EX-3 1080 24P is recording with 3:2 pulldown?

[Tim Kolb]

Hi John,

We were shooting sound, and they did post as HD…

It’s been about 3 years since I’ve touched an F900, so I suppose it was there and I’ve just had it leak out of my memory (which seems to happen more and more these days.)

As much as the whole prime adapter thing isn’t my everyday mode of operation (I prefer something like a D21 which realizes much more of the image quality of the optics), the camera did a nice job with a reasonable set of Zeiss primes.

TimK,
Director, Consultant
Kolb Productions,

[Roger Hendrick]

In my experience ‘pulldown’ refers to slowing the footage and for 24p film telecine it would need to be slowed by 24/1.001 to fit in with HD NTSC workflow at 23.98. Pulldown with a ratio like ‘3:2 pulldown’ refers to duplicating frames or interpolating fields to fit in a larger spatial time like 29.97 in the referenced pattern. This has nothing to do with drop/non-drop and is a common misconception (my referring to 24 -> 23.98 as pulldown not withstanding… we all contribute to the confusion). One major problem with the Canon 5DMkII before the firmware was updated was that it shot in 30p. This was not shorthand for 29.97 and required an extra step (in Cinema Tools for instance) to play nice in an NTSC workflow. That’s the crux of the miss-communication – these terms 24p, 30p etc. are being used as shorthand for 23.98 and 29.97 when they do exist as their own frame rates and are not interchangeable. Likewise 29.97 can be numbered in either Drop or Non-Drop timecode, it’s still 29.97 and the timecode numbering (dropping a frame number but of course you’re still keeping the frame intact) is completely different than the actual frame rate or timing.

Here’s a link to Sony’s product spec for the HDWF900R. They specify 24p and 23.98 as available frame rates.
https://pro.sony.com/bbsc/ssr/product-HDWF900R/

Here’s a link to someone else’s 24p/23.98 response using ‘pulldown’ to describe it.
https://www.highdef.com/library/faq.htm

And a good description on Wikipedia here.
https://en.wikipedia.org/wiki/24p

Roger Hendrick
The Airship Factory
http://www.airshipfactory.com
HD Video Production – Blu-ray Authoring

[John Sharaf]

One other bit of useful information is that there drop frame is only used in 29.97 and 59.94 rates, it does not apply to 23.97 and even if it’s e4ngaged in the camera menu it is overruled by the 23.97/24 setting. In addition it does not apply to non-fractional, meaning interger frame rates like “true” 24 and 25p and 50i.

Drop frame, as I’m sure has been mentioned here many times before originated with the introduction of color in the 50’s and allowed for extra “color burst” signal to be included in the frame such that they needed to create extra room. Furthermore because of the standard, the sound speed was altered slightly too so that it needed to be recorded at 23.97/29.97 to stay in sync.

JS

[David Burch]

John is correct on this. I have gotten in to the bad habit of calling any frame rate that’s not an integer “drop frame”. *sigh* Video was much more simple when all editing was done tape to tape 😀

[Steve Wargo]

Here ya go on the pulldown issue.
https://www.zerocut.com/tech/pulldown.html‘

Steve Wargo
Tempe, Arizona
It’s a dry heat!

Sony HDCAM F-900 & HDW-2000/1 deck
5 Final Cut (not quite PRO) systems
Sony HVR-M25 HDV deck
2-Sony EX-1 HD .

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