How I encode works fine. It just happens to be that before I updated, wine somehow ran multiple instance out of the same prefix directory, and then when I updated it didn't. Some sources are 1080p 8-bit videos, some are 2160p 10-bit HDR videos. The stuff gets viewed on a 4k HDR TV anyway. You don't need anything other than a beefy CPU to simply encode video. That's all I'm doing here, and cropping, which is a simple task. Professional video editing requires fast disk access and lots of RAM.