Created attachment 178773 [details] Example *** 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 STEPS TO REPRODUCE 1. Make a 2160p project 2. Insert a 2160p H264 clip 3. Make a proxy of the clip 4. Insert the clip into the timeline 5. Add transform to the clip 6. Switch preview resolution to 720p OBSERVED RESULT Preview resolution is unreasonably low. Once Transform is disabled the resolution becomes normal. EXPECTED RESULT Adequate preview resolution when using the Transform effect. SOFTWARE/OS VERSIONS Kdenlive: 24.12.2 MLT: 7.30.0 FFmpeg KDE Frameworks: 6.11.0 Qt: Using 6.8.2 and built against 6.8.2 KDE Flatpak runtime (Xcb) Build ABI: x86_64-little_endian-lp64 Kernel: linux 6.11.10+bpo-amd64
I think it's not "quarter of the resolution" but more like a thumbnail resolution.
The issue is still present in 24.12.3.
Thank you for reporting. I can confirm the issue. Following your steps. I tried with different proxy sizes. As soon as the transform effect is enabled on the timeline clip or on the bin clip it gets blurry.
Fixed in commit: https://github.com/mltframework/mlt/commit/11023db52a8a4d80095e13212aabb1d13bdcafe4
Version 24.12.2 (installed version) Os Windows 11 Hi, For Windows users (if this can help) : Since i have no skill to compile, i proceeded with a solution that's a bit tricky. I switched libmltqt6.dll between two kdenlive versions. I took libmltqt6.dll from 24.12.0 and placed it to C:\Program Files\kdenlive\lib\mlt\ in 24.12.2 version. Now i get a decent preview when using transform filter. Keep up the good work to make kdenlive even more reliable! Waiting for 25.04 to be released. (In reply to Jean-Baptiste Mardelle from comment #4) > Fixed in commit: > https://github.com/mltframework/mlt/commit/ > 11023db52a8a4d80095e13212aabb1d13bdcafe4
Thank you very much for fixing this! Waiting for the next release to test it out (I'm on Linux).