I suggest rolling back to LR 6.4/CC 2015.4. Follow the instructions at this link Lightroom roll back to prior update version, but change step 3 as follows:
If this fixes the issue please report under Conversations> 'Problems' here: https://feedback.photoshop.com/photoshop_family
Please also reply back here with the link to your report to help others.
Thanks for your answer, but I found a better solution that does not involve a down-grade.
Basically, if your identity plate image is too large, then 1080p slideshow video files will not export. Don't ask me why. By changing my identity plate image to a 200x100 pixel image, the video export started to work again.
So, looks like there is an issue with identity plate image sizes and slideshow video exports.
What size was your identity plate, before, when things didn’t work? Was it still happening with LR 6.5.1?
It was either 500x250 or 1000x500, forget which. However, this turned out NOT to be the solution. See more in my next response.
So changing the identity plate did NOT fix the issue. Instead, the identity plate change just allowed the video render to progress further, but then Lightroom would hard crash. I then tried disabling the identity plate and intro/exit screens. That didn't work either. Then tried rebooting and creating the same slideshow (105 images, 1 song, 4 minutes) with no identity plate or intro/exit screens. After the reboot, the symptoms are back to where I started - the render process begins, but hangs at 1%.
Looks like I will have to down-grade to 2015.4 as someone suggested. What a pile of crap Lightroom has become. I spend more of my time doing workaround to make things work better than working with features that actually work correctly.
I can't duplicate your issue with LR CC 2015.4 on my Windows 7 system. Are you using a text or graphical identity plate and if so what is the file type and resolution for the graphic? Have you tried updating to 6.5.1 or CC 2015.5.1. Perhaps the .5.1 update fixed this bug introduced in the .5 update?
Does it work with 2 photos and the same song? Does it work with 2 photos and no music? Just to see what is causing things to choke.
Sometimes a particular photo can cause issues and removing that photo will make it work, again. I suppose the same might happen with the music.
Try rebuilding standing and 1:1 previews for all the photos involved.
If you can find a small set of images that music that doesn't work then those could be uploaded somewhere and people can try on their own computers, to see if it's something about the media that is the issue or something just on your computer.
Im on a MacPro running 10.11.3 (El Capitan). The identity plate is a JPG. Resolution is not set in the file, so it must just be 72. The overall size is only 200x100. However, the more i work with this, the less I think it has anything to do with the identity plate.
I just upgraded to 2015.5.1 and the issue remains.
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I tried it with 14 photos and the same song - still doesn't work.
I tried it with 14 photos and no song - still doesn't work.
I rebuilt standard, 1:1 and smart previews - still doesn't work.
I tried it with older photos from a different event - still doesn't work.
It appears that as long as I choose 1080p and High quality, it fails. Or at least I haven't found the right combination of media to make it work. Not that I should have to find the right media. It should just work.
As a side note, this functionality is fundamentally important to what I do. I am a wedding & portrait photographer. After the event, I do a meeting with the clients to review the photos, and that includes a slideshow. It is critically important to my work that this functions properly.
Next try for me is to down-grade to 2015.4.
Does it work with 2 photos (not 14)?
2 images without music worked.
As did 2 images with music. I tried it with music also to force the length to be longer, but it still worked.
I have not clue why.
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Some more testing (all done 1080p, high quality, intro/exit identity plate) -
2 photos no music (all horizontal, RAW) - worked
2 photos plus music (all horizontal, RAW) - worked
4 photos plus music (all horizontal, RAW) - worked
5 photos plus music (all horizontal, RAW) - worked
6 photos plus music (horizontal plus 1 vertical at end, RAW) - FAILED
6 photos plus music (all horizontal, RAW) - worked
9 photos plus music (all horizontal, RAW) - worked
10 photos plus music (horizontal plus a different vertical at end, RAW) - FAILED
10 photos plus music (all horizontal, RAW) - worked
2 photos plus music (all vertical, RAW) - FAILED
The conclusion that I am now coming to is that vertical photos are causing the problem. At least my limited testing would seem to indicate as much. Note that the Preview and Play functions work just fine, but not Export Video.
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Good job figuring out the issue is correlated with vertical images. I can confirm the same thing happens (Export as 1080 mp4 locks up at the beginning) to me on Windows 7. Starting with 3 JPGs from my Galaxy S6 phone, two horizontal and one vertical: a slideshow with 2 horizontal images or one that isn't 1080 works, but a slideshow including a vertical image and 1080 locks up at the beginning. Furthermore, if I cancel the locked up slideshow and try to do an Export Slideshow to the same filename it says the file is in use, so the export is invisibly crashing and keeping the file open. The filename becomes available, again, if I restart LR.
I'll submit a bug.
In trying to find images for submitting the bug, I'm not seeing the issue happen most of the time a vertical image is included. The first set I tried it seemed to happen every time. The next two or three times it didn't. Even with the two images that originally had the issue, if I select non-vertical image as the most selected image, then I can export 1080 video using the same two images that fail if the last image, the vertical one, is selected.
I am going to have to try more scenarios so the bug is confirmed with different cameras and the exact configuration that causes the problem consistently.
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I can confirm this issue does NOT occur with LR CC 2015.4 on my Windows 7 system. It looks like the bug was introduced in the 6.5, CC 2015.5 update.
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Interesting, it seems to fail for me every time, but then again I always use the same cameras. In case you need additional data, I've listed my cameras below for reference -
Nikon D4 - RAW, 14-bit AdobeRGB
Nikon D750 - RAW, 14-bit AdobeRGB
Contax 645 film camera - JPG 8-bit produced on either Fuji Frontier or Noritsu film scanners
I'll do some more tinkering too when I have some additional time. However, I am going to down-grade my main editing rig so that I can get some work done. Thanks much and I'll post any additional results if I have them.
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I deleted the catalog-name Previews.lrdata folder for my catalog, removing all previews, and now I am able to export the slideshow with a vertical image at the end. You might try this and see if it works.
I think LR uses previews for slideshows so the first thing it does is scan the previews for the selected images, rebuilding any that are out of date, and apparently there is something wrong with this process, either the previews themselves are bad, or there's a hiccup on the scanning/rebuilding. I am using the same two images every time so their previews have been long since rebuilt. if there is something off it has to be in other previews, somewhere.
I am going to rebuild all the previews in my catalog, some 83,000 images, and then see if things are ok or not.
I had to change the song from MP3 to a MP4 and for some reason it then
Sadly, I have tried deleting the preview files a few different times and that does not work for me. I have numerous issues with the preview files in the past, so that was one of the first things i thought of.
Honestly - this is just a bug and it should be on Adobe's list. Even if it is a preview issue, that's still a bug.
Did you ever get this resolved? We have the same issue.
I had this problem today with LR 2015.7.
Finally fixed by turning off the GPU Acceleration and SmartPreview editing in the Lightroom Preferences.
That worked for me on latest Lightroom CC, but only once. All attempts to do a second subsequent export at 1080p have failed. 720 works fine every time. It seems like high resolution slideshow exports is a long running issue that has never really been fixed as yet, which is really disappointing.
This is still an issue with the latest 6.8 and CC 2015.8 versions when using Landscape images in the slideshow: Lightroom: Will not export both portrait and landscape oriented pictures as a slideshow video in 720 or 1080 | Photoshop…
I was able to work around the issue by:
1. exporting the slide show collection to a bunch of 1080 sized JPGs.
2. Then re-importing to Lightroom those 1080 sized Jpgs.
3. making a copy of the original slideshow in Lightroom so I don't have to redo the settings but still keep the original raw based one in case the bug is ever fixed..
4. next delete the raw pictures from the copied slideshow.
5. add the re-imported 1080 Jpgs to the now empty copy of the slideshow.
6. Export to video as before. it now works, you should see progress obnthe export within about 60 seconds where it just stalled before
I remember trying 1080line video for Xmas 2015 and it did not work. I can not remember what CC version I was on then, for sure it was the latest. During that time, there was also a bug with the video cache which made videos on slow Windows systems non playable. So I felt it was all a mess and I was happy that 720 line slideshows for a combination of slides and video worked. Still, this a very non-proffesional mess that Adobe piles up here. And I remember also an issue with QuickTime.... I will go for 720 lines for this xmas and tell friends and family that that is the best my paid technology can do without me spending xmas adjusting some plates' resolution that I never heard about before.
I was having the same problem identified here. That's what started me researching. Nothing seemed to work. Even deleting and re-creating previews. I then decided since it's a new year, that I would start a new catalog for 2017. I imported the files I wanted for my slideshow and was able to export it as a 1080 P video. I'm thinking my catalog was too large. Anybody have any thoughts on this?
I go tired of Adobe not fixing it. We are now using a 3rd party software for the slideshows. And we can do 4K slideshows.
None of these are problems if you use LR5. I upgraded to LR6; don't see any benefits and the slideshow has become dysfunctional. I am not going to solve the issue as I have in the past, and as you all have seen, Adobe ignores both the problem and your work to solve it. Going back to LR5, third party software for slideshows coming next and still exploring alternatives to LR despite the fact that I can make magic with it... but LR/adobe pisses you off all the time.
What are you using? and Mac or PC?
Every time I take a set of photos I create a folder for them. typically I have to convert them to DNG for LR so there is a folder inside the one holding the RAW files. Then I open LR and create a new catalog for these specific photos. Then I save the catalog in that folder. In this way the actual photo files and the catalog stay together no mater where I move the folders. ...And I do move the folders around. This is foolproof (and I need more of that. lol)