30P or 60I for Slow Motion?

D7K wrote on 8/18/2014, 11:55 AM

Isn't 30p actually the same as 60i for slow motion? I don't have 60P on my DSLR but do have 30P and 60i, wouldn't I be better off using 30P? I do have 720P 60 fps and I guess I could uprez or black box it. Any opinions?

Comments

Chienworks wrote on 8/18/2014, 12:54 PM

Not at all. 30p captures 3 images per second. 60i captures 60 images per second, though each one is at half-resolution.

If you're going for smoother motion then 60i is a much better choice.

D7K wrote on 8/18/2014, 1:39 PM

Thank you. I was under a misconception about 60i in how it worked technically. Will try it soon to see how it goes.

Tim L wrote on 8/18/2014, 4:04 PM

[I] 30p captures 3 images per second.[/I]
I sure Kelly meant "30p captures 30 images per second".

You mentioned 720-60p, and that would probably be your best bet, as it will give you 60 images per second with 720 pixel rows of detail each. Assuming you are talking about 1080-60i, each 60i "half image" will have 540 pixel rows of detail.

Chienworks wrote on 8/18/2014, 4:30 PM

Thanks Tim!

musicvid10 wrote on 8/18/2014, 4:42 PM

For slow motion, shoot 60p, then double its length in a 30p project.

musicvid10 wrote on 8/18/2014, 7:30 PM

Looking at your post again, you may be remembering a discussion about bob deinterlacing. Takes 60i (29.97i) source and makes it 60p by interpolating fields. Welcome to try, but not natively in Vegas afaik.