For Android, what is the best combination of Output Format and Audio Encoder to record high quality speech?

Question

I have found so far that MPEG_4 and THREE_GPP work as formats. OGG does not work at all. THREE_GPP fails with AMR_WB (wide band). "Does not work" / "fails" means my app crashes in the start() function from the code fragment below, as shown by LogCat from the Studio.

private fun startRecording() {
    recorder = MediaRecorder().apply {
        setAudioSource(MediaRecorder.AudioSource.MIC)
        setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)   //OGG fails
        setOutputFile(fileName)
        setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT)  // VORBIS fails with format OGG

        try {
            prepare()
        } catch (e: IOException) {
            Log.e(LOG_TAG, "prepare() failed")
        }

        start()  // failures occur here
    }
}

Any recommendations would be appreciated. Please note the speech in the audio stream will need to be converted to text on the Android device.

Answer 1

I have found so far that MPEG_4 and THREE_GPP work as formats. OGG does not work at all. THREE_GPP fails with AMR_WB (wide band). "Does not work" / "fails" means my app crashes in the start() function from the code fragment below, as shown by LogCat from the Studio.

private fun startRecording() {
    recorder = MediaRecorder().apply {
        setAudioSource(MediaRecorder.AudioSource.MIC)
        setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)   //OGG fails
        setOutputFile(fileName)
        setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT)  // VORBIS fails with format OGG

        try {
            prepare()
        } catch (e: IOException) {
            Log.e(LOG_TAG, "prepare() failed")
        }

        start()  // failures occur here
    }
}

Any recommendations would be appreciated. Please note the speech in the audio stream will need to be converted to text on the Android device.