[MEncoder-users] pullup question

[Andreas]

Am Mittwoch, 21. Januar 2009 14:45:05 schrieb Scott W. Larson:
> > On 1/20/09 9:21 PM, "Andreas" <linuxdreas at dslextreme.com> wrote:
> > I thought with 1080i you could just use framestep=2 and output it
> > at 30 fps
> > - no pullup needed. Is that incorrect?
>
> You can deinterlace 1080i to 30 fps. In fact this will be your only
> choice if the content is overcompressed to the point that all methods
> of pullup will fail.

That is what I see with some 1080i recordings. One of my local stations 
mangles some movies so bad that all postprocessing methods fail (mixed 
progressive, telecined and interlaced content all in one recording, and 
on top of that they speed up parts of a movie) .

Other stations broadcast mixed progressive and telecined, or plain 
telecined, and -vf pullup restores the original 24p framerate (almost) 
perfectly. 

> The problem is that 30 fps causes pretty bad judder with filmed
> content. This is normally masked by interlaced telecine and would be
> eliminated with a correct 24 fps pullup conversion.
>
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-- 
Gruß
Andreas