Add audio to video in android

Question

I want to develop an android application which can record a video (mp4), then I have some audio files (mp3) in my resources folder, and I want to add it to the end of the video.

Answer 1

After api version 18 android MediaCodec apis supports to access the low level api. MediaMuxer muxing the elementary streams.

https://developer.android.com/reference/android/media/MediaMuxer.html