how to record audio file with better quality in android?

Question

I am creating one application which play recorded file on Android to iphone and vice-versa.

now I am using ,

        audioRecorder = new MediaRecorder();
        audioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        audioRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        audioRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

file recorded using this code having size 85 kb /15 sec and a very poor quality.

if I use ,

        audioRecorder = new MediaRecorder();
        audioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        audioRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
        audioRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

then file size is 25kb/15 sec and quality much better than aac. but problem is that AMR is not playable in iPhone.

So please suggest recording schema for Android having better quality, affordable size and can play on iPhone also.

Shirleyshirlie

Answer 1

Increase the recorder.setAudioEncodingBitRate(value) if you want to change the quality.

recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
recorder.setAudioEncoder(MediaRecorder.getAudioSourceMax());
recorder.setAudioEncodingBitRate(16);
recorder.setAudioSamplingRate(44100);
recorder.setOutputFile(path);
recorder.prepare();
recorder.start(); 

EDIT:

Another option is to add a converter to your app. Convert AMR to AAC.

Beater

Thanks Jermaine, audioRecorder.setAudioSamplingRate(44100); audioRecorder.setAudioEncodingBitRate(96000); try this but having much noise in sound. – Shirleyshirlie

Try to adjust the sampling rate and the bit rate. and find a better place to record. – Beater

The bit rate is measured in bits per second, not kb per second, so should be around 128000 rather than 16 as shown here (a value of 16 would correspond to bit depth). – Xeroderma

recorder.setAudioEncoder(MediaRecorder.getAudioSourceMax()); crashes the app on my side; however recorder.setAudioEncodingBitRate(128000); works almost perfectly. – Apportionment

Get max causes "Invalid audio encoder". Android 8.1. – Highchair

EncodingBitRate is too small. Quality of audio is too bad. Use higher EncodingBitRate – Auraaural

Answer 2

This link is very useful: Android supported media formats

This section gives us more information about audio and video formats.

Alyworth