void UpdateVideoInfo()
{
progressSlider.maxValue = (int)mVideoPlayer.GetLength();
progressSlider.value = (int)mVideoPlayer.GetCurrentPosition();
progressText.text = "进度：" + progressSlider.value + " / " + progressSlider.maxValue;
string msg = "缓冲百分比 ==> " + mVideoPlayer.GetCurrentBufferingPercentage();
pushMsg(msg);
}