SUMMARY After rendering, clips in resulting video are scaled using some kind of interpolation (if resolution is low (eg. in pixelarts), they look very blurry). This doesn't happen when looking at the preview though. STEPS TO REPRODUCE 1. Get a low resolution image (for example, this pixelart: https://i.imgur.com/0UGgh9K.png). 2. Create a new Kdenlive project (I used 1280x720 resolution, it shouldn't matter as long as it's bigger than images resolution). 3. Add this image as a clip. 4. Insert it into the timeline. 5. Check out the preview (here is mine: https://i.imgur.com/bmKvJ2s.png). 6. Render the project (I used H264/AAC renderer, but it shouldn't matter). 7. Check out the result (here is mine: https://youtu.be/f6bNdG30_Do). OBSERVED RESULT Preview shows sharp image, without interpolation. Rendered video shows blurry image, with interpolation. EXPECTED RESULT Preview shows sharp image, without interpolation. Rendered video shows sharp image, without interpolation. SOFTWARE/OS VERSIONS Operating System: Debian GNU/Linux KDE Plasma Version: 5.17.5 KDE Frameworks Version: 5.70.0 Qt Version: 5.14.2 Kernel Version: 5.7.0-8.3-liquorix-amd64 OS Type: 64-bit Processors: 4 × Intel® Core™ i5-2400 CPU @ 3.10GHz Memory: 7,7 GiB ADDITIONAL INFORMATION I suggest adding an option to disable or enable interpolation in clip preferences, like in GIMP for example. Preview also needs to be fixed to display right interpolation.
Still the case for 20.12.1. Also checked with the official AppImage (https://download.kde.org/stable/kdenlive/20.12/linux/kdenlive-20.12.1-x86_64.appimage).
In the menu go to Monitor -> Monitor config -> Interpolation and change to a better setting. Does that work better?
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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!
(In reply to farid from comment #2) > In the menu go to Monitor -> Monitor config -> Interpolation and change to a > better setting. Does that work better? Well, it makes the preview blurry too, so it is *consistent* with the resulting render, but still isn't *good*: https://grzesiek11.stary.pc.pl/files/images/Screenshot_20210511_011827.png Ideally, I want to be able to choose how a specific clip will be interpolated (so I can choose "none" for a pixelart, and "cubic" for a photo), and both the monitor and rendered file will be consistent with that setting. So I'll say it's still the case in 21.04.0. PS. Sorry for being that late, but I didn't notice the e-mail in my inbox...
I think I should close this ticket and open a new one as a feature request. Is that correct?