am 9509a0ce: am 318a759e: Merge "Make sure that timestamp does not go backward in MP4 file writer" into gingerbread

Merge commit '9509a0ce7ec1b10305bb6bd5fbf0edcf5b4f7fe1'

* commit '9509a0ce7ec1b10305bb6bd5fbf0edcf5b4f7fe1':
  Make sure that timestamp does not go backward in MP4 file writer