I have use Intel QSV successfully with an i5-2500K in the past with Vegas 14 and 15. I upgraded my motherboard (Asrock Z-370 extreme 4) and processor to an i5-8600K, Windows 10 (no creator's update) didn't flinch at the new motherboard, installed new drivers fine, everything works well... except when I try to render with QSV. Rendering with the AMD video card works fine, just slow.
Here is a screenshot showing that QSV is available. My project settings match the selected output.
And another one showing QSV is specifically selected in video options- though the error is the same when the AMD is selected instead.
And this is the error
it says "An error occurred while creating the media file... the reason for the error could not be determined"
My first thought is.. Such a helpful error message. LOL
As I said at the beginning, I have done this many times in Vegas 14 and 15. Google searches for this error have not yielded any solutions so far, though I may be missing something obvious. It could be that the new Intel graphics driver broke something? I've tried to install an older version, but it kept telling my my system did not meets it's requirements, and quit. I gave up at that point and posted here. The GPU shows up in my device manager, no errors.
Any ideas?