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24p editing interlace lines
I am having an issue with seeing horizontal bars (interlacing lines I guess) in my clips when there is movement in the frame. This only happens when I place a clip in the timeline and play it that way, not when it is simply imported and I play it in the browser. I shot on a panasonic dvx100b at 24p normal, and have tried multiple import and sequence settings to no avail. also, the footage is anamprphic, so that complicates matters. Has anyone had this problem, and or know how to solve it?
Thanks so much,
Evan -
7 Replies
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Hard to tell from your description.
24p on the DVX does indeed bring interlacing into play as it is using a 3.2 cadence adding interlaced frames to make it add up to 30.
Is this what you are seeing? Are you watching it on an external monitor? Does it bother you there?
CaptM
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So I just went back into final cut pro and hooked up my external mo nitor, and as it turns out, I don’t see the lines at all on the monitor, but still see them on my screen (I am running final cut on a powerbook). Does this mean that even thoguh I see the lines on the computer when playing clips, it is not a problem?
Also, best way to capture the 24p normal anamorphic footage? Varying posts online say so many different things. Should it all be captured and edited at 29.97 fps? or is there a better way?
Thanka a bunch.
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depends on how you set up your sequence.
24p is interlaced on tape and the pull down that is applied has to be removed when you capture the video. Or you can leave it interlaced and has the 3:2 pull down look of film transfered to tape (sort of). But it created a DV-NTSC – 24 sequence and then put your 29.97 interlaced footage into it – it won’t look right.Also, for your sequence settings, try DV NTSC Anamorphic, unless you don’t want your final output to be anamorphic, in which case you will have to change the size and distortion of the clips so they appear as letterboxed footege in standard DV frame.
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so try capturing dv ntsc anamorphic (which will be 29.97) then place the fottage in a normal 29.97 sequence? Also, i tried viewing on a monitor, and do not see the interlacing, but continue to see it in the same clips on my computer. should i just ignore it?
thanks. -
It really depends on what your final out will be as to the workflow you want. 24p IS 29.97 footage. The reason for shooting that way is to maintain a pleasing 3.2 cadence when watching on a TV… this is what TV stations add to film to show it on TV… it’s called telecine. BUT – it has its drawbacks. You must edit on cadence or you’ll end up noticing it. So…
Here’s what I believe and do…
I shoot 24pA and remove the advanced cadence (yes, 24pA is also 29.97) on the fly as I capture it in FCP.
Then I edit in 24 fps with no worry about cadence splicing. Then, if I want to send it out for broadcast I lay it back to tape with FCP adding the 3.2 cadence TRUE across the whole edit.
If you’ve shot 24p mode and still want to do this it’s an easy fix. Load the captured material into Cinema Tools and remove 3.2 cadence there… then proceed.
CaptM
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>>You must edit on cadence or you’ll end up noticing it.
Not unless you jog field by field.
Honestly, I continually see this misinformation posted here, and it’s complete nonsense. Until the advent of HD, film based television programs were edited in NTSC with no regard to cadence issues and it was never a problem. This was done for at least 15 years. Even today, it’s still occasionally done.
Just reading something on an Internet website doesn’t make it true.
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Point taken. You won’t see that come from me at least again.
Thanks
CaptM
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