This is most likely just down to an aspect ratio problem.
For example if your working image is square and you want to export as HD which is widescreen then you will end up getting blank areas on either side of the square image.
There are ways to work around this. When you are exporting you can select Target Resolution - Crop and then frame the red box around your character to get the best fit. This will however crop out the top and bottom of your image as shown below.
It is always best to try and plan ahead if possible. If you know you want to export as a widescreen video then try to start your project with an image that is widescreen to start with. You can do this in any image editor, and if you also remove the background, you will not have to do this once in CrazyTalk.
Peter
Forum Administrator
www.reallusion.com