Jon - it has been awhile but I think I did it with QT Pro which allows you to capture video streams.
QT Pro cannot save save real streamed media so I would assume it was either a standard "quick start" movie or it was a "screen captured" stream which is now a standard movie file. In either case, it would not be a QTVR.
On the other hand, if the original file was a real download QTVR movie, there is the possibility that someone may have changed the controller type and re-saved the movie somehow. (This may be what the other responder was referring to earlier.) To determine just what kind of a movie you have, open the "Show Movie Properties" window. You should file five lines -- the "main" track (top line with no "enable" box), QT VR Track (should be "enabled"), a VR Panorama Track (also enabled), a Video Track 1 (disabled), and a Video Track 2 (also disabled). If any of the four tracks are incorrectly enabled/disabled, then correct them. (E.g., if Video Track 2 is enabled, it appears the display is a split still with controls deactivated.) If all is well at this point, highlight the "main" track and select the "Presentation" tab in the lower portion of the window. If the "Movie Controller" or "None Movie Controller" is selected in the Controller Type pop-up, then select "QTVR Movie Controller" and see if QTVR functionality is restored. (Not sure what the differences are between the QTVR 1.0 Panorama, QTVR Movie, and QTVR 1.0 Object controllers, but since QTVR Movie was my original type, I use it.)
In any case, you can check this out and see if it helps things at all.
