[FFmpeg-devel] [PATCH] libavfilter: add photosensitivity filter

[Michael Niedermayer]

On Sat, Jul 13, 2019 at 09:32:38AM +0200, Paul B Mahol wrote:
> On 7/13/19, Michael Niedermayer <michael at niedermayer.cc> wrote:
> > On Fri, Jul 12, 2019 at 11:26:34AM +0200, Paul B Mahol wrote:
> >> From: Vladimir Panteleev <git at thecybershadow.net>
> >>
> >> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> >> ---
> >>  doc/filters.texi                  |  20 ++
> >>  libavfilter/Makefile              |   1 +
> >>  libavfilter/allfilters.c          |   1 +
> >>  libavfilter/vf_photosensitivity.c | 336 ++++++++++++++++++++++++++++++
> >>  4 files changed, 358 insertions(+)
> >>  create mode 100644 libavfilter/vf_photosensitivity.c
> >
> > I support this filter or some variant of it to be applied
> >
> > some area of work is that it seems to work less well at higher
> > framerates
> > for example:
> > -vf  fps=120,photosensitivity Denno.ogg
> > or 240fps
> >
> 
> Please refrain from commenting for stuff you know very little or nothing.
> Thanks.
> 
> Your comments are not valuable at all.

i normally just ignore your insults but here i think i should not

if the same video at 120fps fails to be filtered as well as it is at 30fps
there is a problem. Because again its the same data, its not played faster
it just internally has more frames.
A viewer seeing a frame for 33ms cannot know if thats 1 frame at 30fps
or 4 times the same frame at 120fps. 
So if one is filtered stronger than the other they cannot both be optimal

About understanding, i looked at the paper referenced by compn, and the code
of the filter. That is not much indeed, but i doubt the other people here have
better knowledge about the subject. If some expert is around here who knows
this stuff. His/her oppinion and input would no doubt be very valuable

Thanks

[...]
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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The bravest are surely those who have the clearest vision
of what is before them, glory and danger alike, and yet
notwithstanding go out to meet it. -- Thucydides
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