Android : mediaRecorder on samsung saving an empty video

i tried the code on HTC and it works fine, but on my samsung its not working. please any help would be appreciated.

i think the problem is related to CamcorderProfile.QUALITY_LOW.

    recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
    recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);

   CamcorderProfile cpLow = CamcorderProfile
           .get(CamcorderProfile.QUALITY_LOW);
    recorder.setProfile(cpLow);

    recorder.setProfile(CamcorderProfile .get(CamcorderProfile.QUALITY_LOW));


    recorder.setOutputFile(Environment.getExternalStorageDirectory()+"/videocapture_example.mp4");

if you would like me to post more code then please ask