[MEncoder-users] pullup useless?

[Vladimir Mosgalin]

Hi Daniel Gnoutcheff!

 On 2008.11.28 at 09:12:13 -0500, Daniel Gnoutcheff wrote next:

> On Fri, 2008-11-28 at 14:16 +0300, Vladimir Mosgalin wrote:
> > Well, no one said that pullup is universal solution. If detc or ivtc
> > work for you, use them (though you should use ivtc=1 with mencoder, and
> > corresponding detc options). These filter have their advantages and
> > there are cases when they do work better, due to different strategy.
> 
> If that's the way things are, then that's cool. It's just that the docs
> gave me a different impression; when I read the man page entires for
> detc and ivtc, I came away with the message "don't use these, these
> suck, they're not being maintained, they're depreciated, use pullup or
> filmdint instead". So I thought the fact that detc & ivtc worked and
> pullup didn't was something to be really concerned about.
> 
> BTW thanks much for the tip about passing parameters to detc and ivtc. I
> guess I need to stop reading between the lines of the documentation and
> start reading the damn lines. :D

I never had good experience with filmdint. As about ivtc and detc - ivtc
and pullup are similar, and while pullup usually performs better, ivtc
sometimes can be more useful. detc is different story, it locks on fixed
pattern, which works only for unedited telecined material, but in such
cases, it produces perfect result and is the best choice. It'll work for
every scene, including ones that can't be inverse telecined correctly by
ivtc and pullup (still frames, slow vertical motion, motion only in
small details like lips and so on). In such scenes, analyzing "how to
do ivtc" can be near impossible, but detc, which will blindly drop
frames according to selected pattern will work. Unfortunately, often
detc can't be used, but when it works, use it without doubt. 

Also, for damaged video divtc filter can help. If your video has been
heavily processed after telecining, chances are none of the filters will
help; but divtc sometimes can restore it somewhat, making it look
better. Use two-pass mode, adaptive one doesn't produce satisfying
results

-- 

Vladimir