/**
* Decodes an audio file (mp3, flac, wav, etc. everything which can be decoded by ffmpeg) to a
* downsampled wav file.
*
* @param input an audio file which will be decoded to wav
* @param wavoutput the output wav file
* @param samplerate the samplerate of the output wav.
* @throws IllegalArgumentException
* @throws InputFormatException
* @throws EncoderException
*/
public static void decodeAudioFile(File input, File wavoutput, int samplerate)
throws IllegalArgumentException, InputFormatException, EncoderException {
assert wavoutput.getName().endsWith(".wav");
AudioAttributes audio = new AudioAttributes();
audio.setCodec("pcm_s16le");
audio.setChannels(Integer.valueOf(1));
audio.setSamplingRate(new Integer(samplerate));
EncodingAttributes attrs = new EncodingAttributes();
attrs.setFormat("wav");
attrs.setAudioAttributes(audio);
Encoder encoder = new Encoder();
encoder.encode(input, wavoutput, attrs);
}
