On my home theater big-screen, Blu-ray playback stuttered and badly and it varied, as sometimes it was smooth and other times it was not.
Local playback (files stored on the local hard drive) was much smoother than network streaming.
The networking tab of Windows task manager showed deep nulls (data rates going down to zero). Network playback must be smooth with certainly no dips half below the average rate.
The possible solution can be easy to complicated. I'll offer a few which worked for me:
0) Check if the Intel processor has Speed-Step enabled in the BIOS menu. Disable this guessing on Intel's part on each computer. The free program CPU-Z will display the processor core clock, and let you see if the speed is "hopping around", in a rather poor, unsuitable manner for hard real-time (video) programs. I think this was the root cause of the network stuttering.
1) Allow exceptions for typical video and audio files by the virus scanner
2) Establish a clean baseline by reinstalling the latest Ethernet drivers from Windows Device Manager. Do this for all computers on the network.
Realtek drivers are here:http://www.realtek.com/downloads/dow...&GetDown=false
Leave everything default except for MTU which I set to 9K, since were streaming. Other settings (like off-loading) are pretty dangerous, and can choke your streaming. Ridiculous but true.
Then, with Windows Task Manager->networking->network utilization monitoring, copy video files between computer desktops. For Gigabit Ethernet you should see 80-90MB/sec (9*8 = 720Mbits/sec).
3) Uninstall the ATI/AMD drivers/software completely from the Control Panel, then reinstall, then reinstall Power DVD 10
4) make sure the buffers are enabled if you use Virtual Clone Drive program
5) Disable Internet Moderation in the Device Manager-> Network Card ->Advanced properties
6) allow big Jumbo Frames (9K) in the same advanced properties
7) power saving features are nice when they don't cause performance degradation.
Motion jerking can also be caused by selecting the incorrect video vertical refresh rate (24 or 30Hz) for the particular source. Look at the information box in PowerDvd to see what rate the disc was mastered at.
Then select a video refresh rate to be the same or multiple (with zero remainder) which s best compatible with the display. For most its 24 or 60Hz.
I already designed for the most power efficient htpc. However it must be able to run instantaneously and at full throttle too. Speed-step is obsolete and should be eliminated, as its behavior leads to unpredictable, inconsistent results which are tough to track down.