This works around common issues with mpeg-ps files with broken timestamps.
Also allows playing the broken sample from issue1024.
Originally committed as revision 21562 to svn://svn.ffmpeg.org/ffmpeg/trunk
Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.
Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk