On Shotcut version 25.07.26 use of Outline filter with Rich text generator causes 100% load on CPU and computer freezes even with Use hardware encoder option enabled. Job priority setting doesn’t affect on freezes. Also video export is extremely slow comparing without outline filter.
What is your operating system?
Windows 11 Pro 10.0.26100 build 26100
GPU: NVIDIA Quadro T400 (driver version: 573.48)
What is your Shotcut version (see Help > About Shotcut)?
Shotcut version 25.07.26
Can you repeat the problem? If so, what are the steps?
Add video, add new video track over it, add Text: Rich generator (via New>Text), select video export preset Stock>Youtube, enable Use hardware encoder option, try to export
What exactly do you mean by that? To me, it means the operating system becomes dead even to the other applications running and must be rebooted.
Outline filter is very heavy; the release notes mention that. But I do not reproduce the problem you describe (I used h264_nvenc on Windows 11). It is simply using a lot of CPU and slower with the Outline filter. That is just the way it is; it is not a bug. There are many things you can do in addition to Outline to make it use the CPU heavily. 100% CPU usage is not a bug. There are others who complain when Shotcut does not use the CPU enough. If you cannot tolerate it, then don’t use that filter, or use it in very small amounts.
I mean be freezes that computer became almost irresponsible on any other application where on previous versions even on fully CPU rendering there was no such thing. With hardware acceleration on GPU CPU load was almost unnoticeable