Develop Reference

How to get the time of each audio sample

so from my understanding is that the mediarecorder saves audio samples and binds them with a timeStamp to be able to seek through the audio file later (by the help of a prgressbar):
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setOutputFile(fileName);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
recorder.prepare();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
recorder.start();
My question
Is there any way to get these timestamps of audio samples real time while recording a voice?
please I need your help.

MediaRecorder not recording audio

I am tried to record audio using MediaRecorder:
MediaRecorder recorder= new MediaRecorder();
recorder.reset();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//
recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(path);
recorder.setMaxDuration(30*60*1000);
recorder.prepare();
recorder.start();
Code works fine no exception occur at run time, some times file not created on SDCard if file will create then file size is 0KB.
I have also register Error and Info listeners OnInfoListener OnErrorListener in
OnInfoListener public void onInfo(MediaRecorder mr, int what, int extra) returns what=802 and extra=6
I have tried this code on real device but not works.

try this its working for me:
MediaRecorder recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(path);
recorder.prepare();
recorder.start();

Here is an excellent reference for MediaRecorder to capture media.
http://developer.android.com/guide/topics/media/audio-capture.html
The sample code used in the tutorial works without any changes.
(Just make sure you added the necessary permissions in the manifest file)

You can try this:
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setOutputFile(mFileName);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mRecorder.prepare();
} catch (IOException e) {
Log.e("start", "prepare() failed");
}
mRecorder.start();
if you getting any error then please paste logcat.

How to record a audio in Android and save it in Database?

Hi
I am making an Android app for recording a audio for 5-10 sec and store that in Database.
For audio recording i follow this http://xhampa.pastebin.com/Yr2hie6q
But it is not working properly. What to do ?
I can not record the Audio on my G1 mobile.
Any suggestion welcome.

For your audio recording, try this code:
MediaRecorder recorder;
public void startRecording() throws IOException
{
SimpleDateFormat timeStampFormat = new SimpleDateFormat(
"yyyy-MM-dd-HH.mm.ss");
String fileName = "audio_" + timeStampFormat.format(new Date())
+ ".mp4";
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile("/sdcard/"+fileName);
recorder.prepare();
recorder.start();
}
protected void stopRecording() {
recorder.stop();
recorder.release();
}
You can find your file on your sdcard.

audio recording in android

I have and android emulator and microphone connected to my pc. I want to capture pcm pulses from microphone (i.e. record voice) and then send to udp socket. please anybody help me in source code at least for voice recording.

You can use this code for your audio recording:
MediaRecorder recorder;
void startRecording() throws IOException
{
SimpleDateFormat timeStampFormat = new SimpleDateFormat(
"yyyy-MM-dd-HH.mm.ss");
String fileName = "audio_" + timeStampFormat.format(new Date())
+ ".mp4";
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile("/sdcard/"+fileName);
recorder.prepare();
recorder.start();
}
protected void stopRecording() {
recorder.stop();
recorder.release();
}

Check Audalyzer, a sample application showing you how to read the raw audio stream from the microphone on real time.

Android Record Audio issue

I found the code to record audio, but I always get:
The method setOutputFile(FileDescriptor) in the type MediaRecorder is not applicable for the arguments (Uri)
So how would I need to describe the filepath that it works?
// Prepare recorder source and type
MediaRecorder recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
// File to which audio should be recorded
File outputFile = getFileStreamPath("output.amr");
Uri target = Uri.parse(outputFile.getAbsolutePath());
recorder.setOutputFile(target);
// Get ready!
recorder.prepare();
// Start recording
recorder.start();
// Stop and tidy up
recorder.stop();
recorder.release();

You're trying to pass in an Uri as parameter to the method which doesn't expect that.
Just replace recorder.setOutputFile(target) with:
recorder.setOutputFile(outputFile.getAbsolutePath());
That should work since string parameter is allowed.