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我正在尝试使用 xuggler 将一系列图像编码为 MP4 视频。然而，试图解决时基/帧率问题让我发疯！我似乎无法获得像样的视频编码。使用这个Converter.java例子，我有

IRational num = IRational.make(24, 1);
outStreamCoder.setFrameRate(num);
outStreamCoder.setTimeBase(IRational.make(num.getDenominator(),  num.getNumerator()));

...

long tsOffset = 0;
if (outStream.getStartTime() != Global.NO_PTS && outStream.getStartTime() > 0
            && outStream.getTimeBase() != null)
{
        IRational defTimeBase = IRational.make(1, (int) Global.DEFAULT_PTS_PER_SECOND);
        tsOffset = defTimeBase.rescale(outStream.getStartTime(), outStream.getTimeBase());
}

....

long timeStamp = (3600 * count); // experimenting
IVideoPicture outFrame = converter.toPicture(worksWithXugglerBufferedImage, timeStamp);
if (outFrame.getTimeStamp() != Global.NO_PTS)
    outFrame.setTimeStamp(outFrame.getTimeStamp() - tsOffset);

对于 30 幅图像，编码时长远小于 1s。我希望它会超过一秒钟。谁能帮帮我，这让我困惑了一段时间！

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1 回答 1

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原来我是个白痴！timeStamp我根据timebaseH.264 编码文件分配帧 a (1/90,000)：我真的应该从第一帧开始分配一个以微秒为单位的时间。（例如 的倍数(1e6/fps)）。所以我的代码应该是：

IRational fps = IRational.make(24, 1);
outStreamCoder.setFrameRate(fps);
outStreamCoder.setTimeBase(IRational.make(fps.getDenominator(),  fps.getNumerator()));

...

long timeStamp = (1e6/fps.getNumerator() * count);
于 2011-11-23T08:45:56.290 回答