[android-developers] Video recording results in corrupted files

I finally got it to record videos. The preview surfcae works fine and
the audio stream of the audio resulting file is also okay. But the
video stream is a complete messup because you cannot figure out what
it is. The main part of the screen is filled with green colours.
Any idea what could be the reason? I tried all codec/container,
resolution and framerate variations, without success.

here is the code:

public class CamcorderPreview extends SurfaceView implements
SurfaceHolder.Callback {
private MediaRecorder recorder;
private SurfaceHolder holder;

public CamcorderPreview(Context context, AttributeSet attrs) {
super(context, attrs);
holder = getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

recorder = new MediaRecorder();

//recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
//recorder.setAudioEncoder
(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setVideoEncoder
(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setVideoSize(480, 320);
recorder.setVideoFrameRate(15);
//recorder.setMaxDuration(5000);
recorder.setOutputFile("/sdcard/dcim/100ANDRO/test.mp4");
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int
width, int height){

}

@Override
public void surfaceCreated(SurfaceHolder holder) {
recorder.setPreviewDisplay(holder.getSurface());
try {
recorder.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {

}

public void startRecording(){
if(recorder != null){
recorder.start();
}
}

public void stopRecording(){
if(recorder != null){
recorder.stop();
recorder.release();
}
}

}
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