SUMMARY (1) Lag when play this mp4 on the timeline. (2) Lag when move timeline cursor for this clip and play it. (3) Cannot show background (this video clip) in Title window. STEPS TO REPRODUCE 1. Download this mp4 from the following URL: https://www.pexels.com/video/rotation-of-the-planet-earth-854225/ 2. Import this mp4, then drag it onto the timeline. 3. Try to move your timeline cursor to some place of this clip, play it. 4. Try to add Title, and check [v] Show background in kdenlive - Title window. OBSERVED RESULT (1) Lag when play this mp4 on the timeline. (2) Lag when move timeline cursor for this clip and play it. (3) Cannot show background (this video clip) in Title window. EXPECTED RESULT (1) Play this mp4 smoothly on the timeline. (2) Move timeline cursor smoothly for this clip. (3) Show background (this video clip) in Title window. SOFTWARE/OS VERSIONS = Microsoft Windows 10 ADDITIONAL INFORMATION = all bugs shown above can be seen on version 18 (serveral versions). = It seems the problems of kdenlive kernel (you should consider it seriously). = the play performance of kdenlive 19 worse then the alpha version of olive editor (so sad).
Thank you for reporting the 2 issues. Playback: On my Win7 machine playback is sometimes smooth and sometimes not. I don't know why. We heard several times that playback performance on 19.04 is worse then on 18.12 but we don't found the root cause so far. Do you have switched the project settings to 1080p30fps? Which graphic card and driver version do you use? Hit windows+r enter dxdiag and check if tab graphic show issues in the notes field. BTW: The team is aware of the bad timeline performance and is checking for different solutions of GPU integration. Titler: I opened issue https://invent.kde.org/kde/kdenlive/issues/311. Workaround: enable Show Background and switch between Checkered/Black/White. As the titler gets completely re-written I don't know if this gets fixed quickly.
Issue of titler should be solved. Please try with the nightly build https://binary-factory.kde.org/job/Kdenlive_Nightly_mingw64/lastSuccessfulBuild/artifact/. Play lag: - on bottom left of the monitor reduce playback resolution. - Hit CTRL+SHIFT+, (comma) -> Playback -> Audio backend -> play around with WinMM, Wasapi, DirectSound to see what give the best performance.
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!