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Old 11th May 2012, 07:38   #13  |  Link
jconklin
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Join Date: Mar 2006
Posts: 39
I knew I was going to need more documentation on Qtype.
In the XVID code that handles the mpeg and h263 processing only mpeg intra and inter allow the specification of a matrix. The h263 routines have the matrix built into their code. I assume they use what the h263 spec calls for. If using h263 intra or h263 inter the matrix argumenht is ignored.
I have not supplied "paired matricies" one for mpeg intra and one for mpeg inter. Any matrix, except 4 and 9, can be used with either mpeg intra or mpeg inter. 4 and 9 can only be used with mpeg intra. If there are enough requests I could add a couple of arguments to allow passing in a matrix as a string of 64 numbers.
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