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/t5/lightroom-classic-discussions/p-export-slideshows-as-videos-fails-to-complete/m-p/15349929#M417593May 31, 2025
May 31, 2025
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Description of Issue
After preparing a slideshow in Lightroom with audio, I can successfully preview/play the entire slideshow. When I ask it to export the Slideshow as a video (MP4) it starts the process but then seems to hang without generating an error message. I have tried different video resolutions and removing the audio files but the result is the same. I have left the export process for hours and even overnight, however, the progress bar is always at the same point as I left it.
This export was working in second quarter of 2024 however noticed this behaviour after using this feature following the December 2024 update.
Step-by-step Reproduction Instructions (in precise terms please)
Import images and/or videos into Lightroom
Sort and post-process the photos
Select the photos and/or videos to be used in the Slideshow and create a new slideshow
Review and update slideshow settings, adding audio files (slide length, crossfades, Audio balance, Pan and zoom, etc)
Preview/Play the slideshow in Draft, Standard and High quality
If plays correctly, export the slideshow to video at 1080p or 720p specifying a filename and folder location (typically on the local Hard Disk Drive but sometimes to a external HDD or USB stick.
The Expected Result
After 15 - 45 minutes the slideshow is exported to a video file which is an MP4 file, depending on the number of images/videoes included in the slideshow.
This feature worked numerous times in April 2024.
The Actual Result
The export process starts and seems to be progressing but then stalls. See attached file for screen capture of progress bar status when stalled. No error message is displayed.
Is anyone else experiencing this issue?
Is there a work-a-round that I can try to successfully complete this task?
Can you provide any information on how others can try to reproduce the issue. For example, no mention of how many photos are in slideshow, the template used, the settings used in the Playback panel, etc.
Is there any way of identifying the API version/build that I am currently using?
"Have you tried exporting the slideshow to video with the music disabled?"
I initially tried removing the music files - no change
After your suggestion I disabled the music with the slider/switch - no change
"Are you combining still photos and videos into a single slideshow?"
Yes.
I have two main slideshows that I am tried to export atm. the one I am using for testing has 6 x videos and 195 x still photos. The slideshow duration is 19m 31s
"Have you tried resetting the LrC preferences?"
I had not but folloing your suggestion, I followed your suggestion and used Method 1 in the link provided to reset the preferences - no change
"Can you provide any information on how others can try to reproduce the issue. For example, no mention of how many photos are in the slideshow, the template used, the settings used in the playback panel, etc."
As stated above, the first slideshow I am trying to export has 6 x videos, 195 x still photos and a duration of 19m 31s
I have another version of the first slideshow which was trimmed to a duration of 14m 46s
The second slideshow is longer with a duration of 55m 01s
Previously, I had successfully used the same methodology to export slideshows of similar durations
No specific template used, just selected the initial photos in Library, switched to Slideshow and adjusted the options on the panel on the right hand side.
On the 14m 46s slideshow are
Options - Zoom to Fill Frame --> not checked
Cast Shadow --> checked
Opacity 55%
Offset 40 px
Radius 30 px
Angle -45 degrees
Layout - Show Guides --> Checked
Left - 75 px
Right - 75 px
Top - 75 px
Bottom - 125 px
Aspect Preview = Screen
Overlays - Identity Plate --> Checked
Opacity - 100%
Scale - 15%
Render behind image --> Not checked
Watermarking --> Checked
Rating Stars --> Not checked
Text Overlays --> Checked
Backdrop - Color Wash
Opacity - 49%
Angle - 45 degrees
Background image --> Checked
Opacity - 100%
Background Color --> Checked
Titles - Intro Screen --> Checked
Add Identity Plate --> Checked
Override color - Not checked
Scale - 45%
Ending Screen --> Checked
Add Identity Plate --> Checked
Override color --> Checked
Scale - 30%
Music - Five (5) MP3 files added
Playback - Automatic Checked
Sync Slides to Music --> Not checked
Slide Length - 3.9s
Crossfades - 0.6s
Audio balance - slider closer to video just left of the heading 'Audio Balance' above it
Pan and Zoom --> Checked
Slider - very low, aligned between the n and d in the 'Pan and Zoom' heading above it
Repeat Slideshow --> Not checked
Random Order --> Not checked
Quality - High but have tried Draft and Standard too.
Text Overlays
Top centre - replaceable text from photo metadata - <Title>
Bottom left - replaceable text from photo metadata - <Caption>
Bottom Centre - Fixed text - Name and year of slideshow
Does this provide sufficient information for others to try to reproduce the issue?
I am having the same issue. I have tried all the published workarounds, including uninstalling and reinstalling, resetting cache, disabling graphics processor, and exporting JPEGs only to a new Cat.???
MacBook Pro M3 Max, Sequoia 15.5, LRC 14.3.1, 342 GB available of 1TB.
I am having very similar issues with a similar setup (MacBook Pro with current versions of all software). Shorter tests work fine but bigger slideshows cause LR to choke and hang. Also making the Finder have issues where I'm getting beachballs.
Just updated to Lightroom Classic v 15.0 and the updates mentioned upgrading the enhanced capability to export Slideshows in 4K. Optimistically I tried exporting my slideshow, but alas, the same result - a hung process which fails to complete after more than 12 hours. Very disappointed.
Still waiting for a solution to the problem introduced by a software upgrade 12 months ago.
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