How do I use MediaRecorder to record video without causing a segmentation fault?
- by rabidsnail
I'm trying to use android.media.MediaRecorder to record video, and no matter what I do the android runtime segmentation faults when I call prepare(). Here's an example:
public void onCreate(Bundle savedInstanceState)
{
Log.i("video test", "making recorder");
MediaRecorder recorder = new MediaRecorder();
contentResolver = getContentResolver();
try {
super.onCreate(savedInstanceState);
Log.i("video test", "--------------START----------------");
SurfaceView target_view = new SurfaceView(this);
Log.i("video test", "making surface");
Surface target = target_view.getHolder().getSurface();
Log.i("video test", target.toString());
Log.i("video test", "new recorder");
recorder = new MediaRecorder();
Log.i("video test", "set display");
recorder.setPreviewDisplay(target);
Log.i("video test", "pushing surface");
setContentView(target_view);
Log.i("video test", "set audio source");
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
Log.i("video test", "set video source");
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
Log.i("video test", "set output format");
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
Log.i("video test", "set audio encoder");
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
Log.i("video test", "set video encoder");
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
Log.i("video test", "set max duration");
recorder.setMaxDuration(3600);
Log.i("video test", "set on info listener");
recorder.setOnInfoListener(new listener());
Log.i("video test", "set video size");
recorder.setVideoSize(320, 240);
Log.i("video test", "set video frame rate");
recorder.setVideoFrameRate(15);
Log.i("video test", "set output file");
recorder.setOutputFile(get_path(this, "foo.3gp"));
Log.i("video test", "prepare");
recorder.prepare();
Log.i("video test", "start");
recorder.start();
Log.i("video test", "sleep");
Thread.sleep(3600);
Log.i("video test", "stop");
recorder.stop();
Log.i("video test", "release");
recorder.release();
Log.i("video test", "-----------------SUCCESS------------------");
finish();
} catch (Exception e) {
Log.i("video test", e.toString());
recorder.reset();
recorder.release();
Log.i("video tets", "-------------------FAIL-------------------");
finish();
}
}
public static String get_path (Context context, String fname) {
String path = context.getFileStreamPath("foo").getParentFile().getAbsolutePath();
String res = path+"/"+fname;
Log.i("video test", "path: "+res);
return res;
}
class listener implements MediaRecorder.OnInfoListener {
public void onInfo(MediaRecorder recorder, int what, int extra) {
Log.i("video test", "Video Info: "+what+", "+extra);
}
}
