[功能请求] G726 audio recording

[pubpy2015]

描述该功能的用处，可以提供相关资料描述该功能
I use MediaServer to stream and record video streams from network cameras. (use addStreamProxy method)
If the camera has an audio codec of AAC or G711, I can listen audio from stream of the MediaServer (via VLC player) and the mp4 recording file also has audio.
However, if the camera has an audio codec of G726, even though I can listen audio from stream of the MediaServer, the mp4 recording file has no audio.
该功能是否用于改进项目缺陷，如果是，请描述现有缺陷
Yes, mp4 recording files have no audio if the camera's audio codec is G726
描述你期望实现该功能的方式和最终效果
I would like the MediaServer to be able to record from the video stream of a camera with G726 audio codec

[xia-chu]

Do you have a link to the RFC document for RTP packetization of G.726 ？

[pubpy2015]

Hi,
I found these documents:
https://datatracker.ietf.org/doc/html/rfc3551#section-4.5.4
https://en.wikipedia.org/wiki/G.726
https://www.ietf.org/rfc/rfc3551.txt

[pubpy2015]

It seems that mp4 container does not support g726 audio codec. Can MediaServer transcode audio codec to aac like in ffmpeg?
The command below will record video with sound:
"ffmpeg -probesize 20000000 -analyzeduration 20000000 -rtsp_transport tcp -rtsp_flags prefer_tcp -stimeout 15000000 -buffer_size 2000000 -i rtsp://127.0.0.1:8554/proxy/cam8 -vcodec copy -acodec aac -y C://123.mp4"

[xia-chu]

No, zlmediakit do not support transcode.
But we have a proprietary version supported

[pubpy2015]

I just want to transcode the audio codec (for record mp4), the video codec remains the same.
I see this pull request: #3099
Is it for audio transcoding?