I've got a 1080p mkv, can I take advantage of h.264 in my unibody macbook? Let me start by saying i'm not an expert in codecs, containers, video or audio in general. I have a 4GB, 2.4 Intel Core Duo, unibody macbook with NVIDIA GeForce 9400M (rumored to have h.264 hardware acceleration), and running 10.5.6. A pal of mine gave me a 4.3GB 1080p mkv file and it was basically unwatchable in vlc. The image pixelated and skipped frames. cpu pegged at 95-110%. I installed perian and it was watchable via quicktime, but movie inspector still showed that it was still skipping frames. I was playing an average of 14FPS (out of 24FPS) and the cpu was once again pegged at 95-110%. I went to apple's quicktime site, watched one of their 1080p mov trailer files, and movie inspector showed I was playing 24FPS out of 24FPS and cpu was about 30%. This is great. I suspect the CPU is offloading cycles to the GeForce 9400M. Attatched are some screenshots of movie inspector--one with the mkv file running and the other with the mov apple trailer. My question is, can I somehow get my mkv movie (perhaps by transcoding into a different format?) to remain 1080p, not skip frames, and hopefully take advantage of the GeForce 9400M?