Merge commit '15e84ed3f141c586e8cb78ed58365cf5a511108a'

This commit is a no-op. We want to do this ourselves, since avconv and ffmpeg
differ quite a bit.

* commit '15e84ed3f141c586e8cb78ed58365cf5a511108a':
  avconv: convert to codecpar

Merged-by: Derek Buitenhuis <derek.butienhuis@gmail.com>