Merge "DO NOT MERGE: MPEG4Extractor: ensure returned status is checked." into mnc-dev am: 80059d44c4 am: 72840f2216 am: 9e9987c46d am: 9583ca702a  -s ours am: acf3c39437 am: d1ce7bb7c8
am: bd951d1c5c

Change-Id: I0ff608f66320230f34dc793b9dda746fce627d51