1 person found this helpful
Please let us know the Lightroom and operating system version you are using now? also, are getting any error message while doing the export.
IMAC 27 inch 3,06 GHZ intel core duo. 4GB 1067 MHz ddr3
Video ATI Radeon HD 4670 256 MB
Lightroom-versie: CC 2015.10 [ 1111918 ]
Licentie: Creative Cloud
Besturingssysteem: Mac OS 10
Versie: 10.11 
Aantal logische processors: 2
Processorsnelheid: 3,0 GHz
Ingebouwd geheugen: 4.096,0 MB
Beschikbaar fysiek geheugen voor Lightroom: 4.096,0 MB
Fysiek geheugen gebruikt door Lightroom: 307,7 MB (7,5%)
Virtueel geheugen gebruikt door Lightroom: 4.479,6 MB
Cachegeheugengrootte: 851,0MB / 852,2MB (99,9%)
Maximumaantal door Camera Raw gebruikte threads: 2
Camera Raw SIMD-optimalisatie: SSE2
Virtueel geheugen Camera Raw: 0MB / 2047MB (0%)
Schermen: 1) 2560x1440
ATI Radeon HD 4670 OpenGL Engine
Check OpenGL support: Passed
Vendor: ATI Technologies Inc.
Version: 3.3 ATI-10.0.52
Renderer: ATI Radeon HD 4670 OpenGL Engine
Toepassingsmap: /Applications/Adobe Lightroom
Bibliotheekpad: /Users/ton/Pictures/Lightroom/Lightroom Catalog.lrcat
Map Instellingen: /Users/ton/Library/Application Support/Adobe/Lightroom
3) Canon-plug-in voor tethering
This is my configuratie.
Hi, thanks for your speedy reply. I'm now running Lightroom 2015.10.1 and Camera Raw 9.10.1 which I believe are the latest updates. My MacPro is running OS 10.12.5. As I recall, when this was happening with a previous version of Lightroom I was told that the problem occurred when the slide show included both horizontal and vertical images. Has that problem returned or is it a new problem? The work depends on being able to export high res video slide shows. Please advise asap. Thanks.
Hi Mohit, Any help for me yet re exporting videos?
What is it that you found in that thread that you think will solve my problem. Is there a solution hidden in all that information?
Hi Mohit. I've reinstalled Lightroom and I am still not able to export any videos except at the lowest resolution. The videos contain both vertical and horizontal images. The preview and "play" work fine. When I try a 720p export the progress bar does not move at all no matter how long I wait. This is the same problem I had with a previous version of Lightroom and was told that it was a known issue. Is that the case with the latest version as well? Is there a new version on the way that will fix the problem? Is there something else that I need to do? This feature is ESSENTIAL to my work. Please respond to this email. Thanks.