Slow motion tip

TorS wrote on 6/27/2003, 6:44 AM
When you want a freeze frame that goes into motion, the change can be a bit abrupt (going from 0 to 100% in one frame). Here's a tip to make it more smooth:
1 Split the event a little into what goes on after the freeze.
2 Move the right hand event a little to the right.
3 Ctrl-drag the right edge of the left event (left side of the split) up to the event you just split it from.
You will then have motion that goes from 0 (freeze) to something - perhaps 50% - for a little while and then to 100%. Smooth.

You could accomplish this with the velocity envelope, but I for one have a hard time finding out how much I must pull which part of the event to which side. So I don't use VE for freeze frame.
Tor

Comments

jetdv wrote on 6/27/2003, 9:09 AM
But the whole point of the Velocity Envelope is to gradually change speeds. By cutting and CTRL-Dragging, you will have sudden changes in speed where the Velocity Envelope will gradually change speeds. I'd pick the Velocity Envelope any day for this kind of speed change. For a constant speed change, (i.e. the whole clip is 50%) - I'll use CTRL-Drag.
FuTz wrote on 6/27/2003, 9:24 AM
And don't forget to choose the "fade type" you want to polish it up!
(right-click on curve then choose type of fade) ;D
TorS wrote on 6/27/2003, 9:27 AM
I know, but you get sudden changes in smaller steps, and that makes it more smooth.
Do you know a sweet way to use velocity envelopes in the example I gave?
Tor
jetdv wrote on 6/27/2003, 9:56 AM
Yes. Don't do it in ONE FRAME - do it over many frames. Have two nodes on the timeline: The first one at 0% and the second one at 100%. These two nodes can be placed as far apart as you want. Say you have a freeze frame (0%) node at the 5 second mark and a full speeed (100%) node at the 8 second mark - the clip will slowly speed up, over a period of 3 seconds, to full speed.
TorS wrote on 6/27/2003, 10:24 AM
I get a jump when the freeze clip changes to the accelerating clip. But that may well be because the first clip is not set up properly. I want (naturally) the freeze frame to hold for a while. So how do I make sure the freeze frame is exactly the one preceding the first frame og the accelerating clip?
jetdv wrote on 6/27/2003, 10:36 AM
This is all I do. It takes off so slowly You can just barely tell it has started moving again.

Velocity Envelope Veg
doncarp wrote on 6/27/2003, 2:40 PM
I had a series of taped interviews that had to go together. Fading from one to the next didn't seem like a good transition. I moved the cursor on the timeline to the first frame in the clip, then clicked "copy snapshot to clipboard", save the snapshot as a jpg, then inserted the jpg on the timeline for 2 seconds and butted the viceo clip up to it.

It worked well for me.
TorS wrote on 6/27/2003, 2:49 PM
I see what you mean. Very good. I thought I had to split the event. I see it works, but I don't understand how. How that same lenght of timeline can play at such a different amount of time, and end up on its feet is beyond me.
Tor
jetdv wrote on 6/27/2003, 3:31 PM
So you've been splitting the video everywhere the velocity needed changing? That would explain your problems. As you can see, the video speed can be dynamically changed WHILE it is playing (something the other NLE's WISH they could do) from -100% (full revers speed) all the way through 300%!. The VEG file slowly reduces speed to a freeze frame (how I ALWAYS do it, no need for snapshots) and then slowly speeds back up to full speed.
TorS wrote on 6/27/2003, 4:23 PM
The one I was working on when I reached the solution given in the first post was: Freeze the first frame of an event, hold it for a while and let it go (quickly but smoothly) to 100% for the rest of the event's duration. I tried with your method, and it worked. I added velocity envelope, added two points, set the very first point to 0%, the second to 0% and left the third at 100%. And it worked. The first frame freezes, then the motion starts slowly, picking up to full.
That's cool. Thank you JET for telling me. It got even clearer when I added the same event to a track below - without the velocity envelope. They start at exactly the same frame, but as soon as the velocity thing is over they are not in sync any more. So if I am doing this to an event in the middle of something it may no longer end on the frame I had decided it should end. Knowing that, I can make adjustments and come out good after all. Thanks again.
Tor