Published : 5th August 2003
I'm shooting greenscreen with the Sony F-900 for an eventual down-conversion
to SD. The client likes "the pulldown look" and wants everything
23.98P. Will pulldown artifacts noticeably affect the composite (which
will be made after downconversion)?
I expect no more so than 35mm shot 24fps and composited on SD video. Still,
I wonder if there is a frame rate that is kinder and cleaner for eventual
SD composites (say for instance 30p)? Any ideas?
Also, any experiences with Clearscan in regard to 23.98, shutter speed
and sound sync? Am I right in thinking I lose the effect of the 1/48th
shutter while using ECS, or can I have my ECS frequency and 1/48th shutter
at the same time?
DP, Los Angeles
You cannot have a double shutter 1/48 and a separate ECS shutter with
If you change from 1/48 to any other shutter that will be the effective
shutter angle/exposure. FYI You are limited to the shutter angle/exposure
choices at a particular frame rate 23.98psf versus 59.94i for example.
Be more clear on Sound sync, What do you mean Sync Sound recorded separately
Sync Sound recorded on Camera
If recorded Separately Run Sound at 29.97NDF and your Golden If on Camera
It doesn't matter because the sound recording device is the HD Video Tape
and you can run at any speed and the sound will always be perfectly in
Now ECS is just a variable Shutter and because of that it only matches
1/48th when the variable shutter is set to 1/48th other than that look
at the ECS number and imagine a 1/##.## or whatever ie: 1/66.85th or whatever
you dial in.
23.98 Original then 3-2 Pulldown wont bother your Composite or your SD
So Go for it.
Hope this helps
B. Sean Fairburn
HD Director of Photography
>I'm shooting greenscreen with
the Sony F-900 for an eventual down->conversion to SD.
The client likes "the pulldown look" and wants
The answer is: maybe. There are a lot of variables.
On the production end: Will the foreground subject have any sort of rapid
motion? If so, the motion blur is going to be difficult to matte if you're
starting at 23.98.
On the post end: What is being used to downconvert? What is being used
to pull the mattes? How skilled is the person pulling the mattes?
And so on.
>Will pulldown artifacts noticeably
affect the composite (which will be >made after downconversion)?
Pull down removal is pretty much automatic at this point, so as long as
the cadences are maintained should not be any particular problem. There
will be no pull down artifacts, if done correctly.
Still would insist on doing VFX in HD land if it was my project, much
better control of everything in everyway.
best of luck
HD & Film Vfx
Vancouver, Canada & Shanghai, China