https://bugs.kde.org/show_bug.cgi?id=423115

            Bug ID: 423115
           Summary: Using GPU processing on AMD Radeon causes multiple
                    crashes / corrupt video on render
           Product: kdenlive
           Version: 20.04.1
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: Video Display & Export
          Assignee: j...@kdenlive.org
          Reporter: k...@pyoor.org
  Target Milestone: ---

Created attachment 129455
  --> https://bugs.kde.org/attachment.cgi?id=129455&action=edit
example of corrupt video output.

SUMMARY
Enabling GPU processing caused repeated crashes when navigating the timeline or
playing back video, also produced corrupt video when rendering attempted.

STEPS TO REPRODUCE
1. Enable GPU processing
2. Attempt to play video or move in timeline - frequent crashes
3. Press Render video

OBSERVED RESULT
Editing - turning on GPU processing having edited a video, just for export (as
an experiment) produced video that was corrupt:

Either as attached screenshot (frames from different tracks showing
simultaneously) or at a transition from one track to another, the video would
freeze but audio would continue. This appeared to only happen transitioning
from the 4k mp4 sources to the 1080p mov sources, but would last until another
mp4 source on another track started.

EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Ubuntu 20.04LTS (Ubunto Studio Focal Fossa)
(available in About System)
KDE Plasma Version:  Xfce 4.14
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
AMD Radeon RX580 / Asus X570 Motherboard / Ryzen 5 processor.

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