Created attachment 184330 [details] Screenshot of the error message *** If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports Please remove this comment after reading and before submitting - thanks! *** SUMMARY I was making a short animation at 12 fps with audio and tried to render it. I've done it before and know the process, so I just clicked the button. I prefer to render as an .MKV, though the problem still happened when I tried other formats. The rendering would get to 98% and then cut to an error message with "Unknown Error." The animation is only 500~ frames. STEPS TO REPRODUCE 1. Animate something IDK 2. Try to render? 3. OBSERVED RESULT Render would fail for unknown reason. EXPECTED RESULT Animation. Rendering. SOFTWARE/OS VERSIONS Windows: yes macOS: unsure (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION