Use stream id instead of stream type to select multiple audios correctly. Assumes that track id is stream_index + 1 which works 99% of time but could be incorrect some times.
Fixes #230 . While usually the MP4 track ID is stream_index (0-based) + 1. It doesn't always have to be that way and that could fail in some rare cases. It works for the customer reported scenario.
Use stream id instead of stream type to select multiple audios correctly. Assumes that track id is stream_index + 1 which works 99% of time but could be incorrect some times.