be created in the same directory of the original exe file, and the manifest file of the copy will be modified using UpdateResourceW API to switch back code page to the default of the OS, and then the copied exe will be run, allowing us to handle the AviSynth scripts using legacy code page.

--task-perf-monitor

Output rough time consumed for each main thread tasks, including wait time.

--cl-perf-dump <dir>

Write OpenCL kernel performance dumps to the specified directory and automatically generate report.html after encoding.

Report generation requires python. By default, Windows uses py.exe, with python.exe as fallback when needed, and Linux uses python3. python path can be set using --python.

Disassembly is optional. Intel GPU dumps use ocloc, and AMD GPU dumps use Radeon GPU Analyzer (RGA). VCEEnc automatically selects the tool by default. ocloc can be installed with Intel oneAPI into C:\Program Files (x86)\Intel\oneAPI\<version>\bin\ocloc.exe. RGA can be installed with AMD Radeon GPU Analyzer into C:\Program Files\GPUOpen\Radeon GPU Analyzer\rga.exe.

--cl-perf-timeline [<float>]

Use with --cl-perf-dump to collect per-event timeline data and generate timeline.html.

Records the host-side enqueue timing and device-side execution timing of individual kernel launches and memory transfer commands for the specified number of seconds from the start of encoding. Host-device clock correlation is corrected using two-point calibration via clGetDeviceAndHostTimer (OpenCL 2.1).

Default is 10 seconds when the value is omitted. Specifying a negative value collects all events without a time limit (may consume a large amount of memory).

Example: Collect timeline for the first 5 seconds
--cl-perf-dump perf_out --cl-perf-timeline 5

Example: Collect with default 10 seconds
--cl-perf-dump perf_out --cl-perf-timeline

The generated timeline.html is a Canvas 2D based interactive viewer supporting zoom/pan/hover for detailed inspection. It has two sections: host thread lanes and device queue lanes, with host/device correspondence highlighted by matching seq numbers.

--cl-perf-disasm-tool <string>

Use with --cl-perf-dump to select the disassembler passed to cl_perf aggregate.

auto ... automatically select rga for AMD/VCEEnc dumps and ocloc for Intel dumps.
ocloc ... use Intel oneAPI ocloc.
rga ... use AMD Radeon GPU Analyzer.
none ... skip disassembly and generate the report with timing data only.

 all          ... monitor all info
 cpu_total    ... cpu total usage (%)
 cpu_kernel   ... cpu kernel usage (%)
 cpu_main     ... cpu main thread usage (%)
 cpu_enc      ... cpu encode thread usage (%)
 cpu_in       ... cpu input thread usage (%)
 cpu_out      ... cpu output thread usage (%)
 cpu_aud_proc ... cpu aud proc thread usage (%)
 cpu_aud_enc  ... cpu aud enc thread usage (%)
 cpu          ... monitor all cpu info
 gpu_load    ... gpu usage (%)
 gpu_clock   ... gpu avg clock
 vee_load    ... gpu video encoder usage (%)
 gpu         ... monitor all gpu info
 queue       ... queue usage
 mem_private ... private memory (MB)
 mem_virtual ... virtual memory (MB)
 mem         ... monitor all memory info
 io_read     ... io read  (MB/s)
 io_write    ... io write (MB/s)
 io          ... monitor all io info
 fps         ... encode speed (fps)
 fps_avg     ... encode avg. speed (fps)
 bitrate     ... encode bitrate (kbps)
 bitrate_avg ... encode avg. bitrate (kbps)
 frame_out   ... written_frames

--perf-monitor-interval <int>

Specify the time interval for performance monitoring with --perf-monitor in ms (should be 50 or more). The default is 500.