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Trying to decide between 1080i & 720p

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Kevin Hedin
Trying to decide between 1080i & 720p
on Sep 6, 2007 at 5:27:46 pm

NOTE: Also posted in Panasonic Varicam forum.

So I'm transferring film to DVCPRO HD, and I don't know whether to tell the transfer house to choose 720p or 1080i. Since the HD signal is always 100Mbs, does that make one format better than the other? Also, I'm not sure what to expect when it comes to interlacing or pulldown if they transfer it to 720p. I've always removed a 3:2 pulldown from 480i material, but never had to do it with 1080i let alone 720p. So the question is, if I ask them to transfer to 720p60, will there be a 3:2 pulldown on the tape? Will I be able to edit in 24p if I want? Or should I choose 1080i?

FCP 6
AJA KONA LH
AJA IO


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walter biscardi
Re: Trying to decide between 1080i & 720p
on Sep 6, 2007 at 6:09:40 pm

The big thing to consider is whether you require Drop Frame or Non-Drop Frame for your edit. Apple still does not support Drop-Frame in 720p so we always cross convert to 1080i with our Kona 3 whenever editing Drop Frame in HD. I would rather edit in 720p as I love progressive over interlaced anyday.

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Kevin Hedin
Re: Trying to decide between 1080i & 720p
on Sep 6, 2007 at 6:22:48 pm

Non-drop is perfectly fine with me as the videos I create are not usually for broadcast, and the TV spots I create are only 30's and 60's. Since I haven't worked with film transferred to 720p, what will the tape look like? Since it's progressive, will there be the familiar 3:2 pulldown? Are there duplicate frames to remove? In the end, I will want to edit both native 720p24, and also deliver 480i30 for SD. I'm trying to find a workflow.

thanks.


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CharlieX
Re: Trying to decide between 1080i & 720p
on Sep 6, 2007 at 7:53:51 pm

Load it firewire, FCP can automatically load it as 24fps media (w the 24fps 720 capture option). The tape must stripe 60frames, but the duplicate frames are flagged so FCP knows to skip them.


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Marco Solorio
Re: Trying to decide between 1080i & 720p
on Sep 6, 2007 at 8:00:36 pm

[Kevin Hedin] "In the end, I will want to edit both native 720p24, and also deliver 480i30 for SD. I'm trying to find a workflow."

That is really the single most question you should always ask yourself... in the end!

If you shoot 720p24, you can down-convert it to 480p24, add 3:2 pulldown and bam, instant 480i60 (480i30 or 30i is an incorrect naming convention that gets used a lot).

I'm not a big fan of interlaced to begin with, so if it's 1080, I like 1080p24 as opposed to 1080i60. If the choice is 1080i60 or 720p24, I'd go with 720p24, but that's just me.

If you're going to DVD and/or the web, your 24p finished video will benefit as well.

Marco Solorio | CreativeCow Host | OneRiver Media | Codec Resource Site | Cinesoft | Media Batch



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Kevin Hedin
Re: Trying to decide between 1080i & 720p
on Sep 6, 2007 at 8:11:18 pm

Yes, 24p is definately preferable to edit with for all the reasons you list. What I don't know is if any Panasonic deck is capable of recording 720p24. I understand that you can shoot that format, but can the deck record it? I think it can only record 720p60, in which case I'm not sure how to deal with that from an editing perspective. Remember that in my case, I'm starting with film and am trying to tell the post house what format I want them to record in.

FYI, I will also be digitizing footage via SDI through the KONA LH. If I HAVE to use firewire I will, but I prefer not to.

Thanks.


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David Battistella
Re: Trying to decide between 1080i & 720p
on Sep 7, 2007 at 1:29:39 am



Whenever I have this choice, even with the SDX-900 I go with progressive images. Almost every piece of software that the footage will see (outside of FCP) prefers progressive images.

Interlaced should be banned and going progressive HD to interlaced SD will look good. The file ssizes are about thesame but given the choice I'd go progressive.

David



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