[FFmpeg-devel] FFv1.3: Final testing - How to proceed?

[Michael Niedermayer]

On Fri, Nov 02, 2012 at 10:42:12AM +0100, Peter B. wrote:
> On 11/01/2012 11:39 PM, Michael Niedermayer wrote:
> > take 10 files               
> > take 10 ways to encode them
> > build a table of 100 cells each contains the percentage of how much
> > bigger the file gets with GOP 1 instead of GOP 100.
> > add 3 columns that contain the rowwise max, min and average
> > add 3 rows that contain the columnwise max, min and average
> Ok. Now I think I got it.
> I'll use the notation "1.00" for "100%", as I think it's easier readable
> - if that's ok with you.
> 
> For the selection of input videos to take for this, please tell me which
> ones from Derf's collection [1] you'd like to have?

I really dont know but it should be on one hand
few videos to keep the table readable
and
a diverse set covering yuv/rgb high motion/low motion scene changes
and lack of scene changes, 8bit and >8bit material low res and high
resolution.


> 
> > please also make sure the result is correctly formatet and is
> > vertically aligned
> Just to avoid misunderstandings:
> You mean like this?:
> 
>           coder=1; coder=0; context=1; context=0; slices=4; slices=30;
> crc=0; crc=1;  min;  avg;  max
> filename1    1.00;    1.03;      0.95;      1.05;      1.0;       1.2; 
> 0.96;  0.98; 0.96; 1.01;  1.2
> filename2    1.04;    0.98;      0.65;      0.75;      1.0;       1.2; 
> 0.96;  0.98; ...
> min          1.00;    ...
> avg          1.02;    ...
> max          1.04;    ...

yes this looks much closer to what i had in mind, though i dont know
if the values represent what i wanted
    
The idea here is also that 1.00 means a file compressed with GOP=1
and GOP=100 is equally large. a value of 2.0 would mean that
GOP=1 results in twice as large files as GOP=100
also if all numbers are larger than 1.00 than GOP=1 is always worse
than GOP=100 for the tested cases and the max and average would then
give a good hint on how much worse at average and in worst case

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Democracy is the form of government in which you can choose your dictator
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