How to deinterlace in Premiere Pro 2?

MatthewC

MatthewC

Well-known member
Hi,

I have Premiere Pro, and I imported my 24P footage into PPro 2. The import settings are set to 24P.
Sadly, whenever I export this as .mov or .wmv files there are interlacing issues like the below:

interlaced8gt.jpg


Now I thought that because I was doing it in 24P there should be very little interlacing showing up, but this is basically non-stop. What is going wrong? The source video looks perfect in the monitor and when played straight back. How can I fix this?

In the settings, should I click "Allowed Interlaced processing?"
In the Field options should I select "No Fields (Progressive?)?

I'm just curious what you guys shooting 24P do to get your .mov and .wmv exported without any issues like I'm having. The source footage is perfect.

Here's my settings for my latest Quicktime attempt. Notice the perfect video on the left.
settings2mr.jpg


I also exported my video as an MPEG2 video and it seems very jittery...
 
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It seems like exporting it as anything but MPEG2 at 29.97 or as a straight DV AVI I get interlacing up the ass. It's horrible.

How do I fix this? Why does it do this?
 
Matthew,

I'm running PPro2, and am trying to get some deinterlacing things worked out too, so i'm in a similar boat.

Double check your project settings. I'm pretty sure that even if you select "No Fields," Premiere defaults to "Even fields First."

Heres the other thing I noticed in your screencap...

try checking the "Deinterlace" box in the top right of your window, directly under your "Output" tab.

Don't select "Allow Interlacing." I'm assuming you WANT deinterlaced or progressive video.

Hope this helps,
triple
 
I think your "perfect video" example looks fine because you're doing it at half resolution. Dropping your vertical resolution to 240 from 480 is throwing away every other field, which is going to have the effect of removing your interlacing.

Whatever format you're exporting to, make sure you're exporting to 24fps, not 30fps or 29.97fps. If you export to 30fps (or 29.97), Premiere has to implement a pulldown system that distributes your 24p frames over different fields, which DOES cause interlacing (this will look great and provide cinematic motion on a standard TV though).

Also, don't get tricked into thinking "24p" DV AVI is truly 24p. The footage on the tape (and on your hard drive) is 24 frames distributed over 60 interlaced fields. Premiere reverses the pulldown and shows you the 24 progressive frames that it has extracted frmo the 60i video. Similarly, if you export a DV AVI and then view the results in Premiere, it will look to you like it's truly progressive. Check the results in Windows Media Player or some other player to make sure (not a DVD player program though, those often have deinterlacers built in).
 
I dont get this. You say to make sure I'm exporting to 24fps. To do that I need my project settings at 24PA (which forces 23.97)instead of DV NTSC (which only selects 29.97). But when I export that way into straight DV AVI or MPEG 2 I get interlacing. I view it in WIndows Media player afterward.

However, if my project settings are 29.97 then I get no interlacing issues for DV AVI or MPEG 2.
 
overnighttolondon is absolutely correct. You need to export a 24p project as a 23.976 video, not 29.97. It has nothing to do with your project settings. Your project can be set at 24p (23.976) but when you export to mpeg2 or whatever codec, if you select 29.97, peremiere introduces pulldown which causes interlacing on computer monitors. You need to export as 23.976 from a 24p project.
 
Morgan_Rozender said:
overnighttolondon is absolutely correct. You need to export a 24p project as a 23.976 video, not 29.97. It has nothing to do with your project settings. Your project can be set at 24p (23.976) but when you export to mpeg2 or whatever codec, if you select 29.97, peremiere introduces pulldown which causes interlacing on computer monitors. You need to export as 23.976 from a 24p project.
Click to expand...

In addition to picking 24 as his export frame rate, couldn't he also choose "same as source"?

Also, what's up with the small black bars above and below his export preview video? 320z240 doesn't go into 720x480...does that have anything to do with it?
 
tripleAAA said:
In addition to picking 24 as his export frame rate, couldn't he also choose "same as source"?

Also, what's up with the small black bars above and below his export preview video? 320z240 doesn't go into 720x480...does that have anything to do with it?
Click to expand...
Yeah, my ratios aren't set correctly. I can trim that up, it should be 360x240, but I was rushing things trying to simply get this interlacing done.

Thanks again guys. I think this is going to work.
 
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