selftaught
07-07-2008, 01:56 PM
This may be a pretty generic question, but it was asked of me today and it got me nervous because I'm not entirely clear on the subject and I'm looking to export a feature out of my NLE soon (premiere pro) AND start on a new project - What's with video pulldown?
From what I understand, it's basically conversion from 24p to 60i, pulling 30 (or 29.97) frames down into 60 interlaced fields. If this is correct, why? Why would you want to take 24p footage and make it into 60 interlaced? Is it because TV's will only properly play your footage if it's interlaced?
Someone once suggested to me that I "remove pulldown" after capturing my footage into my NLE program. I did so, and the result was this ghost-type of effect, where frames were fading/bleeding into each other, so if the subject was to move from left to right, frame by frame I'd see his body ghost from left to right, and it looked terrible. What is the benefit, or even a reason, of removing pulldown?
Also, I have some trouble with interlaced stuff: Whenever I capture my 24 frame progressive footage into premiere, it looks nice and progressive in premiere, but the second I export it as a movie clip into my computer and watch it on my media player, I can see those interlaced lines in the footage. Now, in the export settings in premiere, I have the option of telling it to render either the upper or lower fields of my footage first, and there's a third option, which reads "no fields (progressive)" - even when I select that, (and this is when I'm exporting as Microsoft AVI with no compression) I'm still getting interlacy footage in my export. Why is this?
Does all this have to do with the format of 24fps I shot the footage in? I'm using the HVX (SD), and honestly I can't remember if I shoot in 24p advanced or native, but is this having an effect on my problems?
I suppose my overall question is, could someone give me a brief explanation of the why behind pulldown, (or send me a link that would explain it) If I should remove pulldown or not, (I burn my footage onto DVD's to be watched on standard definition TV's) and why I'm getting interlaced results no matter what I do and how I can fix that. Thanks for reading everyone, and please help if you can.
From what I understand, it's basically conversion from 24p to 60i, pulling 30 (or 29.97) frames down into 60 interlaced fields. If this is correct, why? Why would you want to take 24p footage and make it into 60 interlaced? Is it because TV's will only properly play your footage if it's interlaced?
Someone once suggested to me that I "remove pulldown" after capturing my footage into my NLE program. I did so, and the result was this ghost-type of effect, where frames were fading/bleeding into each other, so if the subject was to move from left to right, frame by frame I'd see his body ghost from left to right, and it looked terrible. What is the benefit, or even a reason, of removing pulldown?
Also, I have some trouble with interlaced stuff: Whenever I capture my 24 frame progressive footage into premiere, it looks nice and progressive in premiere, but the second I export it as a movie clip into my computer and watch it on my media player, I can see those interlaced lines in the footage. Now, in the export settings in premiere, I have the option of telling it to render either the upper or lower fields of my footage first, and there's a third option, which reads "no fields (progressive)" - even when I select that, (and this is when I'm exporting as Microsoft AVI with no compression) I'm still getting interlacy footage in my export. Why is this?
Does all this have to do with the format of 24fps I shot the footage in? I'm using the HVX (SD), and honestly I can't remember if I shoot in 24p advanced or native, but is this having an effect on my problems?
I suppose my overall question is, could someone give me a brief explanation of the why behind pulldown, (or send me a link that would explain it) If I should remove pulldown or not, (I burn my footage onto DVD's to be watched on standard definition TV's) and why I'm getting interlaced results no matter what I do and how I can fix that. Thanks for reading everyone, and please help if you can.