1.3 KiB
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 {{[-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}}