使用xuggle exception将mp3转换为wav

Question

我正在尝试将mp3转换为wav，代码在这里：

String mp3 = "F:\\work\\pic2talk38512.mp3";
String wav = "F:\\work\\pic2talk38512.wav";
TranscodeAudioAndVideo.transcodeTest(mp3, wav);

public static void transcode(String sourceUrl, String destinationUrl) {
    IMediaReader reader = ToolFactory.makeReader(sourceUrl);
    reader.addListener(ToolFactory.makeWriter(destinationUrl, reader));

    while (reader.readPacket() == null)
            do {
            } while (false);
}

我得到了一个例外：

java.lang.UnsupportedOperationException: could not guess codec
at com.xuggle.xuggler.IContainerFormat.establishOutputCodecId(IContainerFormat.java:454)
at com.xuggle.xuggler.IContainerFormat.establishOutputCodecId(IContainerFormat.java:327)
at com.xuggle.xuggler.IContainerFormat.establishOutputCodecId(IContainerFormat.java:300)
at com.xuggle.mediatool.MediaWriter.addStreamFromContainer(MediaWriter.java:1134)
at com.xuggle.mediatool.MediaWriter.getStream(MediaWriter.java:1039)
at com.xuggle.mediatool.MediaWriter.encodeVideo(MediaWriter.java:742)
at com.xuggle.mediatool.MediaWriter.encodeVideo(MediaWriter.java:783)
at com.xuggle.mediatool.MediaWriter.onVideoPicture(MediaWriter.java:1434)
at com.xuggle.mediatool.AMediaToolMixin.onVideoPicture(AMediaToolMixin.java:166)
at com.xuggle.mediatool.MediaReader.dispatchVideoPicture(MediaReader.java:610)
at com.xuggle.mediatool.MediaReader.decodeVideo(MediaReader.java:519)
at com.xuggle.mediatool.MediaReader.readPacket(MediaReader.java:475)
at com.renren.intl.soundsns.pictalk.utils.TranscodeAudioAndVideo.transcodeTest(TranscodeAudioAndVideo.java:75)
at com.renren.intl.soundsns.pictalk.utils.TranscodeAudioAndVideoTest.convert(TranscodeAudioAndVideoTest.java:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

我知道xuggle可以解决extension.But的转换问题，为什么这次失败了？

谢谢

编辑：

以前我可以转换mp3哪个参数(MPEG 22.1KHZ 32kbps)到wav，但如果我使用mp3(MPEG 44.1 the 62kbps)我得到这个异常？

这是怎么发生的？

Answer 1

在这种情况下，xuggle基本上是在抱怨你的编解码器。我认为你需要尝试一下这段代码。

String mp3 = "F:\\work\\pic2talk38512.mp3";

String wav = "F:\\work\\pic2talk38512.wav";    
IMediaReader mediaReader = ToolFactory.makeReader(mp3);
            IMediaWriter mediaWriter = ToolFactory.makeWriter(wav, mediaReader);
            mediaReader.addListener(mediaWriter);
            // IMediaViewer mediaViewer = ToolFactory.makeViewer(true);
            // mediaReader.addListener(mediaViewer);
            while (mediaReader.readPacket() == null);

我希望您使用的是xuggle-xuggler-5.4.jar

Answer 2

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更新：

​

import com.xuggle.mediatool.IMediaReader;
import com.xuggle.mediatool.IMediaViewer;
import com.xuggle.mediatool.IMediaWriter;
import com.xuggle.mediatool.ToolFactory;
public class TranscodingExample {
    private static final String inputFilename = "c:/myvideo.mp4";
    private static final String outputFilename = "c:/myvideo.flv";
    public static void main(String[] args) {// create a media reader
        IMediaReader mediaReader =
               ToolFactory.makeReader(inputFilename);
        // create a media writer
        IMediaWriter mediaWriter =
               ToolFactory.makeWriter(outputFilename, mediaReader);
        // add a writer to the reader, to create the output file
        mediaReader.addListener(mediaWriter);
        // create a media viewer with stats enabled
        IMediaViewer mediaViewer = ToolFactory.makeViewer(true);
        // add a viewer to the reader, to see the decoded media
        mediaReader.addListener(mediaViewer);
        // read and decode packets from the source file and
        // and dispatch decoded audio and video to the writer
        while (mediaReader.readPacket() == null) ;
    } 
}  

这是取自Java code Geek的代码。尝试更改mp3文件的路径，看看是否适用

代码工作的证明

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将mp3 @ 64kbps转换为wav

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