[FFmpeg-devel] Post-processing filter Documentation

[Michael Niedermayer]

On Tue, Feb 10, 2015 at 01:04:50AM +0530, arwa arif wrote:
> On Sat, Feb 7, 2015 at 11:39 PM, Michael Niedermayer <michaelni at gmx.at>
> wrote:
> 
> > On Sat, Feb 07, 2015 at 03:53:55PM +0530, arwa arif wrote:
> > > On Mon, Feb 2, 2015 at 10:23 AM, Michael Niedermayer <michaelni at gmx.at>
> > > wrote:
> > >
> > > > 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
> > > >
> > > >
> > > I have updated the page: http://trac.ffmpeg.org/wiki/Postprocessing
> > > I want to know if I should make a different table for becnhmark?
> >
> > yes, i think a seperate table would be better
> >
> >
> Updated the documentation.

looks fine,
saste might have more comments though

thanks

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The worst form of inequality is to try to make unequal things equal.
-- Aristotle
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