alrighty it works,, just get the CCCP and uninstall all the other codecs, guess it must hv crashed as it overlaps. or u dont hv the mastroska pack @ haali media splitter. anyways easier thn done get CCCP less worries to think. good luck. and still mp4 requires alllot of heavy tasking on my processor. Pentium M 1.6..... sigh.