Nick sorry to jump on this, i was re-reading all the tips (to see and recheck if everything is ok on my side) and i believe that there is some info that is no longer relevant (or i missed something) :
on this https://www.inklen.com/mixemergency/tips/mixemergency-3-optimisation
you wrote
" You can check whether GPU-acceleration is being used for a video by opening the Info window of MixEmergency. This will list either "CPU", "GPU / Hap", or "GPU / H.264" as the method of decoding "
but when i open the info window there is nowhere this information.
the INFO window shows :
frames per second / video ram / output / pipeline / previews / refresh rate
size / buffer / back / for (x2)
also the "In the Advanced Preferences of MixEmergency, ensure that the preference "Enable GPU-Accelerated Video Decoding" is enabled (this is enabled by default)."
but this dosent exist anymore on the advanced preferences