Мануалы и справочники Linux
v4l2-ctl

Команда v4l2-ctl: опции, ключи и примеры использования

v4l2-ctl

Control video devices. More information: https://manned.org/v4l2-ctl.

  • List all video devices:

v4l2-ctl --list-devices

  • List supported video formats and resolutions of default video device /dev/video0:

v4l2-ctl --list-formats-ext

  • List supported video formats and resolutions of a specific video device:

v4l2-ctl --list-formats-ext --device {{path/to/video_device}}

  • Get all details of a video device:

v4l2-ctl --all --device {{path/to/video_device}}

  • Capture a JPEG photo with a specfic resolution from video device:

v4l2-ctl --device {{path/to/video_device}} --set-fmt-video=width={{width}},height={{height}},pixelformat=MJPG --stream-mmap --stream-to={{path/to/output.jpg}} --stream-count=1

  • Capture a raw video stream from video device:

v4l2-ctl --device {{path/to/video_device}} --set-fmt-video=width={{width}},height={{height}},pixelformat={{format}} --stream-mmap --stream-to={{path/to/output}} --stream-count={{number_of_frames_to_capture}}

  • List all video device's controls and their values:

v4l2-ctl --list-ctrls --device {{/path/to/video_device}}