project settings for 24fps questions at DVinfo.net

George Lockwood · April 26th, 2005, 04:00 PM

here's my scenario:

i have film which was xferred long ago to video. i'd like to be able
to remove the pulldown and ultimately project this material at
the original 24fps in a digital environment. how do i do this?

i've exported deintelaced frames as sequences of stills and
written macros to discard the doubled frames from the xfer.
i've then renumbered the stills to get them sequential again
(deleting the doubled frames breaks the sequence numbering).

this gives me 24 progressive stills which i can re-import into an
nle system (premiere or premiere prov1.5 most likely). how
should i set up the project to recieve this sequence? what should
i ultimately output to? would i actually export as a 24fps (or 23.976)
file? 24p? 24pa? should i write another macro to re-introduce
pulldown in another specific pattern while leaving the frames
as progressive?

can someone walk me through the process as a simple outline?
bottom line question, i suppose, is can i really make a 24fps file
for digital projection (or dvd) and how would such film material
best be presented?

tia!

Rob Lohman · April 30th, 2005, 03:27 AM

This shouldn't be too hard to do. Which NLE (edit software) are you using?

For example: I'd reckon that if you capture this footage (hopefully in DV)
and put it inside Sony Vegas with a 24p (not advanced!) project it should
do all of this for you.

Premiere Pro should be able to do this as well, just don't use advanced
pulldown (2:3:3:2) since that is not how telecine is done outside of the
TV world.

I think you would not need any of those stills or macro's etc.

How did you capture this footage?

You should not need to de-interlace since the footage can't be interlaced
(unless they re-introduced interlacing which is probably gonna cause
problems for you).

Just capture it and load it into a 24p project, all should be fine.

Glenn Chan · April 30th, 2005, 01:30 PM

1- Unless you have a projector than projects at 24p, you might as well leave it like it is?

A DVD player will add pulldown to your material so it kinda defeats the point of what you're doing. There will be a slight advantage in compression if you convert to 24p though.

2- I have very little experience with 24fps footage, but from what I can gather:

When you load the footage into a 24p project, the film cadence may be wrong. Your editing software doesn't know where the 3:2 pulldown sequence starts/ends so it may pull the wrong frames. Play high motion scenes and look for any weirdness. If you see some, you will need to adjust the offset.

April 26th, 2005, 04:00 PM	#1
George Lockwood New Boot Join Date: Mar 2005 Posts: 13	project settings for 24fps questions here's my scenario: i have film which was xferred long ago to video. i'd like to be able to remove the pulldown and ultimately project this material at the original 24fps in a digital environment. how do i do this? i've exported deintelaced frames as sequences of stills and written macros to discard the doubled frames from the xfer. i've then renumbered the stills to get them sequential again (deleting the doubled frames breaks the sequence numbering). this gives me 24 progressive stills which i can re-import into an nle system (premiere or premiere prov1.5 most likely). how should i set up the project to recieve this sequence? what should i ultimately output to? would i actually export as a 24fps (or 23.976) file? 24p? 24pa? should i write another macro to re-introduce pulldown in another specific pattern while leaving the frames as progressive? can someone walk me through the process as a simple outline? bottom line question, i suppose, is can i really make a 24fps file for digital projection (or dvd) and how would such film material best be presented? tia!

April 30th, 2005, 03:27 AM	#2
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	This shouldn't be too hard to do. Which NLE (edit software) are you using? For example: I'd reckon that if you capture this footage (hopefully in DV) and put it inside Sony Vegas with a 24p (not advanced!) project it should do all of this for you. Premiere Pro should be able to do this as well, just don't use advanced pulldown (2:3:3:2) since that is not how telecine is done outside of the TV world. I think you would not need any of those stills or macro's etc. How did you capture this footage? You should not need to de-interlace since the footage can't be interlaced (unless they re-introduced interlacing which is probably gonna cause problems for you). Just capture it and load it into a 24p project, all should be fine. __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

April 30th, 2005, 01:30 PM	#3
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	1- Unless you have a projector than projects at 24p, you might as well leave it like it is? A DVD player will add pulldown to your material so it kinda defeats the point of what you're doing. There will be a slight advantage in compression if you convert to 24p though. 2- I have very little experience with 24fps footage, but from what I can gather: When you load the footage into a 24p project, the film cadence may be wrong. Your editing software doesn't know where the 3:2 pulldown sequence starts/ends so it may pull the wrong frames. Play high motion scenes and look for any weirdness. If you see some, you will need to adjust the offset.