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30fps
Trying to set up a 30fps (Non Drop frame) project in Premiere and when the project is set for 30fps I cannot get playback and nothing comes through the Decklink. If I set to 29.97 then I get playback. Is this right? I want to run without dropframe so everything should be set to 30fps, no?
Thanks.
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6 Replies
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Nope, the two things are not related.
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Hi,
Dropped frame refers to the way timecode is counted and does not actually ‘drop’ a frame in the video. The number of frames in a dropped frame video sequence is exactly the same as the number of frames in a non-dropped frame sequence given that both have identical content.
regards
Kristian Lam
Blackmagic Design -
To expand, drop frame numbering accounts for the fact the the video is (in both cases) actually running at 29.97 FPS. Over time, this causes non-drop numbering to drift away from real time. About 2 seconds over the course of an hour, if I remember correctly.
-jeff
Jeff Brown
Fire Mist Media
http://www.firemist.com -
Thanks to all for the replies. I understand that the two formats have the same material etc. but it’s confusing that my movies all say 29.97 when actually I’m working exclusively at 30fps. Or trying to anyway. I’ve been using Video Toaster up until now which is Drop frame only (!) so I’ve been used to everything having a 29.97 tag on it. Problem comes in some of my composites where is it’s setup at 30fps (which all our cg is rendered to) then the digitized footage comes in at 29.97 there is sometimes an interpolated frame if the scene is long enough. Then I have to manually change the footage setting to 30fps even though the file itself has 29.97 embedded in it. Not a huge problem but an inconvenience to be sure. Am I making sense? Does this make sense? Thanks again.
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I’m not sure about your workflow but we interpret the 30fps CG to 29.97fps not the other way around. If we’re giving the CG guy video to match to we change it to 30fps, he matches his stuff to that and we convert his renders back to 29.97. It sucks that neither 3dsMax or Maya support the real framerates but as far as I know there is no such thing as video at 30fps, no tape format that I know of supports it at least.
Glennser -
Well, as CG is output as a series of sequential stills (even if packaged as QTime), there is no real “framerate” to it. Just tell the editing app it is 29.97 when you import it, all should be well.
-jeff
Jeff Brown
Fire Mist Media
http://www.firemist.com
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