30p to 24p Blu-ray

MH_Stevens wrote on 4/9/2008, 8:30 PM
I've been shooting 24p HD with the EX1 and having very bad horizontal shaking at each side of the frame when zooming. I was told (even though I don't really believe it) that for smooth zooms I should shoot 30p. My question is as my delivery is via "burn to Blu-ray disk" how will Vegas convert the 30p to the 24p of the Vegas template. I don't want some sort of 3/2 drop-down that will give a poor result. What do I do?

Mike

Comments

Laurence wrote on 4/9/2008, 9:32 PM
30p and 24p are not going to mix well unfortunately. Of the two, 30p is going to look a lot smoother, especially on Bluray. There is no way you are going to mix them in the same project short of slowing down the 30p to 24p which will give you a slow motion effect.
Spot|DSE wrote on 4/9/2008, 9:39 PM
Not to mention that 30p doesn't convert to 24p very well at all.
MH_Stevens wrote on 4/9/2008, 10:01 PM
That's what I thought, but the Vegas "burn to Blu-ray Disk" does not have a 30p preset and no custom. So id I have 30p footage do I then need render with a custom 30p setting and then burn a 30p Blu-ray disk as a separate operation?

farss wrote on 4/9/2008, 11:50 PM
Why not then just make a 60i BD disk, which would actually be a 30PsF disk?
Laurence wrote on 4/10/2008, 5:20 AM
The only way to do it is with a 60i disc: You're going to have to introduce a pulldown on the 24p stuff though.
LJA wrote on 4/10/2008, 5:56 AM
To make a custom template for blu-ray, go to "render as", make your custom template (MC mpg), save it, cancel the render, and then go to "burn blu-ray disk", select "mpg", and select your custom template. This same technique, appropriately modified, can be used with Sony AVC.
David Jimerson wrote on 4/10/2008, 7:58 AM
"The only way to do it is with a 60i disc: You're going to have to introduce a pulldown on the 24p stuff though."

That is true, but Vegas has always been superb at taking care of that for you.

The one thing that I will note is that if you have a native 24p file -- as in it was recorded as 24p natively, and not in a 59.94 stream with pulldown added -- before you render as 60i, you need to disable the resample for the clip . . . else it will be resampled and will come out having motion looking much more like 60i.

This isn't a problem with DV or other 24p recorded in a 60i stream, because if Vegas treats it like 60i, it already has the proper fields in it to keep the correct cadence.
MH_Stevens wrote on 4/10/2008, 12:39 PM
Thanks guys. This native 24p project is 50% done so I will stay with 24p with this one and I'll just need to edit out the couple of zooms until I resolve that issue. Next project I'll shoot 30p and compare. Thanks.