DO NOT MERGE MPEG4Extractor: ensure kKeyTrackID exists before creating an MPEG4Source as track.
am: b016207f
* commit 'b016207f':
DO NOT MERGE MPEG4Extractor: ensure kKeyTrackID exists before creating an MPEG4Source as track.
Change-Id: I81cdae1a917cfcd712e800cf3edfd168b1c89c32