问题描述

soundtouch 在android中运用，录音文件可以变速，mp3不能变速

用soundStreth.pocess(String infile,String outfile, int rate,int tempto,int fitch)；
这个方法，对wav有用，但是对mp3不起作用。

查询官网文件
SoundStretch features:
1 Reads & writes .wav audio files
2 Allows very broad parameter adjustment ranges:
Tempo & Playback Rate adjustable in range -95% .. +5000%
The sound Pitch (key) adjustable in range -60 .. +60 semitones (+- 5 octaves).
3 Beats-Per-Second (BPM) detection that can adjust tempo to match with the desired BPM rate.
4 Full source codes available
5 Command-line interface allows using the SoundStretch utility for processing .wav audio files in batch mode
6 Supports processing .wav audio streams through standard input/output pipes
6 SoundStretch uses the SoundTouch library routines for the audio procesing.

我想知道是否有其他的方法，可以使mp3也可以变速。

解决方案

将mp3 decode成pcm再编码成wav进行播放。