The recent update of coreavc has made using Avisynth/Mencoder better than mencoder for me. It uses Nvidia cuda
acceleration on avc/h.264 using hardware of your GPU. Now most 1080p use very little CPU usage. I suggest you all try it out for people that have problems with stuttering on 1080p mkv encoded in avc/h.264. Make sure you use the 182.05 beta drivers to get cuda
acceleration working. It is highly recommend for people with slow cpus.
Oh, only Nvidia GPUs that support cuda
works for now.