场景

近期在做微信开发时，需要获取用户发给公众服务号的语音留言。而从微信服务端下载来的语音格式却是amr的格式，同样的你手机录音、Android语音等也都是生成amr格式文件。但当你想在web页面去播放此文件时，就困难了。因为无论是当前HTML5的标签，还是众多的播放插件都不支持amr格式文件的播放。所以，你不得不先把它转码为常见的MP3等类型文件。

maven

ws.schild

jave-core

2.4.4

从我的Mac book 开发环境开始玩。

public class AmrToMp3 {

public static void main(String[] args) throws Exception {

changeTemp();

}

public static void changeTemp() throws InputFormatException {

File source = new File("/Users/daji/Downloads/1.amr"); //源文件

File target = new File("/Users/daji/Downloads/1.mp3"); //目标文件

AudioAttributes audio = new AudioAttributes();

audio.setCodec("libmp3lame");

EncodingAttributes attrs = new EncodingAttributes();

attrs.setFormat("mp3");

attrs.setAudioAttributes(audio);

Encoder encoder = new Encoder();

try {

MultimediaObject multimediaObject = new MultimediaObject(source);

encoder.encode(multimediaObject,target, attrs);

} catch (IllegalArgumentException | EncoderException e) {

e.printStackTrace();

}

}

}

跑一下. GG

十二月 05, 2018 6:42:11 下午 ws.schild.jave.DefaultFFMPEGLocator copyFile

严重: Could not find ffmpeg executable for native/ffmpeg-x86_64-osx is the correct platform jar included?

Exception in thread "main" java.lang.NullPointerException

at java.util.Objects.requireNonNull(Objects.java:203)

at java.nio.file.Files.copy(Files.java:2984)

at ws.schild.jave.DefaultFFMPEGLocator.copy(DefaultFFMPEGLocator.java:144)

at ws.schild.jave.DefaultFFMPEGLocator.copyFile(DefaultFFMPEGLocator.java:123)

at ws.schild.jave.DefaultFFMPEGLocator.(DefaultFFMPEGLocator.java:84)

at ws.schild.jave.Encoder.(Encoder.java:80)

at cn.hitstone.media.util.AmrToMp3.changeTemp(AmrToMp3.java:20)

at cn.hitstone.media.util.AmrToMp3.main(AmrToMp3.java:10)

Process finished with exit code 1

意思就是要安装一个ffmpeg-x86_64-osx

ws.schild

jave-native-osx64

2.4.4

搞定 so easy

Windows 版导这个

ws.schild

jave-native-win64

2.4.4

Linux 版导这个

ws.schild

jave-native-linux64

2.4.4

测试结果

image.png

参考