Use Indesign to Flash Flip Book to change background image of flipbook.

Yes, when you use our flipbook software, you can change the background image of flipbook.
Below are steps in detail:

Step1: Run your A-PDF to Flipbook software, and then import PDF from Local PC for conversion;

Step2: Chose template from template box (Classical as Example)

Step3: Find Background Bar on Design Setting panel (Design Setting -> Flash Display Settings -> Background Config -> Background);

Step4: Click "…"button in background file to browser image file from your computer, and then define image position;

Step5: click “Apply Change” to refresh the design settings, you will find your flipbook’s background image has been changed.