[FFmpeg-devel] Post-processing filter Documentation

[arwa arif]

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?


> [...]
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