i use MediaRecorder to record audio ,but i find that it can't record
audio in first 0.7s.
plz help me to solve this problem.
my code like this:
public void init() {
try {
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
if (file == null) {
File rootDir =
Environment.getExternalStorageDirectory();
file = File.createTempFile(PREFIX, EXTENSION, rootDir);
}
mediaRecorder.setOutputFile(file.getAbsolutePath());
mediaRecorder.prepare();
} catch (Exception ex) {
Log.e(SysConst.TAG, "init", ex);
}
}
public void start() {
startRecording();
}
public void free() {
stopRecording();
}
public void startRecording() {
mediaRecorder.start();
}
/**
* This method stops recording
*/
private void stopRecording() {
mediaRecorder.stop();
mediaRecorder.release();
}
--------------------------------------------
MediaRecordUtil reco = new MediaRecordUtil();
reco.init();
reco.start();
mRecoThread = new VoiceRecoThread(4000);
mRecoThread.start();
mRecoThread.join();
reco.free();
the amr data in first 0.7s like this
00000030h: E7 BA F0 00 00 00 C0 00 00 00 00 00 00 00 00 00 ;
绾?..?........
00000040h: 00 00 00 00 00 00 3C 55 00 88 B6 66 79 E1 E0 01 ; ......<U.��
fy徉.
00000050h: E7 CF F0 00 00 00 80 00 00 00 00 00 00 00 00 00 ; 缦?..
�.........
00000060h: 00 00 00 00 00 00 3C 48 F9 1F 96 66 79 E1 E0 01 ; ......<H?�f
y徉.
00000070h: E7 8A F0 00 00 00 C0 00 00 00 00 00 00 00 00 00 ;
��?..?........
00000080h: 00 00 00 00 00 00 3C 54 FD 1F B6 66 79 E1 E0 01 ; ......<T?�f
y徉.
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