I recommend contacting our techsuport here since it requires some testing: http://smartshow-software.com/support.php
They will help you.

what is the FPS of the preview window? the reason why are ask the video, audio everything works perfectly fine, when I export to Video the audio is slightly out of sync..

I'm using mp3 through out..i have tried changing the coding from AAC to MP3 still the same??

any ideas?

I have checked the FPS of the video's in my slideshow I'm are @30fps except for one which is @25fps but out of sync happens way before the 25fps starts so it isn't that..

I have tried several settings video to internet and HD video for the TV...still the same...