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FFmpeg Devices Documentation
https://ffmpeg.org/ffmpeg-devices.html
Audio sample rate is always 48 kHz and the number of channels can be 2, 8 or 16. Note that all audio channels are bundled in one single audio track. 3.5.1 Options list_devices. If set to true, print a list of devices and exit. Defaults to false. This option is deprecated, please use the -sources option of ffmpeg to list the available input devices.
How can I capture audio AND video simultenaous with …
https://stackoverflow.com/questions/6311560/how-can-i-capture-audio-and-video-simultenaous-with-ffmpeg-from-a-linux-usb-capt
ffmpeg -y -f alsa -i default -f v4l2 -i /dev/video0 -acodec aac -strict -2 -ac 1 -b:a 64k -vcodec libx264 -b:v 300k -r 30 -g 30 prueba1.mp4 At the beginning I was having trouble with hw:3 component.
V4L2 issues with ffmpeg · Issue #29 · jellyfin ... - GitHub
https://github.com/jellyfin/jellyfin-ffmpeg/issues/29
RealCorebb commented on Jun 22, 2020. For anyone who is looking for solution for green output when using V4L2 M2M: Use new FFmpeg (I've used git master version, newer then 4.2.3) Use yuv420p as pixel format (-pix_fmt yuv420p). Latest FFmpeg should disallow using other formats with v4l2 anyway.
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.
Best FFMPEG configuration for recording Video+Audio with ...
https://raspberrypi.stackexchange.com/questions/49946/best-ffmpeg-configuration-for-recording-videoaudio-with-raspberrypi-and-usb-web
ffmpeg -f alsa -i hw:1 -vcodec h264 -f v4l2 -i /dev/video0 -vcodec copy -y -t 10 out4.mkv The image is wonderful, but, unfortunately, the audio is recorded with a bit lag :(All I want is to set the RaspberryPi to record a few seconds with the audio encompassed at the highest resolution possible, or at least some guidance to achieve that.
Capture images from a webcam using ffmpeg – Øyvind …
https://stegard.net/2021/07/capture-images-from-a-webcam-using-ffmpeg/
On a typical Debian-ish Linux distro, you will also want to add your user to the video and audio groups, so that you can easily access the webcam from a non-desktop session. Capture to an image file, continually overwriting it with new contents ffmpeg -y -f v4l2 -video_size 1280x720 -i /dev/video0 \ -r 0.2 -qscale:v 2 -update 1 /tmp/webcam.jpg
What steps are needed to stream RTSP from FFmpeg?
https://stackoverflow.com/questions/26999595/what-steps-are-needed-to-stream-rtsp-from-ffmpeg
I've also had audio-sync issues with some of the other methods, where this method always has perfect audio-sync. You will have to adjust the command for your device or file. If you're using a file as input, you won't need all that v4l2 and alsa stuff. Here's the ffmpeg|vlc command:
[ROM][6.0.1_r62] VanirAOSP - Honami [15/08/2016] | XDA ...
https://forum.xda-developers.com/t/rom-6-0-1_r62-vaniraosp-honami-15-08-2016.3415569/
We still would love to hear feedback over at this thread and also check out the new XDA app! Thanks and we hope you enjoy the new forums, and thanks for your support of XDA <3. [ROM] [6.0.1_r62] VanirAOSP - Honami [15/08/2016] …
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