> On Fri, 10 Dec 2010 06:15:21 +0100, David Koski <[email protected]> 
> wrote:
>> Is there a filter or other method in Cinelerra to swap the frames back?

Herman Robak schrieb:
> I think the right combination of the effects "frames to fields" and "fields
> to frames" will do the trick.


Hi David & Herman,

this is certainly true -- with frames to fields, a separate 50fps project
and then a back conversion you can do pretty much everything with interlaced
material. (I am using this right at the moment using this to employ the motion
tracker, which tends to become confused when running on shaky interlaced
material, but works super precisely with this trick on 50fps...)

But, just for changing the field order, there is a way simpler method:
just move the video down/up by *exactly* one scanline. This can be achieved
with the "camera" automation. In your case, you'd just use the automation
on that parts of your edit which seem to reverse the field order.

Generally speaking, this trick is also helpful if you want to use interlaced
footage running backwards (without such a correction this obviously would
get the field order crossed)

hope that helps
Cheers,
Hermann Vosseler

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