v4l2-ctl

linux

Control video devices. See also: `cam`.

More info →

Options (4)

-A, --list-devicesboolean

List all video devices

Example: v4l2-ctl {{[-A|--list-devices]}}

-d, --deviceboolean

List supported video formats and resolutions of a specific video device

Example: v4l2-ctl --list-formats-ext {{[-d|--device]}} {{path/to/video_device}}

-l, --list-ctrlsboolean

List all video device's controls and their values

Example: v4l2-ctl {{[-l|--list-ctrls]}} {{[-d|--device]}} {{path/to/video_device}}

-c, --set-ctrlboolean

Set the value of a video device control

Example: v4l2-ctl {{[-d|--device]}} {{path/to/video_device}} {{[-c|--set-ctrl]}} {{control_name}}={{value}}

Examples (8)

List all video devices

v4l2-ctl [-A|--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 [-d|--device] path/to/video_device

Get all details of a video device

v4l2-ctl --all [-d|--device] path/to/video_device

Capture a JPEG photo with a specific resolution from video device

v4l2-ctl [-d|--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 [-d|--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 [-l|--list-ctrls] [-d|--device] path/to/video_device

Set the value of a video device control

v4l2-ctl [-d|--device] path/to/video_device [-c|--set-ctrl] control_name=value

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