Troubleshoot video issues in Lightroom 4

Adobe Photoshop Lightroom 4 contains many new video features including trimming, editing with Quick Develop, applying develop presets, and exporting.

See Video Support in Lightroom 4 for supported file formats and other data on the video features in Lightroom. 

To optimize Lightroom's performance, see Optimize Performance in Lightroom

Video and import stop working, or error Adobe QT32 Server.exe occurs. (Windows)

If you are having an issue working with video files in Lightroom, use these suggestions to determine where the issue lies and how to resolve it.

• If your video file is not one of the supported formats, Lightroom 4 cannot import it. The list of supported formats is here: Video support in Lightroom 4 and 3.
• If QuickTime is not installed and videos don't import, install QuickTime and retry importing the videos. If QuickTime is installed, make sure that you have the most recent version.
• Determine whether you can import a still image to verify whether Import is working correctly.
• If video files from this camera have successfully imported into Lightroom previously and were created using the same settings, import a shorter video file.
• Connect the camera directly to the computer, bypassing any camera readers, use a different cable or port on the computer. 
  
• Restart your computer and retry importing.
  
• (Windows only) If you have restarted your computer and still cannot import video files, make sure that the following processes are stopped in Task Manager.
  • dynamiclinkmanager.ex
  • dynamiclinkmediaserver.exe
  • amecommand.exe
  • Adobe QT32 Server.exe
• Make sure that any parental control applications, such as Net Nanny, have not blocked access to Lightroom's dynamiclinkmanager.exe and dynamiclinkmediaserver.exe files. Add Lightroom as an exception to any such application that you have running.

• If QuickTime is not installed and videos do not play, install QuickTime and retry playing the videos. If QuickTime is installed, make sure that you have the most recent version.
• Restart your computer and retry playing your videos.
• Export the video file with File Settings > Image Format set as Original. Then, import the exported copy back into Lightroom and see if it plays correctly.
• Open the clip in a video playing application (for example, QuickTime Player or Windows Media Player).
• Has another application changed the file since it was imported into Lightroom?
• (Windows only) If you have restarted your computer and still cannot play video files, make sure that the following processes are stopped in Task Manager.
  • dynamiclinkmanager.exe
  • dynamiclinkmediaserver.exe
  • amecommand.exe
  • Adobe QT32 Server.exe
• Make sure that any parental control applications, such as Net Nanny, have not blocked access to Lightroom's dynamiclinkmanager.exe and dynamiclinkmediaserver.exe files. Add Lightroom as an exception to any such application that you have running.

QuickTime is sometimes necessary to import or play video files in Lightroom 4. The first time video is used, Lightroom checks to see if QuickTime is installed and warns you if it is not. If QuickTime is not installed, it's possible that some video files won't import. If you ignore the warning, and your videos import and play correctly, then QuickTime is not required. If some videos don't import, try installing QuickTime.

Video file formats can be complex. Some video file formats, including AVI and MOV, are container file formats. The data inside these container files is encoded according to a particular codec. Codecs (code/decode) are algorithms for compressing video and audio data. Many different codecs exist and although Lightroom contains numerous codecs, it's possible that some video files need QuickTime to import. (Lightroom uses codecs to read video files when importing and playing)