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Timeline confusion when working with footage shot on 24p
Hello, I apologize if the answer is already somewhere on CreativeCOW, but I searched for long time and couldn’t find the answer I needed. And this is kinda n00b.
I have footage I shot on a Panasonic DVX, at 24P. Now I would assume that in Avid, when starting a new project, you would choose that you are working with NTSC 24P. However, I had a co-worker explain that even though the footage was shot at 24P, it still is being recorded to a MINI DV tape, which is itself only 29.97fps and thus in AVID would have to choose the NSTC 30i option…or something like that. I have a feeling he’s full of it.
So can anyone just clarify? And if I’m right and I do choose 24P, why wouldn’t I choose 23.976 (the difference?), and what will I have to do with pulldowns? Thanks!
System Specs:
WinXP SP2 3.0ghz
Pentium D 4gb Ram
320gb RAID O
>1TB external storage -
1 Reply
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Hi,
24P on the DVX100 is really at 29.97 with a pulldown. There are actually two different versions of how this is accomplished. One is a standard 2:3 pulldown and you should be very careful on where you place your edits as it will impact any further encoding that might happen with say a render to DVD. It does have all the look of 24P but the sequence should not be disturbed, unless you render out the 24 frames.
The second version of a 24P is called 24PA and this has a 2:3:3:2 pulldown. This should be easily extracted into the Avid media bins on digitizing. This sequence can be easily determined by looking at the video. The frames should look like this AA BB BC CC DD. In the 5 frame sequence there will only be one that has a field of one and a field of another. The other four will be solid progressive frames.
If this is not what you have as you look at the footage, and you have 2 frames that are interlaced, then you have the standard 2:3 pulldown.
The reason we did it this way was because no body wants to have to go out and buy new stuff just to watch a 24P timeline. We made the standard video recording device record 24P over 60i.
Hope this helps,
Jan
Jan Crittenden Livingston
Product Manager, HPX500, HVX200, DVX100
Panasonic Broadcast & TV Systems
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