svn: contrib/ffmpeg: Work around the fact that there is not enough register available on Mac OS X/x86 for certain optimization (most likely a gcc bug).

We will get the art if either:
    psz_arturl is NULL
    psz_arturl doesn't begin with "file://"

Has anyone been able to encode TO theora with VLC lately ?

            - Use a QDirModel to provide completion, this is cool for geeks, but may increase the size of the object, since we didn't use that class before... Any thoughts on that? Remove it for Windows ?
            - Clean the layouts, and simplify and fix some signals.
            - layout fixes for capture.

album art: the corrects picture URLs begin with "file://" else, we have to download/extract/look in the cache
sets the ArtworkURL to the file in cache also when it had been extracted previously

\\\\ will become \ and \\\" will become "

Should fix problems with building libvlc.so.1 when libvlc.so.0 is installed.
Cannot test since the tree is currently broken.