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

• Set the value of a video device control:

v4l2-ctl --device path/to/video_device --set-ctrl=control_name=value