问与Xuggler转换

EN

at javax.sound.sampled.AudioSystem.getLine(Unknown Source)
at com.xuggle.mediatool.MediaViewer.getJavaSoundLine(MediaViewer.java:730)
at com.xuggle.mediatool.MediaViewer.getAudioQueue(MediaViewer.java:575)
at com.xuggle.mediatool.MediaViewer.onAddStream(MediaViewer.java:440)
at com.xuggle.mediatool.AMediaToolMixin.onAddStream(AMediaToolMixin.java:78)
at com.xuggle.mediatool.MediaReader.getStreamCoder(MediaReader.java:375)
at com.xuggle.mediatool.MediaReader.readPacket(MediaReader.java:461)
at at.jku.tk.mms.xuggler.VideoTranscoderApp.transcode(VideoTranscoderApp.java:44)
at at.jku.tk.mms.xuggler.VideoTranscoderApp.main(VideoTranscoderApp.java:53)


    IMediaReader mediaReader = 
           ToolFactory.makeReader(source.getAbsolutePath());

    // create a media writer
    IMediaWriter mediaWriter = 
           ToolFactory.makeWriter(target.getAbsolutePath(), 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);
    System.out.println("converting");
    // 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) ;
}

public static void main(String[] args) {
    File source = new File(args[0]);
    if (source.canRead()) {
        File target = new File(args[1]);
        VideoTranscoderApp transcoder = new VideoTranscoderApp(source,
                target);
        transcoder.transcode();
    }
}