Thanks for that.

What's a good setting for smoothness? What does it depend upon?

What are the effects of the other papameters in what circumstances?

I had the same question when putting together my first "Ken Burns" type video. After some experimenting I decided to use the "smooth" option for all keyframes. The reason is that when the viewer sees the result in a sequence involving several keyframes it appears as if the camera is being moved while the subject remains still. The default interpolation method appears very jerky at each keyframe start/end point - it's as if the camera is being moved by a mechanical robot and this results in a very artificial looking video.

I found "smooth" to be the most human-like transition. Note that in Vegas MS it is impossible to change the default interpolation method - you have to set each keyframe to "smooth" by yourself. The easiest way to do this is to first set all your keframes in place, then select all of them together (click first one, shift-click last one) and then right-click any one to set "smooth; this sets all of them in one operation.

Have a look at this thread where the topic was discussed some time ago.

Basically, the keyframe settings determine the shape of the path the "camera" moves along (spatial smoothness), and the smoothness setting determines the speed at which it moves along the path (temporal smoothness).

Mark

A simple way to select all of the keyframes is by dragging the selection box across all of the keyframes you want to select. Start your mouse drag in the crosshatched area to the right of the keyframes and drag while moving left. Even easier than shift clicking each one to add it to the current selection, especially if you have a lot of keyframes.