Open lestrozi opened 2 years ago
Thanks! I am not very experienced in audio, but adding audio from usb seems to a bit complicated. Reading from the microphone maybe easy. We can use alsa with python3-pyalsa. But we have to encode the sound into AAC(-LC) because of the mp4 format. But encoding is a bit hard, because there aren't any decent aac encoder library there. The ffmpeg aac comes inside libavcodec and it is very big. The libfdk_aac is not in the raspbian repository, so the users have to build it, it's not user friendly. Maybe we can use the libvo-aacenc0, but it's not a very good quality codec and there are no python bindings. So we have to write bindings too. I am working to replace the raspivid with v4l2. After I can dig deeper into this.
TBH I think ffmpeg is the safest bet. Apparently some people can combine video and audio piping raspivid to ffmpeg -i - -f alsa -ac 1 -i hw:0,0 -map 0:0 -map 1:0 -vcodec copy -acodec aac
. I recently ordered a USB microphone and will play a bit with it when it arrives :)
Hi !
great work
yess please add audio
for me is opus the best choise. it is in the ffmpeg and has better performance than libfdk
-c:a libopus -application lowdelay -b:a 32k -movflags +faststart -async 1
and sorry but is it possible to be come an option for rtsp streaming ?
can you tell me how i can do that for my own to add audio and rtsp in your files
Great project! Any chance of adding audio from the USB microphone when creating the mp4 frames? If you have some pointers on how to do that I can do some coding and submit a PR.