Feature Request : Overlay Audio over Video(already containing Audio)

[pawaom]

Currently this code allows only to replace or remove audio of video, there is no support for overlaying audio over video which already has audio.

According to this

https://developer.android.com/reference/android/media/MediaMuxer#History ,

now Muxing Multiple Video/Audio Tracks is allowed for Api 26 and higher for an mp4 container.

I have been looing for examples , about using this feature, but cannot find any code. Can you please provide sample code and include this feature in future releases.