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De-Interlace Issue
Hi,
I have some public Domain footage that I need to integrate with a music video for web streaming , and there are some questions/problems with the found footage.
First my specs for the project are;
864×486
square pixel
24 fps
progressiveNow for the pubic domain footage (typical example can be found at; https://www.archive.org/details/hindenberg_explodes);
typical specs for found footage;
mpeg2 or mpeg4
640×480
square
29.97
no fieldsAbout my problems with footage. The footage is not de-interlaced even though it has no fields. So the format properties show no fields. It was also shot on film most likely @24fps. but now its 29.97(dv).
So my question is what is the best way to get rid of the interlacing and/or convert footage to “real” progressive? The project was edited in FCP and will be finished off in After Effects.
The project has already been edited and the found footage can be rendered separate from my footage for composing in AE.
I have the Nattress G-filters for FCP and Magic Bullet for AE, I also have access to a friends machine with Magic Bullet Editors for FCP.
And the other question , what is the best way to convert this footage to 24fps?
Thanks In Advance,
Jim Branstetter
RubberBulletStudio.comJim Branstetter
RubberBulletStudio.com -
2 Replies
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[jim branstetter] “First my specs for the project are;
864×486
square pixel
24 fps
progressive “Just for clarity — are your specs 24p as in 24.0 frames per second, or 23.976 frames per second? After Effects is very precise about frame rate.
[jim branstetter] “So my question is what is the best way to get rid of the interlacing and/or convert footage to “real” progressive? The project was edited in FCP and will be finished off in After Effects.”
Have you tried removing the pulldown?
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events -
[jim branstetter] “The footage is not de-interlaced even though it has no fields. So the format properties show no fields. It was also shot on film most likely @24fps. but now its 29.97(dv).”
i assume you can see the interlacing and that’s how you know that it’s not de-interlaced. also, if it was 24p, but recorded at 29.97, you will see a pattern of 2 interlaced frames and 3 progressive frames (possibly 1 int, 4 prog, if 24pa) as you step frame by frame through the footage… if you don’t then it probably wasn’t shot in 24p.
if it is indeed 24p with a pulldown, then getting it back to 24p is a breeze in ae (i’m sure walter’s link describes this) and there are no plugins needed.
if the interlacing is on all frames, then it was not shot in 24p, and you will still want to separate fields in the interpret footage settings, then try any of the various methods of converting 30i to 24p.
some things to watch for regardless of 24p or 30i:
field order… it’s normally lower for sd, but could be upper depending on how it was captured, especially since 640×480 is common with analog capture, and field order will be determined by the capture settings.
field mush… if the footage was shot/captured in dv, 480 is the standard vertical res. if it was d1 and then exported as 480, then it may have been scaled from 486 to 480 (rather than cropped). if that happened after the interlacing was done, then you will not be able to remove the interlacing.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW
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