SUMMARY When transitioning between two png images of text on a background with shadows the transition is not executed correctly it appears that the shadow is drawn for the full frame before the transition effect reaches it. I've made a testcase project https://drive.google.com/drive/folders/1APYCPEytd3Kbdc4zoS4Nnl4Cl88jsCAx?usp=sharing STEPS TO REPRODUCE 1. generate png with text and shadows in libreoffice impress 2. place such png in kdenlive 3. transition with wipe set to anything other than disolve OBSERVED RESULT Drop shadow appears for the to image at the beginning of the transition EXPECTED RESULT Shadow appears with other transitioning content SOFTWARE/OS VERSIONS Windows: macOS: Operating System: Debian GNU/Linux KDE Plasma Version: 5.17.5 KDE Frameworks Version: 5.62.0 Qt Version: 5.12.5 Kernel Version: 5.6.0-2-rt-amd64 OS Type: 64-bit Processors: 4 × Intel® Core™ i3-4150 CPU @ 3.50GHz Memory: 15.6 GiB of RAM ADDITIONAL INFORMATION
Tested with Kdenlive 23.08.4. Wipe-Right or Wipe-Down does the trick. Can you confirm?
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The test case still fails on 28.08.04 on debian sid for me. I will try the snap/flatpack when I get a chance.
Please check with the AppImage as well.
The problem is that the shadows in your png images are in fact a transparent areas. This is why you get such strange result with the Wipe and Luma method. You can use the "Wipe Down" transition instead that works very closely but handles alpha channel differently