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Mixed interlaced footage
Hi,
I would have bet, that these forums already provide the answer, but after skimming through 692 search results, I found nothing to answer my question.
In the production of a DVD I have numerous clips from different cams (consumer-grade camcorders, DVX100, HMC151, Betacam) so I end up with progressive and interlaced (both upper and lower field first) clips in the timeline. The progressive footage does not worry me, for it will export fine to a DVD (interlaced). But the different kinds of interlaced clips worry me. Am I right to assume, I need to deinterlace for example all upper-field-first-clips before importing them into premiere, so that this de-interlaced footage will be fine, when I export all as “lower field first”? Don’t I loose a lot of quality that way? Is there a shortcut? Is there an “interpret the footage” option in this respect?
What work flow do you suggest when working with so many different kinds of files?
Thanks,
Johannes -
5 Replies
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Either you make all your footage progressive or interlaced.
If you use interlaced all footage has to have the same field already in the timeline otherwise you will have the dvd not playing correctly. The export has to be in the same field as the timeline. -
Let’s look at the DVD first. You can have mixed footage, even as part of the same VOB, they just have to be separate files. That may help you make some choices if long sections of an edit are mostly or all of one type. If you cut and export strategically, you can always add those together on an Encore timeline or as different chapters. A player is supposed to correctly play mixes of anything upper lower, interlaced, and progressive as long as your clips are independent of each other, of the same frame size and same frame rate. Of course, you also have to tell the authoring app not to transcode your Mpeg2 DVD from Premiere.
As far as cutting mixed footage within Premiere, you’ll have to look at what you have the most of. HD for example can be de-interlaced to SD without much quality loss, unlike SD. Not sure about mixing upper and lower these days. Yes you can interpret the clips independently, but I think I remember an issue on export a few years back. It may be fine now. Just try it on a short sample.
Vince Becquiot
Kaptis Studios
San Francisco – Bay Area -
You can mix upper and lower in the same timeline. If the timeline is set to upper you need to change the field dominance of all the lower field clips. Either done in the Project Window (Interprete footage) or on the timeline (Field Options).
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Thanks for the tips,
@Ann
I’m not quite sure regarding your posts. Can I have uppers and lowers on the same timeline (as your 2nd post suggests) or not (as your 1st post states, if I read it right) – or is the problem created when I bring in progressives? -
Hi!
I will now explain it to you very detailed:
Situation 1:
If U have upper, lower and progressive footage combination, it is best to deinterlace interlaced footage, and make everythink progressive. In that way footage will have the same look and feel.
Situation 2:
Mix of upper/lower field footage
Lets imagine that U have sone outpot card for monitoring (Blackmagic, AJA, Matrox…)
Pick up your project settings (example Blackmagic DV – upper field).
Puit your clips on timeline and play.
OK, now U see that your clip 003.mpg is different field order (lower) as other clips.
Go to project window, right click on clip and go to INTERPRET FOOTAGE. Choose for this clip to be in upper field, and click ok.
Repeat this procedure to all clips that are in different field order than your other timeline clips.Thats it….
Cheers!
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