Skip to main content
DClark064
DClark064
August 5, 2026

P: LrC 15.5 Video Files Issues (Windows)

  • August 5, 2026
  • 91 replies
  • 2001 views

I updated to LrC 15.5 a few hours ago.  Since then LrC has problems with video files.  The first problem I noticed was that when I tried to synchronize a folder that had two new video files.  After a couple of minutes I got the error message “An unknown error occurred while reading the video file. (2)”.  I had just completed those files with DaVinci Resolve so I went back and produced the same files again to check if DR had made an error.  When I tried again with the new files but got the same errors.  I was able to play both videos without any issue using VLC Media Player, so they seem to be OK.  I then shutdown LrC and did a backup including optimizing the catalog, and then restarted it to see if that made any difference, but same error.  Then I started looking at other videos that were already in LrC and found that when browsing them in the Library module, most of them pop up a message “There was an error working with the video”.  They will not play in LrC but work fine with VLC Media Player. 

Prior to upgrading to 15.5 I did not experience any of these errors. Is anyone else seeing these problems?

 

      91 replies

      Show previous replies
      DanSidious
      Participating Frequently
      August 29, 2026

      Interesting that this has been around for almost a month without official feedback from Adobe?

        georgen74268845
        Participant
        September 2, 2026

        Their motto is “Let sleeping dogs lie.” 

        DanSidious
        Participating Frequently
        August 29, 2026

        I can reproduce this same bug on my PC on both 15.5 and 15.5.1 - affects newer mobile phone videos as well as footage from my GoPro Hero Black 13. Downgrading to 15.4 fixes it so definitely not an issue with my PC setup. When will this be fixed???

        AnnC
        Participant
        August 28, 2026

        On import Lightroom Classic fails to generate the thumbnail preview and gives an "unknown error occurred while reading the video file" error and fails to import Nikon Z8 H.265 10-bit video clips.

        Lightroom Classic 15.5 and 15.5.1
        Windows 11 version 25H2 Build 26200.9278.
        Camera model is Nikon z8

        Step-by-Step Instructions:

        1. Set Nikon Z8 to record video in H.265 10-bit (MOV) format.
        2. Copied .mov file off camera card and to a computer hard drive location to eliminate an issue with importing for the CFExpress card.
        3. Opened Lightroom Classic and selected Import. Navigated to hard drive location with .mov files. Lightroom Classic shows the file name. Instead of showing a preview the text “Preview unavailable for the this file” is displayed.
        4. Check marked and clicked import
        5. Import results window is next displayed with the following text. “Some import operations were not performed”. “An unknown error occurred while reading the video file (2)”. This is followed by a list including the names of the H.265 10-bit files that were not imported.
        6. Closing the window shows the message “No photos in previous import”

        Expected result: The video file should generate a preview thumbnail and import successfully, as it did in the previous Lightroom versions. Last version where this worked is 15.4.1.

        Actual result is the file fails to load with unknown error. Have also noticed that in Library mode that LRc will display different error message when displaying previously imported H265 10-bit files. Assume that this is related to the import issue.

        Current workaround: Reverting back to LRc 15.4.1 allows import of H265 10-bit video files generated by the Nikon z8. And limited play back in Library module. Have also confirmed that version 15.5 can import H.264 8-bit video clips generated by the Nikon z8. It is just failing to import H.265 10-bit. It also will not import H.265 8-bit.

          ColdForest
          ColdForest
          Inspiring
          August 28, 2026

          The crazy thing is that this bug continues to be tagged with “Needs more info”(??). Really?

          Bug Reports

            AndreapennA Photography
            AndreapennA Photography
            Participating Frequently
            August 28, 2026

            I keep sending “report bug” every single time I’m importing a new wedding - with the error message. This is getting ridiculous.

              AndreapennA Photography
              AndreapennA Photography
              Participating Frequently
              August 28, 2026

              Same issue here. Impacting my wedding workflow massively and 23days and still no fix!?!?!?!?

              johnrellis
              johnrellis
              Legend
              August 28, 2026

              [View this post in your web browser. It contains formatting and images that don't appear in email.]

               

              ​@AndreapennA Photography Impacting my wedding workflow massively and 23days and still no fix!

               

              Based on years of past observation here, and given you can work around the bug by rolling back to 15.4.1, I think it’s likely that Adobe won’t release an emergency patch for this (15.5.2) but rather will deploy a fix in the upcoming release.  If they stick to the same schedule as in past years, that will be the beginning of the Adobe Max conference, the week of November 8.

               

              (I’m just giving an educated guess, so don’t shoot the messenger.)

              AndreapennA Photography
              AndreapennA Photography
              Participating Frequently
              August 28, 2026

              it is what it is as they say but... 

              alanw22773867
              alanw22773867
              Participant
              August 27, 2026

              Problem not fixed with update LrC version 15.5.1 See my other posts in this thread regarding videos not loading or those already loaded into LrC, not playing.

                andreasw5942258
                andreasw5942258
                Inspiring
                August 26, 2026

                Same issue with Lightroom Classic Version 15.5.1 on Windows 11 Pro.
                Regards Andreas

                  NickMcG
                  Inspiring
                  August 27, 2026

                  Disappointing - in the absence of a target resolution date for this SEV1 problem, I’m going to have to abandon ship for my project. Any suggestions for a product I could replace it with?

                  andreasw5942258
                  andreasw5942258
                  Inspiring
                  August 27, 2026

                  No, I do not have any idea. The only possible action is to step back to 15.4.1

                    thomasn11730690
                    Participant
                    August 25, 2026

                    I can reproduce the issue. After updating to version 15.5, the support for H.265/HEVC videos disappeared. The import window was not able to present the previews and later I have got a dialog listed all the failed H.265 videos. The import of H.264 videos still works. After downgrading to 15.4.1, I was able those videos. The updating to 15.5.1 the import of H.265 videos fails again. Another downgrade to 15.4.1, it works properly again.

                      johnrellis
                      johnrellis
                      Legend
                      August 25, 2026

                      [View this post in your web browser. It contains formatting and images that don't appear in email.]

                       

                      ​@Jorge31291960f9zv I opened a support ticket with Adobe, and they DO NOT ACKNOWLEDGE THAT THE PROBLEM IS WITH LIGHTROOM 15.5

                       

                      Ignore what Adobe customer support tells you -- they are often pretty random and not to be trusted. Reports in this section of the forum (Bug Reports) are in general the most reliable indication of the status of bugs.  The forum moderators ensure that this forum only contains bugs acknowledged / being investigated by Adobe. (I don’t work for Adobe.)

                      Jorge31291960f9zv
                      Participant
                      August 25, 2026

                      El problema se produce al importar videos Códec: H.265 / HEVC. En mi caso realizados en cámara Sony. Veo los videos perfectamente con Windows Media Player con Windows 11. Tampoco tengo problema para trabajar con ellos con DaVinci Resolve. Si los guardas como H264 no tienes problemas en importarlos con Lightroom. Abrí una consulta con Adobe y NO RECONOCEN QUE EL PROBLEMA SEA DE LIGHTROOM 15.5

                      ., dicen que el error es debido a los codecs de Windows 11. He actualizado codecs en Windows 11 y el problema persiste. Además no tiene sentido que me den esa respuesta cuando el reproductor genérico de Windows me abre los videos sin problema. No creo que la solución sea cambiar la configuración de mi cámara o pasar mis videos a H264 ni tampoco volver a una versión anterior de Lightroom. No sé además si eso afectaría a la edición de mis fotos anteriores. Entiendo que es un problema de ADOBE que no quiere reconocer y no se solucionará hasta que saquen una nueva versión.

                       

                      Show more replies
                      Terms & ConditionsAccessibility statement
                      Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices