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Can PAL DV be Upper Field first?
Using the method in the AE6.5 manual my footage seems to be upper-field first, yet Magic Bullet says lower-field first, and reading on the COW PAL seems to be always lower first. The footage definitely looks better upper first. Is this right?
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7 Replies
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It should be. I thought PAL DV was always upper field first.
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Don’t you guys have Google?
Googling PAL,DV,upper,lower led to:
https://www.creativecow.net/articles/onneweer_barend/deinterlacing/Steve 🙂
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Okay, so I read your post now, sorry …
… did you interpret the footage, separate, alt-click, then pageUp/Dn through the footage window to check the order? If it jerks back and forth, the separation choice was wrong.
Did someone do something to the footage before it got to you?
Are you sure it’s DV codec?Steve
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Yeah, I did the page up/down thing and it definitely jerks around with lower-field first yet Magic Bullet and the COW says it should be lower-field first…
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There are some other programs with bugs in them that
have to do with forcing PAL as lower field when it
should be upper.go with whatever works i say. 🙂
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Okay,
The technical specs for DV encoded video dictate that it’s lower field first.
So if you brought in your DV from a DV camera over firewire, using a native DV filetype, it should still be lower field first.
But if for instance you brought it into the machine using another codec, or using SDI instead of firewire, all kinds of things could have happened.
So if it looks good now with upper field priority, I’d go with that. But it’s not how it’s recorded to the original tape.
Bar3nd
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Are you using a Matrox card?
Matrox use upper field for PAL DV (lower for NTSC). I had a load of grief when I switched to Matrox from Canopus (who use lower for PAL) – suddenly all my AE work and stock footage was jittering all over the place.
I don’t think Magic Bullet actually analyses the footage for field order – it just looks at the file and asssumes that all DV is lower.
Matrox say that upper field for PAL is the spec laid down in the ‘blue book’ and that they have no intention of changing their drivers.
So much for standards…
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