ATTENTION: If you do not use an Nvidia graphics card 8xxx or higher, this thread is not for you!
http://neuron2.net/dgavcdecnv/dgavcdecnv.html
If you want to assess the GPU performance, please read the section "Disable Display" in the users manual. And set the playback speed to Maximum under Options/Playback Speed! I am still optimizing frame rates and CPU utilization. Be aware that when serving through AVCSource() the performance will be comparable to that obtained with the display disabled (Disable Display option enabled).
I'm also interested in finding out what streams fail with GPU decoding, so please report them, preferably with stream details and a sample.