This includes a revert of r25840 Originally committed as revision 25842 to svn://svn.ffmpeg.org/ffmpeg/trunk
Originally committed as revision 25677 to svn://svn.ffmpeg.org/ffmpeg/trunk
This moves some groups of tests for single codecs to separate files, and adds shorthands for running all tests in a group. Originally committed as revision 24697 to svn://svn.ffmpeg.org/ffmpeg/trunk