[FFmpeg-devel] [PATCH] avfilter: add framerate video filter

Robert Krüger krueger at lesspain.de
Sat Aug 29 16:45:48 CEST 2015

On Sat, Aug 29, 2015 at 3:53 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Robert Krüger <krueger <at> lesspain.de> writes:
> > Do you mean processing the top and bottom fields
> > as separate progressive
> Yes.
> (Sorry, I thought this is what "deinterleaving and
> interleaving" means.)
> > streams?
> Not necessarily "streams", just not processing them
> interlaced but deinterleaved.
> If this leads to shadows, then I would suggest to
> use two framerate instances.
I understand the variant with processing the fields as separate streams
with two framerate instances, but not the other one. One would have to test
but the more I think about it, I think it could very well work and result
in better quality as the deinterlacing/reinterlacing obviously destroys
motion information.

One would probably have to make tests with interlaced footage that contains
a lot of motion.

It would certainly be interesting to see that filter chain, though. I
haven't worked with the il filter at all, so I would have to read up on
that first.

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