We have collected the most relevant information on V4l Audio. Open the URLs, which are collected below, and you will find all the info you are interested in.
7.1. Differences between V4L and V4L2 — The Linux …
https://www.kernel.org/doc/html/v4.9/media/uapi/v4l/diff-v4l.html
The V4L audio controls are assumed to range from 0 to 65535 with no particular reset value. The V4L2 API permits arbitrary limits and defaults which can be queried with the ioctls VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL and VIDIOC_QUERYMENU ioctl. For general information about controls see User Controls. 7.1.7. Frame Buffer Overlay
linux - Can v4l2 be used to read audio and video from the ...
https://stackoverflow.com/questions/917060/can-v4l2-be-used-to-read-audio-and-video-from-the-same-device
Even on the client side, everything seems to assume v4l is just video, like ffmpeg's libavdevice. Do I need to have my driver create two separate devices, a v4l2 device and an alsa device? It seems like this makes the job of keeping audio and video in sync much more difficult.
1.5. Audio Inputs and Outputs — The Linux Kernel …
https://www.kernel.org/doc/html/v4.9/media/uapi/v4l/audio.html
Assumed two composite video inputs and two audio inputs exist, there may be up to four valid combinations. The relation of video and audio connectors is defined in the audioset field of the respective struct v4l2_input or struct v4l2_output, where each bit represents the index number, starting at zero, of one audio input or output.
V4L capturing - LinuxTVWiki
https://linuxtv.org/wiki/index.php/V4L_capturing
v4l-ctl for controlling your video card (probably part of the v4l-utils package) mpv for viewing videos (probably part of the mpv package) There are alternatives for each of these (e.g. the older 0.10 series of GStreamer and the libav fork of FFMpeg). You should be able to modify the instructions below to suit your preferences. Choosing formats
Video4Linux (V4L) driver-specific documentation — The ...
https://www.kernel.org/doc/html/v4.12/media/v4l-drivers/index.html
This documentation is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or ...
Now you know V4l Audio
Now that you know V4l Audio, we suggest that you familiarize yourself with information on similar questions.
