rg3/youtube-dl — pull request #2119 by jaimeMF (2014-01-08 17:02:10+00:00)
Title: Add ‘--prefer-avconv’ and ‘--prefer-ffmpeg’ options (#2115)

Affects the ffmpeg post processors, if ‘--prefer-ffmpeg’ is given and both avconv and ffmpeg are installed, it will use ffmpeg. Otherwise it will follow the old behaviour.

We got that request some time ago (#1522) and some people want to use a custom installation of ffmpeg instead of the system avconv.