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<audio>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
<!-- https://mvnrepository.com/artifact/ws.schild/jave-core -->
<dependency>
<groupId>ws.schild</groupId>
<artifactId>jave-core</artifactId>
<version>2.4.4</version>
</dependency>
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.<init>(DefaultFFMPEGLocator.java:84)
at ws.schild.jave.Encoder.<init>(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
<!-- https://mvnrepository.com/artifact/ws.schild/jave-native-osx64 -->
<dependency>
<groupId>ws.schild</groupId>
<artifactId>jave-native-osx64</artifactId>
<version>2.4.4</version>
</dependency>
搞定 so easy
Windows 版导这个
<!-- https://mvnrepository.com/artifact/ws.schild/jave-native-win64 -->
<dependency>
<groupId>ws.schild</groupId>
<artifactId>jave-native-win64</artifactId>
<version>2.4.4</version>
</dependency>
Linux 版导这个
<!-- https://mvnrepository.com/artifact/ws.schild/jave-native-linux64 -->
<dependency>
<groupId>ws.schild</groupId>
<artifactId>jave-native-linux64</artifactId>
<version>2.4.4</version>
</dependency>
测试结果
image.png
