Lightroom for desktop: Spherical panorama creation hangs

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  • Updated 2 weeks ago
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  • (Edited)
Hello all,

I'm
trying out the new Adobe Photoshop Lightroom, coming from Lightroom 6.
One of the features that is critical for me is the stitching of spherical panoramas. Lightroom 6 is decent, but often creates a visible seam or other smaller mistakes, and I hope that the latest Lightroom is better. Unfortunately, Lightroom CC seems to hang after a while. Creating the preview works fine. When actually rendering the full panorama it uses 100% CPU as expected, but later it reduces to 18% CPU, and a few minutes later it's down to no CPU usage at all. The user interface is still responsive, it's only the merging itself that hangs in limbo.


Has anyone experienced this? Is there a solution? I have unticked "use graphics processor" in the p, but it didn't change anything in the behaviour. The merging process just stops mid-way.

I'm stitching 26 DNG files shot by a DJI Mavic 2 Pro drone. Below you can see where the "Performing Merge" step hangs.





This is my system info:

Lightroom version: 2.3 [ 20190502-0902-47ed471 ] (May  3 2019)Operating system: Windows 10OS Version: 10.0 [17763]Application architecture: x64System architecture: x64Logical processor count: 8Processor speed: 4,0 GHzBuilt-in memory: 32650,5 MBReal memory available to Lightroom: 32650,5 MBReal memory used by Lightroom: 334,5 MB (1,0%)Virtual memory used by Lightroom: 418,2 MBMemory cache size: 189,7 MBInternal Camera Raw version: 11.3 [ 197 ]Maximum thread count used by Camera Raw: 5Camera Raw SIMD optimization: SSE2,AVX,AVX2Camera Raw virtual memory: 22MB / 16325MB (0%)Camera Raw real memory: 22MB / 32650MB (0%)System DPI setting: 120 DPIDesktop composition enabled: YesDisplays: 1) 2560x1440Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: NoGraphics Processor Info: DirectX: NVIDIA GeForce GTX 970 (26.21.14.3086)Application folder: C:\Program Files\Adobe\Adobe Lightroom CCSettings Folder: C:\Users\Sybren\AppData\Roaming\Adobe\Lightroom CC
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Sybren Stüvel

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Posted 2 months ago

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Tomas

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I have suffered the same problem in a iMac . After several chats with Adobe technicians and Apple techs too, following their instructions I uninstalled several times the Adobe software, I formatted my iMac, and even I sent the iMac to Apple in order to install a former version of the IOS . No clear root cause and solution was found .It seemed to be some incompatibility among version of Adobe and windows or Apple operating system.
After several weeks of tryouts without success
What I am doing is try to avoid the use of many pictures ( no more than 6-7) to generate a Pano.
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Kjetil Drarvik, Employee

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Can you list the file names of the 6 that will not merge, just so I'm sure which ones are the 'last 6'?
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Sybren Stüvel

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Good point -- Lightroom didn't have the ordering I expected. It's those: https://stack.stuvel.eu/s/DPqu8PQCyXIOo2S (7-12)
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Kjetil Drarvik, Employee

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We can reproduce the problem as you describe it, and we are looking into how to address it. Thanks!
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Sybren Stüvel

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Can you give any indication of an ETA of the fix?
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Sybren Stüvel

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Can you give any ETA of being able to give an indication of an ETA of the fix?

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Rikk Flohr, Official Rep

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Sybren,

I've had off-forum conversations with Kjetl Drarvik from the Lightroom Desktop team as well as Josh Bury from the Camera Raw team. In our testing, we are not able to verify the issue. On some of our systems (Mac and Windows), the image stitches as expected. On other systems, it appears to hang as if it is failing to stitch but does eventually complete if given enough time. This initially caused Kjetl to believe that he was seeing a failure-but given time the merge completes and completes correctly. 

At this point we are not prepared to designate this as a bug but rather suspect it is simply slow performance in the Projection phase of the Panorama process. 

I'd like to ask you to retest with your files but to allow the Merge process to run for a much longer period of time. It may look like it is hanging but we believe it will eventually complete.  Can you confirm this on your end?
(Edited)
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Sybren Stüvel

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I cannot confirm on my end. CPU usage of Lightroom drops to 0%, nothing happens. I've let it sit for 5.5 hours and it doesn't progress any further. And this is on quite a beefy machine (see specs in my original post).

If the processor load would be a constant 10-15% I would find it warranted to wait longer. It would just be a badly paralellised algorithm, but in time it would finish. However, with no noticable CPU usage, my only conclusion can be that it hangs.

Update: I didn't cancel the process when I posted the above. I've let Lightroom sit for another 2 hours, but still no progress was made. Will let it run overnight and report tomorrow.
(Edited)
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Sybren Stüvel

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I've let it run overnight for a total runtime of 13 hours. Lightroom still didn't progress.
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Sybren Stüvel

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@Rikk Does my re-test change anything in your perception of this issue?
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Victoria Bampton - Lightroom Queen, Champion

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There may be a delay in Rikk replying as Adobe US is on shutdown this week.
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Rikk Flohr, Official Rep

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Sybren, 

 I have passed on your results to the engineers.