Slow Motion Question

[Edward Troxel]

The velocity envelope can definitely slow it down (in fact, set to 0% it can stop it and negative %’s will go in reverse). Now, are you wanting to actually see something in particular? Or just that there is still motion? For example, if it’s a record you probably won’t be able to get it to the point where you could read the label.

Edward Troxel

[Story Catcher]

Thanks Ed

It is a piece of equipment that they want filmed, then slowed down in a video file so that they can see what’s going on while it is spinning.

Speaking of velocity envelopes – is there a way other than dragging the bar up and down to set it to a certain % point? I notice as I drag the bar it jumps a bit and sometimes a setting in between would work better.

Thanks
Heidi

[Gary Kleiner]

Right click on the node (little box) that, by default, is on the left extreme of the green line and enter any number you like.

As for how to shoot it…
I assume you are not FILMING this, but video taping.
If it were film, we would be talking about how fast the film moves through the camera.

With video, you will have to experiment with shutter speed. A very high shutter speed (e.g. 10,000th), will give you much clearer individual frames, but there will be more time elapsed between them.
A slower shutter speed will have less change in position between each frame but will have more motion blur.

Gary Kleiner

[Story Catcher]

thank you Gary – yes, it is video. 🙂
Thanks for the advice and tip on altering the velocity %

Cheers
Heidi

[Jerry Waters]

Did you set several nodes to change the rate?

[Terje A. bergesen]

1700 RPM

Herein lies a small (possibly significant) problem. 1700 RPMs divivided by 60 seconds in a minute gives you about 28 rounds pr second. If your camera is an NTSC camera, it will snap almost exactly one frame pr round. In other words, slow it down and it won’t be particularly insightful (if they are looking for something in particular). Just blurry.

I don’t know that much about cameras, but would be surprised if you didn’t need a specialty camera for this.

Feel free to correct me, I’m eager to learn.