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ilsils
about HD(1080, 60i) to 35mm Film(24p) transfer
on Jul 30, 2005 at 10:10:48 am

hi, out there.

now i'm working on a feature film(super 35mm) and my client gave me some HD documentary tape(1920 x 1080, 60i) for insert shots.

so far, i found that fieldsKit and twixtor(and maybe RSMB together) can solve my task.

after testing the demo versions and trying the tutorials, here is my workflow and some questions.

1. deinterlace: 60i -> 60p
2. twixtoring : 60p -> 24p
3. motionblur : to compensate the difference of shutter angle(ie. exposure time) between
30fps and 24fps, especially for fast moving objects.

q1. do i have to deinterlace to 60p instead of to 30p?
if i were to slow down the clip, 60p could be better, but my final result shoud be 24p.

q2. in twixtor mauals and tutorials, entire parameters are explained enough.
where can i find the detail explainations of the FieldsKit?
i can't find out which combinations of those settings is good for me because i'm new to
Re:Vison and maybe i'm using demo version.

any kind reply will be greatly appreciated.
thanks in advance.


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Pierre Jasmin
Re: about HD(1080, 60i) to 35mm Film(24p) transfer
on Jul 30, 2005 at 10:07:18 pm


You say "
1. deinterlace: 60i -> 60p
2. twixtoring : 60p -> 24p
3. motionblur : to compensate the difference of shutter angle(ie. exposure time) between
30fps and 24fps, especially for fast moving objects.
"

Is this in AE, if not I would need to change the instructions that follow:

Some start-up cues:
http://www.revisionfx.com/generalfaqsFieldSupport.htm



Comp 1: Deinterlacing

Would worry about deinterlacing primarly on locked-off shots

option A. No camera motion:
Set Comp1 to 29.97
deinterlace 1 frame per field (turning motion masking on)

option B. Camera Motion
Set Comp1 to 59.94
work at double FPS mode

option C. Ignore FieldsKit

Comp 2: Drop Comp1 into Comp2, Apply Twixtor
Set Comp2 to 24 FPS
if Comp1 case A above in Twixtor set Input FPS to 29.97
if Comp1 case B above in Twixtor set Input FPS to 59.94
if Comp1 case C above in Twixtor set Twixtor Fields In to Lower

You could set Motion Blur Compensation to 0.5 and bypass the next step
Else set Motion Blur Compensation to 0

Comp 3 Motion Blur: Drop Comp 2 into Comp3 (if you have not optioned out-- You should get a slightly better result that way but it's one more step)
Comp Frame Rate 24 FPS,
Apply RSMB
So you say you want to go from 60I HD to 24P.
The last point should be going from 59.94 to 24 (2 fields per frame X 29.97), so is even more significant.

Set Motion Blur to 0.5 or 0.4 whatever feels visually right to you


Render 24 FPS.


Pierre
http://www.revisionfx.com



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