Lightroom Classic: Slideshow Export Hangs

I'm a big slideshow export user, and this problem only started happening recently after a few months away from the work.  Looks like I've got the same problem everyone here is reporting.  Now I have the added experience of having adobe support "fix" it, only to have wasted 2 hours, wiped my preferences, got a new install of lightroom, messed with my monitor settings, and treated me like I didn't know a thing about what I'm doing.  Terrible customer care on this.  

Adobe - I expect my subscription fee refund until you have fixed this.  

This is still a bug in November 2019! WHAT IS GOING ON? FIX IT

We will look into this issue and try to reproduce it internally.

Lightroom customer service was on the case for me and identified that my graphics card drivers didn't get a key update automatically, and my windows update had been paused because of an update that failed. Once I updated the graphics card drivers that solved the hang up.

This reply was created from a merged topic originally titled Export Slideshow as Video in Lightroom Classic 8.4.1 on macOS Mojave hangs foreve....

Creating a slideshow in Lightroom never works. It hangs forever while displaying "Export Slideshow as Video" in the top left corner. Many users have reported this problem for YEARS:

https://feedback.photoshop.com/photoshop_family/topics/lightroom-classic-slideshow-export-hangs?topic-reply-list%5Bsettings%5D%5Bfilter_by%5D=all&topic-reply-list%5Bsettings%5D%5Bpage%5D=1#reply_20308659

Just experienced this a couple of times using version 9 (on Mojave). The symptom or clue was that after a long period of time the *.tmp file was not being created and the progress bar had only made it up to about the letter "r" in the English version under the Export Slideshow as Video label.

Used it solidly for a day and it was progressing as expected. Then after adding some more images (HEIC and some jpegs) it started to hang. Quit and Restarted 3 times and then it finally started working again.

The status information needs to be improved so it is clear what is going on. If there is a pre-roll processing step that makes up the time, then then drilling into the status should say that. Then it should really say processing image number XX of YY. Add some more feedback and quote how much has been written to disk. Be even more helpful and start to estimate the time that this will complete. Currently it just says exporting. If there really is an issue making it to the point of writing to disk - report that there is an error.

I suspect there is some engineering opportunity to speed this process up with some parallelisation. I don't see a lot of cores lighting up when slide show is being rendered.

I feel your pain!!! My hunch on processing is the prep step is the first 1/5th of the render progress bar, and its working one core, but I’ve noticed that once it actually starts writing to disk, all the cores light up and max out and the graphics card fans run high.


My only solve was getting the graphics card software update, but I wouldn’t be surprised if other issues might hang up the process. Love the idea of getting better status info and error messages when something goes wrong.

This is still a problem. Just saw elsewhere that LR Slideshow doesn't like portrait oriented images. I took them into PS and created landscape canvases for them and...bam, exports. 

As mentioned in my previous replies here:

1) It appears a previous bug when using Portrait and Landscape images with Option> Zoom to Fill Frame checked is back (or was never fixed). Try unchecking that option and then restarting LR.

2) In the Library module select all of the image files to be used in the Slideshow. Go to menu Library> Previews> and select 'Build 1:1 Previews.' This fixed the issue with landscape and portrait images using 'Zoom to Fill Frame' checked so it may also fix your issue.

3) Update your graphics driver by going to the manufacturer's site and downloading the latest drivers for your GPU.

BTW I'm having no Slideshow issues using LR 9.2 on my Windows 10 version 1903 system. That includes mixed landscape and portrait images, 'Zoom to Fill Frame' checked and 1080p video output.

I had the slideshow bug come back to me last week.  The only fix was to do a FRESH install of my graphics drivers.