How to make a video slow gradually

madbunny · Post by **madbunny** » Thu Jul 31, 2003 2:20 am

I need to take a clip and have the speed slow down gradually and smoothly to a freeze frame.

Does anyone know how to do this using Premiere?

TokyoU15 · Post by **TokyoU15** » Thu Jul 31, 2003 2:48 am

Read the manual, tells ya how to do it perfectly!

Zarxrax · Post by **Zarxrax** » Thu Jul 31, 2003 10:39 am

I'm curious about how to do this as well. I think it might not be possible in premiere though.

turboneko · Post by **turboneko** » Thu Jul 31, 2003 10:49 am

Well, if for "smoothly" you intend a matrix type of rallenty (just to say one) then you are probably never going to reach that: slowing down clips simply puts duplicate frames and does not interpolate them (that's why for a good rallenty you need to shoot the footage at a very high FPS count).

Back to the question, one way I would do that is:

1) divide your clip into, say 5 pieces
2) leave the first one at 100% speed
3) set the second to 80%
4) the third to 60%, then 40% and so on

As I said, the result will not probably be smooth as you want, but you can try if you like it

NME · Post by **NME** » Thu Jul 31, 2003 11:26 am

Can't you use keyframes, I've never needed to do this so I'm not sure, but keyframes seem like they might be the logical way to do it, if they can that is. If they can't, premiere is teh sux.

TokyoU15 · Post by **TokyoU15** » Thu Jul 31, 2003 6:11 pm

1) divide your clip into, say 5 pieces
2) leave the first one at 100% speed
3) set the second to 80%
4) the third to 60%, then 40% and so on

There's a problem with that, if I can remember correctly from past experiences, the video starts to shake if you slow it down more than 60%

klinky · Post by **klinky** » Thu Jul 31, 2003 6:29 pm

Well...

Ok, as turboneko said, the speed setting in Premiere only duplicates frames to make it appear as though it's slowing down. This will make it start too look choppy if you slow it down too much.

You'll probably get good results if the full 24fps were used for motion. But in anime maybe only 6,8 or 12fps are "animated" and they're already doubling/trippling or quading the frames. This is going to make it look like ass if you go really slow.

What they most likely did in the matrix is have a hi-speed camera film the scenes then decimated them to 24fps. This looks alot smoother than just taking regular footage and duplicating frames. You can't get this effect unless you make the animation yourself.

~klinky

SephirothJenova · Post by **SephirothJenova** » Thu Jul 31, 2003 11:30 pm

TokyoU15 wrote:
1) divide your clip into, say 5 pieces
2) leave the first one at 100% speed
3) set the second to 80%
4) the third to 60%, then 40% and so on
There's a problem with that, if I can remember correctly from past experiences, the video starts to shake if you slow it down more than 60%

When you get that low, you have to deinterlace the video. Something I picked up when learning on one of my videos. It should make the video look normal, just slower.

Sephiroth

klinky · Post by **klinky** » Thu Jul 31, 2003 11:59 pm

Deinterlacing should have no impact on how it looks. If any thing it'll make it look muddy/shimmery, which is what Premiere's deinterlace does.

Also if you're editing @ 23.976(24fps) you should do ZERO deinterlacing, it will just make it look worse. Unless you have large amounts of visible field artifacts causing ugly lines. Which shouldn't happen if you IVTC'd correctly.

But of course if it looks fine to you, then go for it :p. But deinterlacing is not going to help much.

Ashyukun · Post by **Ashyukun** » Fri Aug 01, 2003 8:27 am

You're right Klinky, they use rather high speed cameras for The Matrix shots like this (at least from what I remember from the extras on the original movie's DVD).

As for doing this in Premiere- I don't think you can really slow it down smoothly (read: without having jumps directly from 100%->80%->60%, etc.). Unless it's something I've just completely missed (also note I'm not referring to Prem. Pro... I have no clue as to whether it can do this or not- and I likely won't for quite some time since it's XP-only), about the only thing that can be keyframed in Premiere is the motion settings. Speed is just a set value. You can most definitely do this in AfterEffects- I believe it's the Time Remapping function that allows you to slow down gradually. But, as has been pointed out- it's going to get jerky when you get down fairly slow because it's going to be duplicating frames...