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I have a file 8192 x 1108 (pan Background). It's an animation with a camera move.
Only the xettings were wrong when I animated it. It actually should have been 8192 x 1152. So before cleaning the animation up I wanted to convert the project to these new settings.

Problem : the camera stretches out to the new project proportions, where it should stay on 16:9 filmproportions.

Bug? Is there a workaround?

have you tried to lock the Camera settings before to stretch your project ?
(I haven't tvpa right here, but I think you'll probably just have to offset the camera path)
or alternatively to save them, then to modify the project's size, and re-load the saved Camera settings ?

Thanks Zigotto. This is just the input I needed to make me think a bit further than a frog (no offence to all the frogs in the world). I just needed to change the camera parameters after conversion. (did not know yet this was possible, since I'm still new to TVP)

Thanks! another problem solved.