24P interlace issues
- Thread starter jordini99
- Start date
no. i was under the impression that video shot in progressive scan did not need de-interlacing. am i wrong?
I'm talking about 24P (non-advanced) edited in 29.97
I shot 24P in squeeze mode. Sequence frame rate is 29.97
field dominance is set to "none"
Well, shooting 24p rather than 24pA, and editing in a 29.97 time line, means that you are working with (partially) interlaced video. While the camera was shooting in a progressive frame rate, certain frames will be interlaced due to the pull-down. Yes, 24p is designed for editing in 29.97, but it isn't true progressive.
24pA, since the pull-down is typically removed upon capture, will restore to a true progressive signal.
24p has a 3:2 pull-down, intended to be edited in a 29.97 time line. 24pA has a 3:2:2:3 pull-down, anticipating that the pull-down will be removed and the video edited in 24P (which is really 23.976, or 23.98).
Both are recorded to tape at 29.97. Both can have the original 24p images extracted. 24pA makes the pull-down removal much, much easier.
Read here: http://www.kenstone.net/fcp_homepage/24p_in_FCP_nattress.html
Joshua Provost
Veteran
No, you need to conform your source material to actual 24p prior to editing, then edit in a 24p timeline.
No. Never deinterlace 24p material (or any progressive material, for that matter).
What were your export settings to H.264?
What were your export settings to H.264?
Ok, here is the reason I suggested that you de-interlace before exporting if you are having problems with interlace artifacts: A while back, I was trying to put one of my shorts (shot in 24p squeeze) onto Vimeo. The video looked just fine on my computer, but once it was uploaded to Vimeo, it was full of interlace artifacts. I tried several things to remedy the problem without success. Finally, out of desparation, I tried de-interlacing the video before exporting to Vimeo and it worked. Here is the result:
http://www.vimeo.com/1868373
http://www.vimeo.com/1868373
It's only because you originally shot 24p standard instead of 24pA. Please don't read this as being snappy; it's not -- I'm just being straight. I understand that you're new at this and I'm trying to help you learn.
What you should have done from the outset is shoot 24pA. The only times you should really shoot 24p standard is when you can't edit in 24p -- you don't have an NLE which will do it -- or when you're mixing with other footage -- 60i, 30p -- and MUST edit on a 29.97 timeline.
Otherwise, if you are planning for 24p and only 24p, shoot 24pA and edit 23.98.
Another reason people are saying to edit as 29.97, now that you shot 24p standard, is because FCP makes it a hassle to edit the 24p standard as 23.98 instead of 29.97. FCP can't automatically remove the 24p standard pulldown, so you have to remove it manually, using Cinema Tools. Every other major NLE will remove the 24p standard pulldown and let you edit as 23.98 with no problems, but with FCP, it's a pain, so people just edit as 29.97.
But if you do that, you'll have interlace artifacting in some frames. If you don't want that, then you have to remove the pulldown and just edit as 23.98.
Which is why you should shoot 24pA from the getgo.
(And frankly, because it comes up so much, I'll just come out and say it -- if FCP would get with the program and just let you remove 24p standard pulldown automatically, like everyone else does, then pretty much all of the confusion over this would just disappear.)
So, in the future, shoot 24pA.
For this project, if you want to get rid of the interlaced frames, you'll have to go back, conform the footage using Cinema Tools, re-edit the project (shouldn't be that difficult), and then you'll have only progressive frames; no interlacing issues.
Or, you can just live with it this time around and do it differently the next time.
Or, you could deinterlace, but you'll lose resolution by doing it, and you may end up with choppy motion or ghosting around moving objects.
Northainan
Active member
It's only because you originally shot 24p standard instead of 24pA. Please don't read this as being snappy; it's not -- I'm just being straight. I understand that you're new at this and I'm trying to help you learn.
What you should have done from the outset is shoot 24pA. The only times you should really shoot 24p standard is when you can't edit in 24p -- you don't have an NLE which will do it -- or when you're mixing with other footage -- 60i, 30p -- and MUST edit on a 29.97 timeline.
Otherwise, if you are planning for 24p and only 24p, shoot 24pA and edit 23.98.
Another reason people are saying to edit as 29.97, now that you shot 24p standard, is because FCP makes it a hassle to edit the 24p standard as 23.98 instead of 29.97. FCP can't automatically remove the 24p standard pulldown, so you have to remove it manually, using Cinema Tools. Every other major NLE will remove the 24p standard pulldown and let you edit as 23.98 with no problems, but with FCP, it's a pain, so people just edit as 29.97.
But if you do that, you'll have interlace artifacting in some frames. If you don't want that, then you have to remove the pulldown and just edit as 23.98.
Which is why you should shoot 24pA from the getgo.
(And frankly, because it comes up so much, I'll just come out and say it -- if FCP would get with the program and just let you remove 24p standard pulldown automatically, like everyone else does, then pretty much all of the confusion over this would just disappear.)
So, in the future, shoot 24pA.
For this project, if you want to get rid of the interlaced frames, you'll have to go back, conform the footage using Cinema Tools, re-edit the project (shouldn't be that difficult), and then you'll have only progressive frames; no interlacing issues.
Or, you can just live with it this time around and do it differently the next time.
Or, you could deinterlace, but you'll lose resolution by doing it, and you may end up with choppy motion or ghosting around moving objects.
WWW.Adamwilt.com need to update his web page. LOL LOL Some new users go to that page and see where he says that of you are going straight to DVD then shoot 24p but if you are going to film shoot 24PA.(http://www.adamwilt.com/24p/index.html#When_to_shoot)
I believe he posted that way before Adobe Premiere 1.0 version and other software that can edit DVX100A,B,etc,footage . I don't know if that's in a sticky here on DVXUSER. but if it was it could end a lot of confusion for noob's.