files (old and new format), pass only real extradata to the codec
Enable cook codec from lavc, prefer lavc codecs for 14_4 and 28_8
formats. Disable internal 28_8, it's broken now and will be removed soon
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17150 b3059339-0415-0410-9bf9-f77b7e298cf2