best way to increase velocity

Jeff Waters wrote on 12/8/2005, 10:32 AM

Hello all,
I would like to massively speed up a clip-- sort of creating a timelapse effect. I tried increasing the playback rate, but that created a herky jerky playback.

Then I used a velocity envelope but was limited to (I think) 300%. So I did that and rendered out to a new clip (avi). Increased the velocity on THAT by 300% and repeated.

I noticed that the quality began to suffer with each new rendering.

What thoughts do you have on best practices for doing this?

Thanks,
Jeff

Comments

winrockpost wrote on 12/8/2005, 10:40 AM

You could capture the clip using scenealyzer (sp) software and set it as a lapse, fully adjustable ,works great, and very inexpensive.

Chienworks wrote on 12/8/2005, 10:41 AM

Since you're using a velocity envelope i'm assuming you don't need the sound. You can increase the playback rate by Ctrl-dragging the right edge of the clip to the left to "squash" it to 25%. This will be a 4x increase. Combine that with the velocity envelope to get 12x. You can then render and recycle as needed.

What format are you rendering to? If your original source is DV .avi then you should be rendering to DV .avi. If your original source is just about anything else, then you should be rendering to uncompressed AVI until the final step. You may see some blurring if you have resampling enabled. Right-mouse-button click on the clip and choose Switches / disable resampling in order to cleap the clearest image possible.

bw wrote on 12/8/2005, 4:21 PM

Can thoroughly recomend Scenaliser. Cheap, good for capture generally, wouldn't be without it.
Brian