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Footage more interlaced than before AE?
I have just finished doing some work for a client – but the client now says – and showed me BEFORE and AFTER pics – that prove the footage before the AE VisFX was less interlaced then after. Is this possible? Is there a switch or something that I should have turned on? The only thing I did with this footage was use a proxy, but had it turned off for the final render. Any help would be appreciated.
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7 Replies
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I’m not sure that there are degrees of interlacing, to my knowledge something is either interlaced or not. However, interlacing could be interpreted improperly. What are you doing to your footage in AE? Are you de-interlacing interlaced footage and then render back out to interlaced?
If possible can you upload a before and after still frame from the project?
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
Interlaced footage has to have its fields separated (file>interpret footage>main>separate fields) in order to scale, move, rotate, blur, or otherwise distort the footage.
If the fields are not separated, you’ll see multi-combing, which may be your problem. If so, you need to go back to the original interlaced footage and separate fields.
Check the Help for more info.
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I will try that and let you know.
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Ok, it tells me the Separate Field are OFF – not sure why that is…what should it be changed to?
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Most interlaced stuff is lower field first nowadays. Just to be sure, do this:
1. interpret the footage and separate fields.
2. Alt-double-click on the footage.
3. In the window that appears, step through the footage using the PageDn key. If the footage moves in one direction, you picked the right field order, and you can close the window and go back to work. But if the footage goes back and forth as you step through it by hitting the pageDn key, you picked the wrong field order, and you need to re-interpret the footage, picking the other field order.Just for fun, pick the “wrong” order, so you can see the footage go back and forth.
By the way, other apps call this “field dominance”, but it’s really “field order”.
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Ok, I saw what you meant. Upper field was the way to go. I wonder why AE didn’t interpret the fields as Upper when it first did it? It choose “none” for some reason…
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There’s a file called “interpretation rules.txt” in your AE directory, most likely. It contains a list of video file types and characteristics along with the interpretation AE chooses when it encounters those files. If you work with these upper-first files a lot, you might want to alter that file.
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