# v4l2-ctl > Control video devices. > More information: . - 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}}`