[Tig] How to do the SD to Film?

Mikko Kuutti mikko.kuutti at sea.fi
Tue Feb 26 12:08:36 GMT 2008

This of course isn't an issue in this case since the source is 25 fps.

I'm not really the expert on current de-interlacing techniques (my  
experience in this matter is from about 6 years back) but I think a  
reverse pull-down could be combined with the de-interlacing.

De-interlacing is really a bastard to do properly, and I hope there  
exist by now good solutions that use motion estimation and the works  
to make use of both fields. Back when I was dealing with it, the  
solution that produced most consistent results was to simply chuck  
every other field away. This gives a full 288 lines of information and  
you can image how that looks on film at worst. This is where a good up- 
rezing algorithm steps in to save the day.


Mikko Kuutti
Deputy Director
National Audiovisual Archive (former Finnish Film Archive)
Pursimiehenkatu 29-31 A / P.O. Box 177, FI-00151 Helsinki, Finland
tel. +358 9 6154 0254, mobile +358 40 900 0455

On 26.2.2008, at 1.10, Bob Friesenhahn wrote:

> On Mon, 25 Feb 2008, Mikko Kuutti wrote:
>> The crucial issue is whether the material is interlaced or not. If  
>> you
>> are lucky, the footage was shot progressive. If not, use the best
>> available de-interlacer.
> Another issue is how to map 30FPS (or 60 fields per second) to  
> 24FPS. Is this best done during the de-interlacing step?
> Bob
> ======================================
> Bob Friesenhahn
> bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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