以无效状态调用的setOutputFormat: 4 (where和why)

I have the following code:

我有以下代码:

Log.i("xx","A");
                 media_recorder = new MediaRecorder();
Log.i("xx","B");
                 media_recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
Log.i("xx","C");
                 media_recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); 
Log.i("xx","D");
                 media_recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
Log.i("xx","E");
                 media_recorder.setVideoSize(320, 240);
Log.i("xx","F");
                 media_recorder.setVideoFrameRate(15);
Log.i("xx","G");
                 CamcorderProfile profile = CamcorderProfile.get(CameraInfo.CAMERA_FACING_FRONT,CamcorderProfile.QUALITY_LOW);
Log.i("xx","H");
                 media_recorder.setProfile(profile);
Log.i("xx","I");
                 media_recorder.setOutputFile(fname);
Log.i("x