[FFmpeg-devel] Post-processing filter Documentation

[Michael Niedermayer]

On Sat, Jan 31, 2015 at 02:30:29PM +0530, arwa arif wrote:
> On Thu, Jan 29, 2015 at 5:18 PM, Stefano Sabatini <stefasab at gmail.com>
> wrote:
> 
> > On date Thursday 2015-01-29 03:46:42 +0530, Arwa Arif encoded:
> > > I have updated the page with new images.
> > > http://trac.ffmpeg.org/wiki/Postprocessing
> >
> > Note: probably you can improve the page layout by stripping the black
> > top and bottom bands in the matrix reference.
> >
> > How do you exactly created the query image? Also please specify the
> > information unit (200K = 200 Kbit/s, right?)
> >
> >
> I used this command to create the query image:
> ffmpeg -i matrixbench_mpeg2.mpg -b:v 200k matrixbench_mpeg2-lq.mpg
> 
> 
> 
> 
> > > What exactly needs to be done in benchmark section?
> >
> > I already suggested a command (please keep some context when
> > replying), but Michael observed that the actual benchmark could be
> > affected by I/O speed.
> >
> > I wonder if there is a better way to benchmark the performance of a
> > single filter. Using START/STOP_TIMER can be an idea but it would be
> > probably a little awkward.
> >
> 
> So, which method should I follow to get the runtime?

Either would work and as stefano seems to have no preferrance / hasnt
replied i suggest to use the simpler
also the input and output files can be placed in /dev/shm to avoid
IO overhead this limits their size though so the video to test with
cant be huge

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

Dictatorship naturally arises out of democracy, and the most aggravated
form of tyranny and slavery out of the most extreme liberty. -- Plato
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