Quote:
Originally Posted by n0an
For example, this is the ultimate matrix. Could anyone kindly explain me how it will work on the quality?
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This cannot be explained easily. The effect of quantization matrices (positive or negative) may highly depend on the kind of content and on the target bitrate.
For example there are "sharp" matrices tuned to keep fine detail at high bitrates. Such a matrix will give horrible results at medium/low bitrates.
At the same time there are "smooth" matrices tuned to keep reasonable quality at low bitartes. Such a matrix won't give satisfactory results at medium/high bitrates.
In short: Don't use a custom matrix, unless you know exatcly what you are doing and why you need a non-standard matrix.
(Note: H.264 is known to give best results with the standard "flat" matrix. Psy optimizations, as implemented in x264, usually work better than custom matrices)
Quote:
Originally Posted by n0an
One more thing, if I set bitrate of 1200 kbps and use this matrix, will the ultimate matrix increase the file size or all matrix work within the fed bitrate?
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Of course the resulting file size will always be the same, as long as you set the same target (average) bitrate. The following rule applies, no matter what:
size = bitrate * duration
Well, given that the rate control of your encoder works properly and doesn't fail with non-standard matrices
