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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 specific 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}}

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