Key frame the position properties.
It just is not possible to really mimic a dolly shot, because that would require the foreground and background to be separated (like chroma keys) and change the camera direction independently.
The closest you may get is in AE/Boris or maybe with motion.
As Harm points out, the killer is the horizontal speed of the foreground compared to the background, the difference in which gives the impression of a track. you won't get that with a flat piece of video.
The only solution that I can think of is to key in some foreground action and move that at a different rate to the background piece. I doubt if it will be particularly believable though.
Very hard to dolly without a dolly, which is why that shot has so much "production value".
Thanks, all for your commentrs.
Would this be more "possible" in After Effects?
Yes, as long as you don't mind the learning curve, and are ready to accept that the final shot might not actually look like a genuine dolly, but maybe that's the effect you're after, I don't know. Think along the lines of a music clip where the subject is singing and walking through a computer generated landscape and only the subject is real. In this case the subject is usually shot on a green treadmill and the foreground/background motion added in post.
Have a look at Greenday's "Boulevard of Broken Dreams" clip to see what I mean.
Are you saying you want to PAN & SCAN ??
taking a widescreen image and using it inside a standard 4:3 frame and then just keying left and right ??
Its in no way a true dolly but it OK
Is this what you want to do ?
What version Premiere you using ?
That's my impression too, Power by Design, that the poster wants to do a position change (maybe scale with it so there's room to move)...but the terminology "track and dolly" was only way to express it....
Since I am not looking for a realistic effect, I think a low tech solution in my case will be the following (Using CS4)
Since I have "excess video" on the right and left of my subject, I will simply put colored mats on the layers over the right and left of the video track and then just move the video from behind those two matts.
Note that in my particiular need, I have already resize the video so that it does not fit the entire frame (it's kind of a video within a video).
I"ll let the discuss continue for a day or so and then I will mark it closed or solved.
Unless you want to put text or graphics over the mattes why dont you make a new sequence with the 4:3 settings that way you dont have to cover anything.
Then you just pan left and right with your keyframes.
No use having a 16:9 widescreen if its just going to be covered up.