media_kind=2 (Movies) indicates a regular video, that is, a video that
isn't a TV Show (media_kind=64).
Also fix up the system playlist for Movies, and that brings us to DB
schema_version 5.
TV-related metadata as found in TV shows bought on the iTunes store, for
instance.
At the time of writing, ffmpeg doesn't support this yet. Until it does,
contact Ace Jones <ace.jones1@yahoo.com> for patches and instructions.
Fall back to the legacy format-specific scanners for WMA, FLAC and Musepack,
as ffmpeg doesn't report metadata for FLAC nor Musepack and has bugs with
some WMA variants.
Use ffmpeg's (starting with SVN 20090301) new metadata API to extract
metadata from virtually all formats supported by ffmpeg. That will allow
to get rid of some dependencies and some open-coded routines that aren't
maintainable.
