Zip the log, drag and drop here here or click the upload button to attach the log.
Likely the profile you’re using doesn’t use ffmpeg or has hardware encoding forced disabled. Did you enable hardware encoding your conversion task expert settings page?
I use the same (only 1) profile since I started w/ the paid MCEB version and HW encoding has been enabled ever since. Hopefully the logs show something. Also, fwiw, this started when I added an Nvidia card (GTX 1070). Prior to that MCEB was using my onboard Intel display adapter (Quicksync) to offload re-encodes. I can post one of those logs too if that would be helpful.
Update to the latest 2.4.9 beta version and change the order in your profile to have ffmpeg first (ffmpeg is used for NVidia and handbrake is used for intel).
order=ffmpeg,handbrake
Now it’ll use Nvidia first and then fall back to Intel