[FFmpeg-devel] FFv1.3: Final testing - Results

[Michael Niedermayer]

On Fri, Nov 02, 2012 at 03:30:14PM -0400, Dave Rice wrote:
> 
> On Nov 2, 2012, at 3:14 PM, Dave Rice wrote:
> > On Nov 2, 2012, at 3:00 PM, Michael Niedermayer wrote:
> >> On Fri, Nov 02, 2012 at 01:01:07PM +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
> >>>> 
> >>>> please also make sure the result is correctly formatet and is
> >>>> vertically aligned
> >>> Here's what I got now, comparing GOP 1 to GOP 300 with different
> >>> encoding parameters:
> >>> (Properly aligned with a fixed-width font, but sorry it's wider than 80
> >>> characters)
> >>> 
> >>> //----------------------------------
> >>>                                                  FFv1 (version
> >>> 1)                                  FFv1 (version
> >>> 3)                                                                                              
> >>> 
> >>> Name                   PIX_FMT  Duration_TS raw       coder=0    
> >>> coder=1    context=0    context=1     coder=0     coder=1   
> >>> context=0    context=1    slices=4    slices=30    crc=0    crc=1   
> >>> min    avg    max
> >>> akiyo_qcif             yuv420p          300 11140        0.96        
> >>> 0.9         0.96         0.87        0.91        0.84        
> >>> 0.91         0.79        0.91         0.81     0.91     0.91   0.79  
> >>> 0.89   0.96
> >>> bowing_qcif            yuv420p          300 11140        0.97       
> >> 
> >> please post this table without line wraping at 80
> >> if you want could be html, this would also allow color to be easily
> >> added
> > 
> > I converted Peter's data to an HTML table. I hope we can get consensus on what color to paint the HTML table. :)
> 
> Email stripped my html attachment.

yes the mailing list is configured to strip html mail.


> Now uploaded here: http://dericed.com/reports/ffv1-stats.html

thanks
from this i think its clear that the loss for GOP=1 is too big to
make it default as such,

peter, can you repeat this test with 2 pass mode (that is add 2pass
to all cases and remove all 1pass cases)?

also several of the columns are redundant and identical


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

Concerning the gods, I have no means of knowing whether they exist or not
or of what sort they may be, because of the obscurity of the subject, and
the brevity of human life -- Protagoras
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