On Sat, 29 Aug 2015, Robert Krüger wrote:
On Sat, Aug 29, 2015 at 4:45 PM, Robert Krüger <krue...@lesspain.de> wrote:
On Sat, Aug 29, 2015 at 3:53 PM, Carl Eugen Hoyos <ceho...@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.
Which I should have done first. I read the il filter docs and now I
understand what you mean. If I am correct in assuming, what the framerate
filter does, this might work just with one stream and would do what I
described as using two streams.
I am afraid I still don't understand how a non-deinterlacing approach
can give better quality. Without deinterlacing you will blend frames which
are 2 units distant in time, with deinterlacing you blend frames which are
1 unit distant.
Consider you have a 25i source, and you want 30i (60p for display)
Are you referring to this filter chain for deinterleaving?
-vf il=l=d:c=d,framerate=30,il=l=i:c=i,yadif=1
And this for deinterlacing?
-vf yadif=1,framerate=60,interlace,yadif=1
The second is much, much better.
Regards,
Marton
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