Hi,
The problems you are having with cropping and white areas in the outputted video are all aspect ratio related. The best way around these problems is to start your project with an image in the correct aspect ratio. So for example if you want to output a 4 x 3 format video make sure you start with a 4 x 3 image. You can do this easily in an image editor if your photo isn't the right size.
Likewise if you want to output in Widescreen HD then start with an image in that format or be prepared to crop it to that format when you are ready to output.
With regards to the chroma keying request, you can add your own background already in Crazytalk. By using Background Mask Editing you can easily add any background image of your choice behind your model. Please see HERE for details.
Thanks for the feedback.
Peter
Forum Administrator
www.reallusion.com