Please do use these tests if you do some libmpeg2 changes. * get the official suite of mpeg2 torture tests at http://libmpeg2.sourceforge.net/files/mpeg2dec-streams.tar.gz or using SVN : # svn co svn://svn.videolan.org/libmpeg2/streams (OK, I did some reorganization work on the archive, so it is not really the official suite anymore) Then, * extract this archive at the same level as your mpeg2dec directory : in your working directory you should have subdirectories mpeg2dec and streams. * or, extract this archive where you want, but change the first line of the "tests" file to reflect that location. Do _not_ remove the pound (#) sign at the beginning of the line. Now run test/regression is the name of the test suite you want to use. For the official mpeg video conformance tests, just use "tests". is the type of IDCT you are using. If your machine supports MMX, choose "mmx". If your machine uses the c idct, choose "c" That's it... walken