v4l2-ctl
Control video devices. More information: https://manned.org/v4l2-ctl.
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List all video devices:
v4l2-ctl --list-devices
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List supported video formats and resolutions of default video device
/dev/video0
:
v4l2-ctl --list-formats-ext
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List supported video formats and resolutions of a specific video device:
v4l2-ctl --list-formats-ext --device {{path/to/video_device}}
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Get all details of a video device:
v4l2-ctl --all --device {{path/to/video_device}}
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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
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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}}
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List all video device's controls and their values:
v4l2-ctl --list-ctrls --device {{path/to/video_device}}
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Set the value of a video device control:
v4l2-ctl --device {{path/to/video_device}} --set-ctrl={{control_name}}={{value}}
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