shooting using 24fps or 30fps for slow motion?

[Tfortier]

yo! a good way to do an excellent 2x slowmotion is to shoot in 60i and separate your field in frames with reelsmart fieldskit… 1fr/2fields = 2 frame. you loose a bit of resolution (just like if you deinterlace) but you get absolutly smooth result.

good luck!

t

[Leon Klein]

just to be sure sure, 60i means 30fps right?

thanks

[Steve Roberts]

Well …

30p means: shot at 29.97 fps, with each frame shot as a full frame, every 1/30th of a second. 30p means 30 images per second, progressive.

24p means: shot at 23.976 fps, with each frame shot as a full frame every 1/24th of a second. Then the frames are split and interlaced together in a process called “pulldown” to make 29.97 fps footage on tape. This process can be reversed in post — it is called “removing pulldown”.

60i means: shot at 29.97 fps, but each frame is shot as every other line, every 1/60th of a second. Each of these “half-frames” would look as if you’re seeing the image through venetian blinds. Then the images are interlaced together. 60i means 60 images per second, interlaced. It’s really 59.94. On TV, these two images are played in quick succession, giving the impression of smoother motion. It’s the “video look” as opposed to the “film look” to many.

(by the way, when people say “30” and “60” with video, they really mean “29.97” and “59.94”)

So if you separate those interlaced images, then fill in the missing lines, you’ll have 60 full images per second. Play them at 29.97 frames per second and you have slo-mo.

Does that make sense?

[Jesse Grable]

Wow. I’m not sure if OP found this helpful, but I sure found it insightful. Thanks a lot!

Jeremiah J. Genin

[Leon Klein]

Thank you!

basicaly i could use shoot in 60i and use reelsmart fieldskit to get a very good slow motion but loosing resolution.

or

shooting at 30 and using after effect and get adecent slow motion?

[Dan Pollock]

If you are going to use software to create slo mo its best to shoot 60i. Reason being you loose some temporal resolution by not doing so. Use something that will extract 2 frames per field, fields kit TMPGEnc etc. Bring that into your editor and do any slo-mo effects then render it back out at 30fps progressive. Its usually good down to 20% of normal speed unless you are panning against something that has lots of detail then it tends to look choppy at the slower speeds. Best thing to do is you have the camera to do it is blur the background on any slo mo stuff you are going to do if you are panning. I use the velocity envelopes in Vegas pro 8 to do the actual slo mo. That way its not a sudden slo down you can ramp it up and down for a better effect. Twixtor is good for doing slo-mo but its expensive.

Griz