Question

我在媒体播放器中播放视频时遇到问题。我有声但没有视频。我尝试了一切，找不到解决方案。或许你知道如何在videoview中播放sdp文件？这是代码：

public class TestStream1 extends Activity implements Callback{
MediaPlayer mMediaPlayer;
String SrcPath = "rtsp://184.72.239.149/vod/mp4:BigBuckBunny_175k.mov";
private SurfaceView mPreview;
private SurfaceHolder holder;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    mPreview = (SurfaceView) findViewById(R.id.surface);
       holder = mPreview.getHolder();
       holder.addCallback(TestStream1.this);
       holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

       holder.setFixedSize(400,300); 
       mMediaPlayer = new MediaPlayer(); 
       try{
           mMediaPlayer.setDataSource(SrcPath);
           mMediaPlayer.setDisplay(holder);
           mMediaPlayer.prepare();
           mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
           mMediaPlayer.start(); 

       }catch(Exception e){
           Toast .makeText( TestStream1.this, "Fail", Toast.LENGTH_LONG).show();
       }

}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {
    // TODO Auto-generated method stub

}
@Override
public void surfaceCreated(SurfaceHolder holder) {
    // TODO Auto-generated method stub

}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    // TODO Auto-generated method stub

}
}

编辑：布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" />
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
        <SurfaceView
            android:id="@+id/surface"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" />
    </LinearLayout>
</LinearLayout>

Answer 1

某些视频无法在媒体播放器中播放，如果它没有针对其a / v的编解码器，或者它太复杂或交错不当（请查看Logcat中有关某些内容的迹象）。可能是一个或多个原因。要确保媒体播放器可以播放您要求播放的视频类型，请将相同a / v编解码器和扩展名的视频文件保存到SD卡中，然后尝试使用默认媒体播放器播放。 Meanwile，尝试使用 videoView 检查视频是否可以播放。您的代码似乎没问题。

试试这段代码：

打包a.b;

public class TestStream1 extends Activity implements Callback{
    MediaPlayer mMediaPlayer;
    String SrcPath = "rtsp://184.72.239.149/vod/mp4:BigBuckBunny_175k.mov";
    private SurfaceView mPreview;
    private SurfaceHolder holder;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mPreview = (SurfaceView) findViewById(R.id.surface);
        holder = mPreview.getHolder();
        holder.addCallback(TestStream1.this);
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        holder.setFixedSize(400,300); 
        mMediaPlayer = new MediaPlayer(); 

    }
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        // TODO Auto-generated method stub

    }
    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        try{
            mMediaPlayer.setDisplay(holder);
            mMediaPlayer.setDataSource(SrcPath);
            mMediaPlayer.prepare();
            mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mMediaPlayer.start(); 

        }catch(Exception e){
            Toast .makeText( TestStream1.this, "Fail", Toast.LENGTH_LONG).show();
        }

    }
    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        // TODO Auto-generated method stub
mMediaPlayer.release();
    }
}

SurfaceHolders是异步创建的，因此我们必须等到表面已经创建，然后分配返回的表面持有者对象。我使用以下布局：

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" />
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <SurfaceView
            android:id="@+id/surface"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>
</LinearLayout>

上述解决方案应该有效。

Answer 2

请注意，但请尝试设置数据源，如：

mMediaPlayer.setDataSource(this, SrcPath);

没有视频媒体播放器

2 个答案: