Accelerate video

[Donaldini]

I have a video that is shot walking from one place to another. Now I want to make it accelerate in about 1sec to an accelerated movie (at 500% for example) and then somewhere near the end have it slow down again to 100% speed.

I have Premiere Pro, but if necesary I can use any other prog if someone could help me...

[guns1inger]

Don't know how to do it in Premiere Pro, but in Vegas you would use a velocity envelope.

[dipstick]

In Premiere Pro:

Make the cuts in the clip you want to speed up or slow down. You can use "Control + K" to make the cuts in the timeline. Right-Click on the clip and choose "Speed - Duration" and enter 500 % or whatever you want to change it to, like the following example:


speed.png

[daamon]

Make the cuts in the clip you want to speed up or slow down. You can use "Control + K" to make the cuts in the timeline. Right-Click on the clip and choose "Speed - Duration" and enter 500 % or whatever you want to change it to

This will work and achieve one kind of effect - the speed of motion (walking, in this case) would jump from 100% to 500% with no "in between" speeds over a defined period of time. If this is what's wanted, then that's fine. However...

I don't know Vegas, but it sounds like the "Velocity Envelope" achieves a different effect - i.e. start at 100% and accelerate to 500% over X frames or Y seconds. Can this be done in Premiere Pro?

[guns1inger]

velocity envelope allows you to mark where you want the changes to begin and end, and to set the type of change (linear, exponential etc). I would expect Premiere Pro would support some form of keyframing of playback speed.

[daamon]

I would expect Premiere Pro would support some form of keyframing of playback speed.

It certainly does - but I've not seen anything (and, I confess, I've not looked all that hard) that allows the setting of exponential or sinusoidal etc. The default is linear, but this would require a number of keyframes to achieve something close to a non-linear change.

[Donaldini]

In school were on Macs and use Final Cut and I know how to do it over there using keyframes
and the pen-tool, but I can't seem to find it for PC software like Premiere

I'll try to explain again what I want:
let's say from frame 1 to 20 I want to have the video increase speed from 100% to 500%
Frame 20 - 50: speed stays stable at 500%
Frame 50 - 70: slows down again to 100%

[daamon]

I'll try to explain again what I want:
let's say from frame 1 to 20 I want to have the video increase speed from 100% to 500%
Frame 20 - 50: speed stays stable at 500%
Frame 50 - 70: slows down again to 100%

I'm with you - I've had quite an in-depth look into the available effects, as well as a look through the help, and can't see that it's simply done by applying an effect or control.

You may find the answer by posting and / or searching in the forums at www.wrigleyvideo.com/videotutorial - be sure to post back if you have any luck. The tutorials there are good too.

Good luck...