I finally got the updates to work from 108 to 314 but the Preview is now VERY laggy and the rendering speed has now doubled or more. In 108 the Preview Window played fluidly, even with a LUT Filter applied and Color Grading and the Rendering was very fast at 4K.
I believe upgrading to 314 "unselected" your graphics card under the GPU Acceleration of Video Processing option. This happened to me when I installed it.
Under the menu option "Preferences" select the "Video" tab and make sure you have your graphics card selected under GPU Acceleration of Video Processing.
Builds after 208 seem faster for decoding media but are much slower with Fx like the color grading panel. I assume this will be addressed with VP22.
I believe upgrading to 314 "unselected" your graphics card under the GPU Acceleration of Video Processing option. This happened to me when I installed it.
Under the menu option "Preferences" select the "Video" tab and make sure you have your graphics card selected under GPU Acceleration of Video Processing.
Checked all that after install. All good. The only thing that makes it even "doable" is to go to FILE I/O and put the RAW Processor to Use and Hardware Decorder to OFF and check Enable Legacy AVC decoding. BUT as soon as I apply Color Grading at all it slows to a crawl.
Version 108 was flawless in Preview even after apply a LUT Filter and Color Grading. Also the Rendering Speed was almost double what it is with verion 300 or 314, BUT 10 Bit DJI and SONY Camera footage is unusable in 108 and THATS why I updated.
As a matter of fact, I just changed the GPU Acceleration of Video Processing to OFF and now the Color Graded files play pretty good. So basically versions 300 and 314 have made my video card useless. I personally think Vegas 300 and 314 is NOT using the GPU correctly. To be honest I had RAW Processor to Use and Hardware Decorder to OFF even on version 108. But I still had GPU Acceleration of Video set to my nVidia GTX 3060. Luckily my Intel i9-13900KF 3.00GHz can handle things pretty good but I HATE putting all that load on it.
It is using it correctly for decoding for the first time. I'd keep that on. The rest is a work in progress.
If the system works great with your powerful processor - good. Unfortunately, the rebuild of the video engine is still ongoing. And the support for the CGP is based on the processor only, at the moment. For LUTs you could try to use the separate LUT plugin, if you main requirements are LUTs. Are you using raw? If not, the raw settings should not be important.