Merge commit '248ea4a9f773210a7b7dbd7892e6b865a0f7add3' into kraken
* commit '248ea4a9f773210a7b7dbd7892e6b865a0f7add3':
Distinguish QCELP audio from mpeg4 audio, ignore QCELP audio tracks since we don't have a decoder for it, ignore potentially malformed metadata for AMR NB and WB tracks.