What version of LR (6.6.1, CC 2015.6.1?), OS version, and number of image files in slideshow?
Can you Export to 1080p video using just two image files?
Try closing all applications, restart your system, open only LR, and try again.
Thank you for your answer.
Hereafter the requested details : 2015.6.1Adobe Photoshop Lightroom CC.
I have run the advised test : export video with just two images, after having restarted my Mac System (OS X El Capitan version 10.11.5). It works.
My Diaporama is having 193 photos. As already mentioned, it works fine in 720p. It does not work in 1080p.
Thank you in advance for your help.
Please see this post concerning a 1080p slideshow issue when using vertical orientation image files.
Try removing all vertical (portrait) orientation image files from the slideshow and see if 1080p video slideshow export works.
It was working well before your last update of Lightroom. Removing vertical picture to allow software to work is it only what the programmer team of lightroom is capable of??
This has been reported and Adobe has acknowledges the issue. Hopefully this will be fixed in the next update.
The only solution for now is to rollback to LR 6.6 or CC 2015.6 as outlined here:
Hi; i have the same issue here for all format;
Please do something (maybe my vertical pictures) but it was working with LR5 and when i upgraded to CC2015, it was not working ...
when will it be fixed ?