APIchanges

20090301 - r17682 - lavf 52.31.0 - Generic metadata API
  This version introduce a new metadata API (see av_metadata_get() and friends).
  The old API is now deprecated and shouldn't be used anymore. This especially
  include the following structure fields:
    - AVFormatContext.title
    - AVFormatContext.author
    - AVFormatContext.copyright
    - AVFormatContext.comment
    - AVFormatContext.album
    - AVFormatContext.year
    - AVFormatContext.track
    - AVFormatContext.genre
    - AVStream.language
    - AVStream.filename
    - AVProgram.provider_name
    - AVProgram.name
    - AVChapter.title