24p footage imported into 29.97 timeline.

D

dsk

Active member
Hi All -

what (if any) are the downfalls of importing standard 24p footage and working on it in a standard 29.97 setting in FCP 4.0. My computer is a bit on the slow side and I cannot do a quality pulldown because of the slower processor. Image looks fine... I just want to make sure I am not missing something.
 
Re: 24p footage imported into 29.97 timeline.

The only downfalls you will have is if you have to adjust the speed of you video. If you do not plan on adjusting speed, and your footage was shot in standard 24p, not 24p Advanced, then you shouldn't run into any problems. I just finished a short film by shooting in 24p and editing at 29.97. Everything worked great.

If you shoot standard 24p then you should not be removing the pulldown, because it does not match with the pulldown that the camera applied and you would be removing original progressive frames.

On the other hand, if you shoot 24pAdvanced then you should always be removing the pulldown in FCP and editing at 24p. The "Advanced" pulldown was not designed to be directly shown on tv "as is". It was designed to allow the computer to easily calculate which frames to remove from the imported video.

Hope this clears things up for you.
Any more questions, let me know.
 
Re: 24p footage imported into 29.97 timeline.

J.T.

Thanks for the response. I think I understand what you are saying... But just to clarify....

Are you saying that if I import 24p into a 29.97 setting I cannot change the speed of any clips?

Say I tried to slow a clip to say 60%, what would happen?

Is there a work around? (outside of buying a G5)


Thanks again.

Dave
 
Re: 24p footage imported into 29.97 timeline.

Yes you can change the speed of the clips. I do it all the time. I slow them down and use time remap to speed them up. I am editing 24p on a 29.97 timeline.
 
Re: 24p footage imported into 29.97 timeline.

Problem is that, even though I don't know how to explain this, if you shot 24p advanced(f6) and edit it directly at 29.97 without pulldown removal, the way it translates the footage is different, and it will blend together frames every not sure of the number frame. You won't be able to see it on your computer, but if you hook up a tv to your computer you'd notice a glitch every now and then. Sometimes the glitch would be almost unnoticeable, sometimes it might stand out. If you were to go frame by frame you'd see frames between cuts merging together for one frame before moving onto the next cut.

If you shot 24p normal(f5) go ahead and edit 29.97, no problems at all, it was meant to be done this way.
 
Re: 24p footage imported into 29.97 timeline.

It's not that you can't adjust the speed. It will work like any other video file. It's just that the video can look as if it is stuttering depending on what your speed settings are at. The main reason this occurs is because the camera creates "jitter" frames every once in a while to bring the footage on the tape from 24fps to 30fps. So, the frame that it makes is a mix of the two frames nearby it. So now we have that down.

When you slow down the video it also does a similar thing. It will create frames from surrounding frames. The stuttering comes in when it creates these extra frames from the frame that the camera made up earlier. In essence you are copying copies.

Hope that makes some sense.

But...it really comes down to you trying it with your footage. It may occur worse on video with fast movement compared to video with slow movement before you adjust speeds. When you are making your adjustments, always check them on an external NTSC monitor because your computer monitor may not show the same amount of stuttering.

So, the answer is YES, you can adjust speeds just like any other video. BUT, there is the possibility of running into some issues.

Hope that helps.
 
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