SUMMARY I'd like to cut away 100px of a 4k@30 video using the "cut edge" effect. With it KDEnlive uses around 14% of CPU resulting in roughly 27 fps. If I activate the checkbox "Automatic central cut", which however reverts my aim to cut the lower 100px, I see around 40% of CPU usage resulting in roughly 114 fps. Command for rendering: f=mp4 movflags=+faststart vcodec=libx264 progressive=1 g=15 bf=2 crf=%quality acodec=aac ab=%audiobitrate+'k' The encoding slider is set to the far right (maximum) and #threads to 24, using the parallel processing feature. Is there a some bottleneck in the effect's code respectively could it be speed up? SOFTWARE/OS VERSIONS Operating System: Manjaro Linux KDE Plasma Version: 5.21.3 KDE Frameworks Version: 5.80.0 Qt Version: 5.15.2 Kernel Version: 5.12.0-1-MANJARO OS Type: 64-bit Graphics Platform: X11 Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: Radeon RX 580 Series
Hi and thank you for your patience. Can you please check whether this issue still exists in the latest version 24.12.0? If yes, please update this report to reflect the new version. If it works now like you expect it would, you may change the status of this report to RESOLVED - FIXED. At any rate, this report will be closed if there is no activity for the next 30 days.
> Hi and thank you for your patience. I've totally forgotten about it. :-) I've tested playback of a mp4, h264, FullHD, 60 fps: * Without Cut Away: 120% CPU * With Cut Away: 160% CPU utilization in htop averaged roughly over 10 seconds, whereby Cut Away was set to 0 pixels on each edge, meaning essentially do nothing. Rendering seems to be equally slow or fast for both cases. I'd say, works for me! Happy holidays!