more to 24pa then frame rate?

L

licoricebandit

New member
Hi everyone, I am editing a feature that was shot haphazardly over the course of 3 DP's the footage is in turn about half 24pa and half 29.97, there seems to be more of a difference between the two pictures then just frame rate, and all of the unconcious visualizations that come with that. Even when the 29.97 footage is converted, through nattressm to 24p it looks like video (soap opera) while the 24pa stuff looks beautiful.

So I have now been put on the job of making the 29.97 footage match the other footage, my question is what else technically would be different between the two? Gamma? which levels? what else, can someone guide me to the video attributes I would need to tweak to get them matching?

Thanks!!

Phillip
 
Were they all shot on the same camera (dvx)? I would check the settings in the camera if they were since the scence files may have had different settings. I am assuming that your 29.97 was shot interlaced? That would make it look entirely different than the 24p.
Part of your differences will also be the result of the nature of 24p - more motion blur, etc. When you say the 24p looks beautiful - how does it differ from the other footage. Those are the qualities you are going to have and try to mimic in the other footage. I don't know that there are just a few settings you change to match them - you'll have to get creative!
 
Phillip,
Sorry i don't have an answer for you, just a question. You mention converting 29p to 24p through nattressm; what's that?
dvxwheelr
 
Yes, are they shot on the dvx? Because DVX has some Cine-Like Gamme and Matrix to mimic film better. Is your 29.97fps 30P or 60i?
 
when I was looking through this site last night after posting I discovered the idea of the scene settings (f1-f5) and that setting it to 24pa also means a bunch of gamma and other settings changes, it was all on the same camera, so if I were to get it would i be able to pull up the settings on the camera and just match gamma settings and the others? or will it say something like "cine-like filter" and not tell me the exact settings?

****Sorry i don't have an answer for you, just a question. You mention converting 29p to 24p through nattressm; what's that?****

sorry meant nattress, its a frame rate conversion filter.

****** I am assuming that your 29.97 was shot interlaced? That would make it look entirely different than the 24p.
Part of your differences will also be the result of the nature of 24p - more motion blur, etc. ****

thats the question can someone list the exact differances? but at the same time I converted all the 29.97 footage to 24p and it still looks very different?
 
All video shot on the dvx ends up on the tape at 29.97 fps. How it gets there in each mode is different.
I'll attempt to explain and someone correct me it I miss something.

60i - standard video -- pretty simple, you get 30fps but thats actually 60 interlaced fields - an even and an odd for each frame. The easy way to see this is to look at an object in your video that is moving, if it's 60i you'll most likely see a sort of combing effect on the edges of the moving object - this is where the fields are showing themselves since they were captured roughly 1/60 of a second apart.

30p - you get 30 full (progressive) frames captured each second - they are recorded to tape as even and odd fields but because they were captured at the same instant there is no combing - it's a full frame - and thus can be reconstructed by an editing program if it is told it's progressive frames. You'll get nice, clear frames if it was shot in 30p.

24p - again full frames just 24 of them a second. The thing here is that it is still recorded at 30fps. This is done through a 3:2 pulldown. This is where the camera basically creates frames through a combination of other frames in a 3 whole frames, 2 split frame sequence. This can be removed in post but there is some loss because not all the whole frames are completely recoverable (some fields are lost in the split frame part)

24p advanced - uses a 2:3::3:2 pulldown. This is done so that all the full frames are able to be recovered in post.

There are a number of resources online to really figure out the pulldowns...

hope this helps :)
 
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