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这是错误：

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at com.googlecode.mp4parser.boxes.mp4.ESDescriptorBox.getContentSize(ESDescriptorBox.java:60)
    at com.googlecode.mp4parser.AbstractBox.getSize(AbstractBox.java:203)
    at com.googlecode.mp4parser.BasicContainer.getContainerSize(BasicContainer.java:70)
    at com.coremedia.iso.boxes.sampleentry.AudioSampleEntry.getSize(AudioSampleEntry.java:330)
    at com.googlecode.mp4parser.BasicContainer.getContainerSize(BasicContainer.java:70)
    at com.coremedia.iso.boxes.SampleDescriptionBox.getSize(SampleDescriptionBox.java:112)
    at com.googlecode.mp4parser.AbstractContainerBox.getHeader(AbstractContainerBox.java:67)
    at com.coremedia.iso.boxes.SampleDescriptionBox.getBox(SampleDescriptionBox.java:94)
    at com.googlecode.mp4parser.authoring.tracks.AppendTrack.mergeStsds(AppendTrack.java:81)
    at com.googlecode.mp4parser.authoring.tracks.AppendTrack.<init>(AppendTrack.java:65)
    at Mp4.merging.merge(merging.java:97)

这是我的代码：

 if (audioTracks.size() > 0) {
            result.addTrack(new AppendTrack(audioTracks.toArray(new Track[audioTracks.size()])));
        }

而且我找不到 Null Element 。

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1 回答 1

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问题出在 vlc 音频转码中，所以 mp4 的音轨有问题。我需要设置音频编码 MP2L2，但我不知道正确的 VlC 转码选项以使其工作

于 2015-09-01T17:30:47.663 回答