Super Speed Motion

Videojohn wrote on 10/30/2004, 2:27 AM

I want to increase a lot the velocity of a piece of video of about 45 minutes (It is a fixed frame of a concert hall getting more and more crowded)
I want to increase the velocity so that the hall get crowded in 30 seconds instead of 45 minutes!!! How can I get this very very fast motion effect?
I tried with the video envelop velocity but it does not have amplitude enough to ealize that effect.
Is there any other way to do that with Vegas 5?

Thank you

VideoJohn

Comments

Grazie wrote on 10/30/2004, 2:36 AM

Render>reimport>bang up theVel again> render>reimport .. got it?

G

Videojohn wrote on 10/30/2004, 3:07 AM

Ok I thought about that, but does that process not affect the quality picture?

Chienworks wrote on 10/30/2004, 4:25 AM

You can achieve 12X by using the velocity envelope for 3X and Ctrl-dragging the right edge of the clip to the left for another 4X increase.

If you're working with DV material and rendering to DV files, there will be no quality loss if you disable resampling. Not only does this make the render go much faster, but in effect Vegas will simply grab every 12th (or whatever speed you choose) frame and copy them unaltered into a new file. You can repeat this for as many generations as you wish and still have the original quality unaffected.

The disadvantage of disabling resampling is that if you speed the clip up too much it may end up looking very choppy and unnatural. The fluidity of the motion can be lost. This can be retained by resampling, but then renders will take longer and there will be a very very slight quality loss with each generation. The quality loss is so minimal that you probably won't notice it even after 100 generations or more.

I've used both methods to speed up various clips by a factor of over 500 and the results are excellent.

apit34356 wrote on 10/30/2004, 6:40 AM

500? Chienworks, are you saying 500x or 500%?

jetdv wrote on 10/30/2004, 6:42 AM

You might also want to look at the Time Bandit tool in the Veggie Toolkit. It will slice your clip to achieve speeds faster than 12x in one step.

Chienworks wrote on 10/30/2004, 7:54 AM

500X. One example i posted specifically was 552X, which is a speed increase of 55,100%. Not that this is any kind of limit though. 12X x 12X = 144X, 144X x 12X = 1728X. So in only three steps you're over way 1000X already.