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[HELP]: VLC 0.8.6a no audio from v4l capture card - The ...
https://forum.videolan.org/viewtopic.php?t=31235
Now, I have just upgraded our VLC machine/server to FC6 and vlc 0.8.6a. The new machine is a Dell Optiplex GX620 with an Intel ICH7 audio device (with Analog Devices AD1981B chip) on the motherboard. I am trying to take the line out of the Haup. WinTV card into the line in on this audio device, but VLC doesn't seem to pick up the audio.
picamera - Pi Camera V2: ERROR opening V4L interface: No ...
https://raspberrypi.stackexchange.com/questions/115990/pi-camera-v2-error-opening-v4l-interface-no-such-file-or-directory
[ 4.747167] bcm2835_vc_sm_cma_probe: Videocore shared memory driver [ 4.761076] bcm2835_audio bcm2835_audio: card created with 8 channels [ 4.824408] bcm2835_mmal_vchiq: module is from the staging directory, …
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.
[Theora] v4l audio
http://lists.xiph.org/pipermail/theora/2005-December/001050.html
> ffmpeg2theora --v4l /dev/video0 -o test.ogg > > This records video but no audio. Yes. Likewise, the v4l kernel interface only provides video, not audio. > Should I be able to do this? Do I need to stream the audio separately? It would be nice if ffmpeg2theora could also read from the sound card for the audio track, but I don't believe it ...
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