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Gemx,

What did you modify ? I already tried to simply change the GUID of the H264_SubType in mediaformats.h to the GUID of the Haali file source, but then I get the same result as you. (First frame plays but then stops)

Could you try to match the output Haali gives and see if that works ?

(Haali also has a different bitCount, Compression, and a different MPEG2VIDEOINFO structure)