在android中录制现有的音频文件

Question

I am currently building an app in android, and I am trying to record my audio over an existing audio file (without changing the length of the file), does anyone know how is it possible to do that? Everything I tried just puts the audio files one after another in one file.

Answer 1

A. You should use GGmpeg for Android, for example. Here you have some questions like yours.

• question with code
• more detailed tutorial
• Google Group
• another question

B. Another approach, although limited, is Android SoundPool. Check documentation here .

The sound pool requires you to manage multiple files rather than doing mixdowns and playback of a single file. It would be cool if the soundpool let you grap the output as a IOStream but, alas, the SDK doesn't seem to allow it. Further, it would be nice if the AudioRecorder allowed you to grab a stream from the music layer...but that doesn't look possible either. List of audio inputs: http://developer.android.com/reference/android/media/MediaRecorder.AudioSource.html

SOURCE: https://stackoverflow.com/a/2254086/9415337

C. Others suggest also doing it in a backend server.

D. This might also help you.