When creating MP4's with H.264 codec and the youtube hd widescreen preset, I find that the file created stutters really badly in both Windows media player and quicktime and power dvd. I have also found this with other presets I have found. When these files are uploaded on youtube, they play back fine but I want to be able to watch them on my pc as well. I am running Windows 7 with a Core I7 processor and plenty of ram. Please help!
Background processes/services or disk setup may be the cause of this. Hard to tell withour details.