Thanks that's what I've been trying but I have yet to succeed.

In the Track motion and Pan&Crop it is important that you place the image in the center. After that you rotate the whole thing and it will rotate around itself. If you have placed the image at the side and then rotate it will turn out flying off.

Thanks, I'll have a go at that but I do actually want my object rolling along near the bottom of the screen rather than in the middle.

In the Pan&Crop: place the image in the center and create the rotation by keyframing. In the Track motion: drag the whole ting down to your preferred location at the bottom.

Not the image must place in the center, but the center point of the image must not have an offset
If you leave the point in center, you can place the image/rotation range wherever you want

Right, that's what I mean. 👍

I'd do it in a proper animation program like Flash and export to AVI or MP4 to have better control of the animation

I think we need more info.  This is pretty simple to do in Vegas (and yes, it is a proper animation, motion graphics program).  As long as you keep the Y axis position the same and adjust the X axis position in between your key frames, the pumpkin should roll horizontally (and not fly off at an angle).  Then just time the angle of rotation to match how fast it is going so it looks like it is rolling.  Hope that helps!

Make the rotations in pan/crop and then use track motion for movement.

http://www.lineargroup.com/grfx/tumbling.zip

To many Keyframes, the 2. and 3. are not necessary

I have my own reason for those.

My bad, I didn't see your veg.

I have my own reason for those.

Which would be?
For a smooth movement, a few keyframes are better.
If one Keyframe is wrong, the motion would be fast nonlinear

My bad, I didn't see your veg.

???

You could always try what we did in the old days. Roll a pumkin along and film it. That was in the era of the Model T though.

On a more serious note, switch off auto keyframing (very important!), lock the dimensions of the pumkin. Then make sure it rotates around its center. Use one rotational keyframe for every 360 degrees (for smooth rotations). Then drag your pumkin to the place you want it to start rolling from and move it off screen (zoom out to see beyond the visible screen). Place a keyframe at this point and move the pumkin off the screen at the end point and place another keyframe. That should be it. The least keyframes the better for smooth movement. (Although you can change the nature of the keyframes to achieve continuous movement with trickier trajectories.)

I've done this countless times with animations of cubes and other objects. It gets really fun when you want the object to appear as if it starts in the distance and flys in close all around the screen. The sky's the limit when keyframing composites in Vegas. It's very flexible. My advice is to get the manual out and follow tuts on Youtube to really get your head around this. I needed to keep referring back to this information as I practiced it before I mastered it.

Thanks you for all the replies. Apologies for not rresponding sooner but I've been offline while finishing the project. I have an issue with Vegas Bluescreening my computer when I'm connected to the internet and the last time it did so my Veg was corrupted and I lost a day's work. I did see a couple of the early coments before pulling the plug and figured it out based on what Martin wrote. I am interested to look at the zip file.

For the future, Save and Save-as, have multiple backup VEG files

roll the pumpkin in pan and crop window and move it left to right in the track motion window