Can someone show me slow mo on AE??

[reflex]

If been trying to get that nice slow motion from 60i footage but I can't really tell if I'm getting the right end result, meaning, I don't know if my footage is really going as slow as possible and if I'm getting a full frame from every half field.

I have AE 6.0 professional. Could someone give me a quick , correct, rundown of how to get this working? Its seems to be where you just export your video from your editor ( in my case premiere pro ), twice once starting wtih the lower field and then secondly starting with the upper field , then put those clips in the after effects or something?

Can someone explain? :huh:

 

[reflex]

well i reread that tutorial from rarevision. So its' just as easy as.. this?

1) in AE setyour timecode base to 24
2) import your clip
3) interperet footage as 24fps and set it to Lower field first
4) time strech your footage to 200%
5) render

is that it?

What if you need to export it back to put in with other 60i footage in a 29.97 timeline? Will that screw the clip up? I would guess not unless you interperet that slow mo footage is should be fine right?

 

[surf]

Ctrl+alt+t ?

 

[Matt Grunau]

A whole hell of a lot depends on how slow you want to make your clip. Anything below 60% is going to begin to look odd. What you can do is enable frame blending, and follow the slow down techniques in Barry's book for 60i. Apart from that, if you need to go slower, you can try this:

open your clip in your project window. Then, open another copy of it so there are two. right click on one, interpret footage, and change it to upper field first. Enable the edge option also (High quality only) on both clips.

Drag your lower field first into your comp, and then put the upper field first clip on top. Lower the opacity of your upper field first clip to 50%. You are effectively blending the top clip which is one frame ahead because of the difference in interpretation. This will not only give you more motion blur (well, the appearance of it) but will give you some extra frame padding to slow down even more. you can nest that comp into another and enable frame blending which will further buffer it.

 

[Login418]

How is this done in FCP5?

I want to do slow-mo with 60i footage on a 23.98 time line. I read Barrys book but my results are very jittery and sometimes frames are repeated in the sequence.

What are the specific menu settings to make this work? Here are my settings:

DVX100a 60i 1/120 and 1/250
Capture Preset: DV NTSC 48 kHz
Sequence Preset: DV NTSC 48 kHz - 23.98

Modify -> Speed -> 40% (frame blending on or off?)

PLEASE HELP!!

 

[reflex]

Drag your lower field first into your comp, and then put the upper field first clip on top. Lower the opacity of your upper field first clip to 50%. You are effectively blending the top clip which is one frame ahead because of the difference in interpretation. This will not only give you more motion blur (well, the appearance of it) but will give you some extra frame padding to slow down even more. you can nest that comp into another and enable frame blending which will further buffer it.

An unfortunate product of frame blending is the introduction of unnatural motion blur. This blur would not exist in real high-speed photography since it would be impossible to expose the film at less than the frame rate, and at frame rates of 60-100 frames/sec, you would not get much motion blur. In fact, you wouldn't even be able to expose the film at either 1/60 or 1/100 respectively, since the rotating shutter in a film camera cannot be open 360 degrees.

I would assume that you'd keep frame blending off. :undecided

 

[Lucerna]

Read this it might interest you

http://www.creativecow.net/articles/solorio_marco/twixtor_review/


Chao

 

[Matt Grunau]

An unfortunate product of frame blending is the introduction of unnatural motion blur. This blur would not exist in real high-speed photography since it would be impossible to expose the film at less than the frame rate, and at frame rates of 60-100 frames/sec, you would not get much motion blur. In fact, you wouldn't even be able to expose the film at either 1/60 or 1/100 respectively, since the rotating shutter in a film camera cannot be open 360 degrees.

I would assume that you'd keep frame blending off. :undecided

You didn't say you were looking for a high speed photography look, only that you were wanting to slow down 60i. unless you had set your shutter speed very high (and 1/60 and 1/100 are NOT fast shutter speeds) you are going to be dealing with motion blur.

With that in mind, the only way to use AE without plugins to get a good slow down and not look choppy or "slowed down" is to AE's native abilities, some of which I suggested. You will need a certain amount of blur to hide the fact that you are shooting 30fps at 1/60 or 1/100, if you want it to have any smoothness to it.

Film cameras most certainly can be exposed at shutter speeds of 1/60-1/100, even with a low speed film like 100 ISO. Neither of those shutter speeds are considered fast.

So, if you are dealing with footage already shot with the usuall 60i camera settings, you are not going to get the "high speed look", because your camera wasn't set up for it. And unless you can find a video camera to shoot much faster than 30fps with a shutter speed of 1/500+ you aren't going to get it.