Video stuttering on playback

Mac Mini, mid 2011 (2.3Ghz i5), 8G RAM, OSX 10.9
Intel HD Graphics 3000 512MB
I've tried both Quicktime and VLC. When I playback HDTV.x264 mp4 videos I get periodic stuttering / hesitation. They do seem to occur most often when there is a moving, wide shot (although not every time), but they occur at other times as well. It makes watching a show/movie tough.
80+% CPU idle, Memory is in good shape, disk activity is low, and the monitor is connected via an Apple Thunderbird/HDMI cable.
Any suggestions as to what I can do to fix this? Is there a different media player that would work better? Or a setting somewhere?

Have you looked at the previous discussions listed on the right side of this page under the heading "More Like This"?

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Darrell110 posted in macromedia.dreamweaver
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