没有视频媒体播放器

Question

我在mediaplayer中播放视频时遇到问题。我有一个声音，但没有视频。我尝试了一切，找不到解决办法。或者，也许你知道如何在videoview中播放sdp文件？下面的代码：

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

有些视频无法在媒体播放器演奏，如果它没有a/v的编解码器，或者它太复杂或交错严重（查看Logcat查找某些标志）。可能是一个或多个原因。要确保媒体播放器可以播放要播放的视频类型，请将具有相同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。 尽管如此，请尝试使用videoView来检查视频是否可以播放。您的代码似乎没问题。

试试此代码：

package 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被ansynchronously创建的，所以我们必须等待，直到表面已经被创建，然后将返回的表面持有者对象。 ，我使用了以下布局：

<?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> 

上述解决方案应该工作。

Answer 2

注肯定，但尝试设置数据源，如：

mMediaPlayer.setDataSource(this, SrcPath);