Build Options

February 2, 2026 ยท View on GitHub

Some features are enabled using build options or by using app_config.h:

This documentation explains those features and how to modify them.

Available streams

You can define streams that camera application can display using IMG_STREAMS define. For each stream you can define

  • format
  • size
  • frame rate

  1. Open app_config.h.

  2. Change the IMG_STREAMS define for your board:

#define IMG_STREAMS {{UVCL_PAYLOAD_JPEG             ,  224, 224, 30}, \
                     {UVCL_PAYLOAD_UNCOMPRESSED_YUY2, 1280, 720, 10}};
  1. Change the MAX_IMG_FRAME_SIZE define for your board:
#define MAX_IMG_FRAME_SIZE (1280 * 720 * 2)

Constraints on IMG_STREAMS

  • The maximum number of items in IMG_STREAMS is limited to UVCL_MAX_STREAM_CONF_NB, which is set to 8 by default.
  • Possible values for the UVC payload are listed in the uvcl.h file.
  • The stride width of dcmipp must be a multiple of 16. The stride width is calculated as width * dcmipp_capture_format_byte_per_pel. For UVCL_PAYLOAD_JPEG or UVCL_PAYLOAD_FB_JPEG, use a value of 2 for dcmipp_capture_format_byte_per_pel.