[FFmpeg-user] MJPEG Quantization Matrix

Robert Kr├╝ger krueger at lesspain.de
Thu Sep 17 10:34:59 CEST 2015


On Wed, Sep 16, 2015 at 4:40 PM, Dsoccer16 <josepedro.16 at hotmail.com> wrote:

> Thank you very much.
> It works but there are two things I don't understand.
> Why can't I set all the coefficients equal 1? Is it possible to use a
> custom
> quantization matrix and at the same time control the coefficients using the
> q parameter?
>
>
If you succeed doing this, it would be nice if you could share your
findings here. I failed a few years ago to use custom matrices to drive
bitrate up higher than with qmin 1 qmax 1.


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