How to make a video slow gradually

This forum is for video and audio help and discussion.

How to make a video slow gradually

Postby 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?
User avatar
madbunny
 
Joined: 17 Jun 2003

Postby TokyoU15 » Thu Jul 31, 2003 2:48 am

Read the manual, tells ya how to do it perfectly! :wink:
<a href="http://www.senpaiproductions.net">Image</a>
<a href="http://www.animemusicvideos.org/members/members_myprofile.php?user_id=326">View My Profile</a>
The Thrill of The Kill Is Alive and Well!
User avatar
TokyoU15
 
Joined: 05 Feb 2001

Postby 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.
User avatar
Zarxrax
 
Joined: 01 Apr 2001
Location: Concord, NC

Postby 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 ;)
You should never underestimate the predictability of stupidity.
User avatar
turboneko
 
Joined: 23 Feb 2001
Location: Foxboro, MA

Postby 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.
nil per os
NME
 
Joined: 13 Jul 2001
Location: Far Country
Status: nauseating bliss

Postby 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%
<a href="http://www.senpaiproductions.net">Image</a>
<a href="http://www.animemusicvideos.org/members/members_myprofile.php?user_id=326">View My Profile</a>
The Thrill of The Kill Is Alive and Well!
User avatar
TokyoU15
 
Joined: 05 Feb 2001

Postby 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
User avatar
klinky
 
Joined: 23 Jul 2001
Location: Cookie College...

Postby 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
<a href="http://www.animemusicvideos.org/members/members_myprofile.php?user_id=4456">Profile</a> <a href="http://www.rockmanvortex.com/sephiroth" target="newwindow2">Existentialism Studios</a> <a href="http://www.animemusicvideos.org/members/members_videoinfo.php?v=53160"><b>Elysium</b></a>
User avatar
SephirothJenova
 
Joined: 05 Jun 2001
Location: St. Louis, MO, USA

Postby 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.
User avatar
klinky
 
Joined: 23 Jul 2001
Location: Cookie College...

Postby 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...
Bob 'Ash' Babcock
Electric Leech Productions
User avatar
Ashyukun
Medicinal Leech
 
Joined: 04 Sep 2002
Location: KY

Postby Zarxrax » Fri Aug 01, 2003 11:46 am

So THATS what the time remapping is for. Silly me for never bothering to try and figure it out.
User avatar
Zarxrax
 
Joined: 01 Apr 2001
Location: Concord, NC

Postby Ashyukun » Fri Aug 01, 2003 12:16 pm

Yeah. But unfortunately it's rather tricky to deal with, and even the AE Bible just skims over how to use it. I've only fiddled with it but abandoned it because it wouldn't do what I needed (slow down audio and maintain pitch). It would be really smart of Adobe to have put in into PremPro, because it makes much more sense to have it there than in AE only...
Bob 'Ash' Babcock
Electric Leech Productions
User avatar
Ashyukun
Medicinal Leech
 
Joined: 04 Sep 2002
Location: KY

Postby zalas » Tue Aug 05, 2003 12:36 pm

Time remapping IMO works just like any other keyframable effect. You'd adjust the 'velocity' part of the value instead of the actual value. And if you don't mind ghosting, you can try using that function in AE to interpolate frames (darn it, I keep forgetting the name >_<)
zalas
 
Joined: 20 Dec 2001


Return to Video & Audio Help

Who is online

Users browsing this forum: No registered users and 0 guests