projector wont deinterlace

[Nick Meyers]

in my part of the world we don’t have to deal with pulldowns etc,
but could be that is your problem.

you have put 23.976 material into a 29.97 timeline,
isn’t it the case that the fields get re-distributed,
and you will get blended frames?

can you not work in a 24p sequence?

nick

[Rafael Amador]

Those are not interlacing artifacts.
[Stu Gilbert] “shot at 24p, edited in a 29.97 sequence, lower frame first.”
If you shot Progressive, you have to edit Progressive.
I think you are creating those artifacts by treating Progressive stuff as Interlaced.
rafael

[Bret Williams]

In FCP legacy, if you drop 24p into an interlaced sequence, it will not add interlaced pulldown. It just repeats every 4th frame. As well, in an interlaced sequence, progressive material will always still look progressive. Even if it’s treating it as interlaced material, it is still impossibly to create fields where there are none. IOW, the field order won’t even matter as both fields are exactly the same.

If you shot 24p, and you want to use it in a 30fps sequence, you should add interlaced pulldown. That is what goes on on television and DVDs. Otherwise you’ll get an odd stuttery cadence of every 4th frame repeating.

In FCP X if you drop 24p into a 30i sequence, it WILL add proper interlaced pulldown. (which will look like 3 progressive frames followed by 2 blended frames) But it is of course a newer app more in tune with modern technology and professional formats. I would donwload the trial of X, drop your 24p into a 30i sequence and press export and you’ll have yourself a broadcast ready interlaced hd file in no time at all that has the proper interlaced pulldown and cadence.

But if you don’t want to do that, why not just drop the 24p into a 30p sequence and see if the cadence is acceptable. If there’s not too much panning it very often is.

There is no reason to be deinterlacing anything as you don’t have anything to deinterlace. That’s why you haven’t seen any difference with any deinterlacing tools.

[Bret Williams]

Oh, wait… EDITED 24p in a 29.97i sequence at LOWER first? Assuming it’s anything except a DV sequence, then it should be UPPER first.

So it’s not really fields, but somehow it’s playing the fields in reverse order for each frame, and pulling a field from the next or previous frame and mixing it with the current. Not interlacing, just kinda offsetting. That’s all I can figure. Change the sequence to upper first and you might fix it. Or, like I said just change it to progressive because 7 can’t add pulldown anyway.

[Stu Gilbert]

Bret- how would I go about adding interlaced pulldown?
(Unfortunately, when I started editing on all this, I was not made aware of the fact that I’d need to change sequence settings to edit progressive footage, so its not a matter of “wanting” to do a 30fps sequence, its a matter of thats was used.)

I do know that, somehow, it IS possible for this footage to be projected w/o those artifacts, whatever is causing them, w/ simply a prores export because it was done before. A shorter version of the project was shown w/ the same settings and looked fine (unfortunately, I cannot get ahold of the projectionist who did so).

[Stu Gilbert]

Oh, sorry, should have mentioned….. it is just standard def DV, and (embarrassingly) I’m still on 6…

[Stu Gilbert]

is it possible that switching from vga to hdmi would have any impact?

[Bret Williams]

If it was all shot 24p, you really should edit 24p. You can copy all the material and paste it into a 24p sequence. You’re going to have all sorts of gaps and issues galore because of the rate difference. You’d have to manually go through and fix all the problems. But you’d have a proper 24p master for the web. And you could run that master through compressor to add the pulldown for a 30i version. FCP X is easier. Just drop it in a 30i timeline and export however.

Your best may be to just change your sequence to progressive and export. If that doesn’t work, then it’s definitely some sort of projector something.

[Steve Eisen]

If you want a little better quality playing your video to your projector, you should output your sequence to DV Tape. Use a DV deck and connect that to your projector.

Computer signal and video signal are VERY different.

Steve Eisen
Eisen Video Productions
Vice President
Chicago Creative Pro Users Group

[Stu Gilbert]

just went and looked, and it does seem to have some kind of pulldown… definitely has the 3, 2 thing happening….
i’m sort of leaning towards a projector issue at this point….. which may be worse, really.