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<p style="margin-bottom: 0cm;">Hello everybody,</p>
<p style="margin-bottom: 0cm;">my name is Francesco, I am an italian
student graduating in physics. I'm studing the Theora video codec and
making some comparative tests. Unfortunately i'm not able to find
some informations that could be useful. If someone could make clear
some concepts, (or tell me where i can find these informations), i'll
be very happy. ( I've yet read the Theora Format Specification). I'm sorry if many questions could
appear trivial, but many things are new for me....</p>
<p style="margin-bottom: 0cm;">1) Theora uses 64 different
        quantization matrices 8x8: have these matrices a particular
        shape?What's the numerical distribution?</p><p style="margin-bottom: 0cm;">2)Talkink about motion compensation,
        what type of alghoritm is used for the block-matching?</p><p style="margin-bottom: 0cm;"><br></p>
3)Coding some video i've seen tha
        using ffmpe2theora can be fixed some quality levels, using the
        option -v (that allows value from 0 to 10). I've apologized that in
        this case the encoder uses some particular quantization matrices, is
        this right? If it's right, could be possible to know the matrices
        used for a fixed quality level? (for example “-v 6” , that is
        the default value?)
<p style="margin-bottom: 0cm;"></p><p style="margin-bottom: 0cm;">Thank you all in advance for
availability!
</p>