MediaPlayer getDuration返回-1412558917 [英] MediaPlayer getDuration returns -1412558917

问题描述

我完全迷失了.我发现代码非常简单，并且在文档中没有找到为什么会返回那么大的负数的任何原因.代码如下

I'm totally lost in this. I found the code pretty simple, and didn't find in the documentation any reason why would return a negative number that large. The code is as follows

private int getDuration(String audioPath) throws Exception {
   mediaPlayer = new MediaPlayer(); // This variable was created globally
   mediaPlayer.setDataSource(audioPath);
   return mediaPlayer.getDuration(); // Here it returns -1412558917 in every audio file i record, no matter if it's 3 seconds long or 8

}

我认为记录方式并不重要，但是如果我记错了，我将添加代码.我保存文件的格式是3gp.在此之后，我可以重现音频，所以我不知道可能是什么问题

I think that it doesn't matter how I record it, but if I'm mistaken I'll add the code. The format I save the file is 3gp. I'm able to reproduce the audio after this, so I don't know what might be the problem

谢谢

推荐答案

在返回持续时间之前，您是否尝试过添加 mediaPlayer.prepare(); ?

Have you tried adding mediaPlayer.prepare(); before you return the duration?

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