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I am trying to retrieve the channel count of a .wav sound file using TrackInfo and MediaFormat but I cant seem to get a handle of a MediaFormat object which i believe would provide the channel count.

I have tried following this instruction but it is not helping.

here is what I have so far

mediaPlayer = new MediaPlayer();
    mediaPlayer.setDataSource(soundPath);
    mediaPlayer.prepare();

    TrackInfo info = mediaPlayer.getTrackInfo()[0];
    MediaFormat mf =
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kc ochibili
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1 Answers1

3

You need to use MediaExtractor and MediaFormat to access the KEY_CHANNEL_COUNT

Here is an example,

MediaExtractor extractor = new MediaExtractor();
extractor.setDataSource(path);
//where path is a String variable and points to the data source
MediaFormat format = extractor.getTrackFormat(i);
//where i is an int variable and denotes the index value of a track.
//For the first track: i = 0; 
int count = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);

I would also recommend reading the example in MediaExtractor Class Description from Android Developer Reference. Here is the link:

http://developer.android.com/reference/android/media/MediaExtractor.html

I hope this helps. Happy coding.

Raj Kumar
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