Documentation:Modules/v4l
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Video4Linux input (v4l) --v4l-caching <integer> Caching value in ms Caching value for V4L captures. This value should be set in milliseconds. --v4l-vdev <string> Video device name Name of the video device to use. If you don't specify anything, no video device will be used. --v4l-adev <string> Audio device name Name of the audio device to use. If you don't specify anything, no audio device will be used. --v4l-chroma <string> Video input chroma format Force the Video4Linux video device to use a specific chroma format (eg. I420 (default), RV24, etc.) --v4l-fps <float> Framerate Framerate to capture, if applicable (-1 for autodetect). --v4l-samplerate <integer> Samplerate Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100) --v4l-channel <integer> Channel Channel of the card to use (Usually, 0 = tuner, 1 = composite, 2 = svideo). --v4l-tuner <integer> Tuner Tuner to use, if there are several ones. --v4l-norm {3 (Automatic), 2 (SECAM), 0 (PAL), 1 (NTSC)} Norm Norm of the stream (Automatic, SECAM, PAL, or NTSC). --v4l-frequency <integer> Frequency Frequency to capture (in kHz), if applicable. --v4l-audio <integer> Audio Channel Audio Channel to use, if there are several audio inputs. --v4l-stereo, --no-v4l-stereo Stereo (default enabled) Capture the audio stream in stereo. (default enabled) --v4l-width <integer> Width Width of the stream to capture (-1 for autodetect). --v4l-height <integer> Height Height of the stream to capture (-1 for autodetect). --v4l-brightness <integer> Brightness Brightness of the video input. --v4l-colour <integer> Color Color of the video input. --v4l-hue <integer> Hue Hue of the video input. --v4l-contrast <integer> Contrast Contrast of the video input. --v4l-mjpeg, --no-v4l-mjpeg MJPEG (default disabled) Set this option if the capture device outputs MJPEG (default disabled) --v4l-decimation <integer> Decimation Decimation level for MJPEG streams --v4l-quality <integer> Quality Quality of the stream.