mediaplayer错误（1，-5001）

Question

有什么问题？
-5001是什么意思？

05-03 15:09:00.766 21171-21183 / com.finnq.masil.dev V / MediaPlayer：收到的消息msg = 100，ext1 = 1，ext2 = -5001 05-03 15：09：00.766 21171-21183 / com.finnq.masil.dev E / MediaPlayer：错误（1，-5001）

public Object instantiateItem(View pager, final int position) {
    View v = mInflater.inflate(R.layout.view_guide, null);
    v.setTag("video"+position);

    final VideoView video = (VideoView) v.findViewById(R.id.guide_item_video);
    LinearLayout text1 = (LinearLayout) v.findViewById(R.id.guide_item_text1);
    LinearLayout text2 = (LinearLayout) v.findViewById(R.id.guide_item_text2);
    LinearLayout text3 = (LinearLayout) v.findViewById(R.id.guide_item_text3);
    LinearLayout text4 = (LinearLayout) v.findViewById(R.id.guide_item_text4);

    int videoRawData = 0;
    if (position == 0) {
        videoRawData = R.raw.intro_01;
        text1.setVisibility(View.VISIBLE);
    } else if (position == 1) {
        videoRawData = R.raw.intro_02;
        text2.setVisibility(View.VISIBLE);
    } else if (position == 2) {
        videoRawData = R.raw.intro_03;
        text3.setVisibility(View.VISIBLE);
    } else if (position == 3) {
        videoRawData = R.raw.intro_04;
        text4.setVisibility(View.VISIBLE);
    }
    String uriPath = "android.resource://" + mCtx.getPackageName() + "/" + videoRawData;
    video.setVideoURI(Uri.parse(uriPath));
    video.setZOrderOnTop(true);
    video.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mediaPlayer) {
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    if (viewpager.getCurrentItem() != position) {
                        video.pause();
                    }
                }
            }, 100);
        }
    });
    video.start();

    ((ViewPager) pager).addView(v, 0);
    return v;
}