Merge "MPEG4Extractor: ensure returned status is checked." into nyc-dev am: 02772b134e am: 2aa463e371 am: 4fa11b6cdf am: ae73886c4d am: 447c686405
am: 4865242a90

Change-Id: I3585c7570927adcdc4868482b573ac25323848d3