V4l
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v4l
??
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VLC uses this protocol (or access module) to read data from a device or network. |
module options
--v4l-caching <integer> Caching value in ms
--v4l-vdev <string> Video device name
--v4l-adev <string> Audio device name
--v4l-chroma <string> Video input chroma format
--v4l-fps <float> Framerate
--v4l-samplerate <integer> Samplerate
--v4l-channel <integer> Channel
--v4l-tuner <integer> Tuner
--v4l-norm {3 (Automatic), 2 (SECAM), 0 (PAL), 1 (NTSC)}
Norm
--v4l-frequency <integer> Frequency
--v4l-audio <integer> Audio Channel
--v4l-stereo, --no-v4l-stereo
Stereo (default enabled)
--v4l-width <integer> Width
--v4l-height <integer> Height
--v4l-brightness <integer> Brightness
--v4l-colour <integer> Color
--v4l-hue <integer> Hue
--v4l-contrast <integer> Contrast
--v4l-mjpeg, --no-v4l-mjpeg
MJPEG (default disabled)
--v4l-decimation <integer> Decimation
--v4l-quality <integer> Quality
v4l2
??
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VLC uses this protocol (or access module) to read data from a device or network. |
module options
Video input:
--v4l2-dev <string> Device name
Name of the device to use. If you don't specify anything, /dev/video0
will be used.
--v4l2-standard {0 (Default), 16711680 (SECAM), 255 (PAL), 45056 (NTSC)}
Standard
Video standard (Default, SECAM, PAL, or NTSC).
--v4l2-chroma <string> Video input chroma format
Force the Video4Linux2 video device to use a specific chroma format
(eg. I420 or I422 for raw images, MJPEG for M-JPEG compressed input)
(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY,
I41N, I422, I420, I411, I410, MJPG)
--v4l2-input <integer> Input
Input of the card to use (see debug).
--v4l2-audio-input <integer>
Audio input
Audio input of the card to use (see debug).
--v4l2-io {0 (READ), 1 (MMAP), 2 (USERPTR)}
IO Method
IO Method (READ, MMAP, USERPTR).
--v4l2-width <integer> Width
Force width (-1 for autodetect).
--v4l2-height <integer> Height
Force height (-1 for autodetect).
--v4l2-fps <float> Framerate
Framerate to capture, if applicable (-1 for autodetect).
Audio input:
--v4l2-adev <string> Audio device name
Name of the audio device to use. If you don't specify anything,
"/dev/dsp" will be used for OSS, "hw" for Alsa.
--v4l2-audio-method <integer>
Audio method
Audio method to use: 0 to disable audio, 1 for OSS, 2 for ALSA, 3 for
ALSA or OSS (ALSA is prefered).
--v4l2-stereo, --no-v4l2-stereo
Stereo (default enabled)
Capture the audio stream in stereo. (default enabled)
--v4l2-samplerate <integer>
Samplerate
Samplerate of the captured audio stream, in Hz (eg: 11025, 22050,
44100, 48000)
--v4l2-caching <integer> Caching value in ms
Caching value for V4L2 captures. This value should be set in
milliseconds.
Tuner:
--v4l2-tuner <integer> Tuner id
Tuner id (see debug output).
--v4l2-tuner-frequency <integer>
Frequency
Tuner frequency in Hz or kHz (see debug output)
--v4l2-tuner-audio-mode {0 (Mono), 1 (Stereo), 3 (Primary language (Analog
TV tuners only)), 2 (Secondary language (Analog TV tuners only)), 2 (Second aud
io program (Analog TV tuners only)), 4 (Primary language left, Secondary languag e right)}
Audio mode
Tuner audio mono/stereo and track selection.
Controls:
v4l2 driver controls, if supported by your v4l2 driver.
--v4l2-controls-reset, --no-v4l2-controls-reset
Reset v4l2 controls (default disabled)
Reset controls to defaults provided by the v4l2 driver. (default
disabled)
--v4l2-brightness <integer>
Brightness
Brightness of the video input (if supported by the v4l2 driver).
--v4l2-contrast <integer> Contrast
Contrast of the video input (if supported by the v4l2 driver).
--v4l2-saturation <integer>
Saturation
Saturation of the video input (if supported by the v4l2 driver).
--v4l2-hue <integer> Hue
Hue of the video input (if supported by the v4l2 driver).
--v4l2-black-level <integer>
Black level
Black level of the video input (if supported by the v4l2 driver).
--v4l2-auto-white-balance <integer>
Auto white balance
Automatically set the white balance of the video input (if supported
by the v4l2 driver).
--v4l2-do-white-balance <integer>
Do white balance
Trigger a white balancing action, useless if auto white balance is
activated (if supported by the v4l2 driver).
--v4l2-red-balance <integer>
Red balance
Red balance of the video input (if supported by the v4l2 driver).
--v4l2-blue-balance <integer>
Blue balance
Blue balance of the video input (if supported by the v4l2 driver).
--v4l2-gamma <integer> Gamma
Gamma of the video input (if supported by the v4l2 driver).
--v4l2-exposure <integer> Exposure
Exposure of the video input (if supported by the v4L2 driver).
--v4l2-autogain <integer> Auto gain
Automatically set the video input's gain (if supported by the v4l2
driver).
--v4l2-gain <integer> Gain
Video input's gain (if supported by the v4l2 driver).
--v4l2-hflip <integer> Horizontal flip
Flip the video horizontally (if supported by the v4l2 driver).
--v4l2-vflip <integer> Vertical flip
Flip the video vertically (if supported by the v4l2 driver).
--v4l2-hcenter <integer> Horizontal centering
Set the camera's horizontal centering (if supported by the v4l2
driver).
--v4l2-vcenter <integer> Vertical centering
Set the camera's vertical centering (if supported by the v4l2 driver).
--v4l2-audio-volume <integer>
Volume
Volume of the audio input (if supported by the v4l2 driver).
--v4l2-audio-balance <integer>
Balance
Balance of the audio input (if supported by the v4l2 driver).
--v4l2-audio-mute, --no-v4l2-audio-mute
Mute (default disabled)
Mute audio input (if supported by the v4l2 driver). (default disabled)
--v4l2-audio-bass <integer>
Bass
Bass level of the audio input (if supported by the v4l2 driver).
--v4l2-audio-treble <integer>
Treble
Treble level of the audio input (if supported by the v4l2 driver).
--v4l2-audio-loudness <integer>
Loudness
Loudness of the audio input (if supported by the v4l2 driver).
--v4l2-set-ctrls <string> v4l2 driver controls
Set the v4l2 driver controls to the values specified using a comma
separated list optionally encapsulated by curly braces (e.g.:
{video_bitrate=6000000,audio_crc=0,stream_type=3} ). To list
available controls, increase verbosity (-vvv) or use the v4l2-ctl
application.
Source code
- modules/access/v4l.c (access module)
- modules/access/v4l2.c (access module)
