Binary package “libavcodec-extra” in ubuntu trusty

Libav codec library (additional codecs meta-package)

 Libav is a complete, cross-platform solution to decode, encode, record,
 convert and stream audio and video.
 .
 This package depends on the latest version of the libavcodec variant
 that offers additional codec support. Application packages can depend
 on it if they require or suggest this variant in a robust manner.