when playing audio, method selectTrack() doesn't work(播放音频时, 无法设定音轨)

[javaLover1984]

I take a video file(like .rmvb) as a audio file to play, can't set audio track, selectTrack() doesn't work.
the result is at some point you can get different currentPositions by MediaPlayer.getCurrentPosition(). how can I solve this? any tips?
我把一个视频文件(如.rmvb格式)当成音频文件来播放(为的就是只听声音,不看画面), 不能设定音轨, 方法selectTrack()不管用,结果便是在音频播放的过程中想获得某点的进度,通过MediaPlayer.getCurrentPosition()会得到多个不同的结果. 怎么解决这个问题, 有没有什么建议??视频播放的时候是没有此问题的.