I've been battling this same problem for quite a while. I try some "fix" and it "seems" to work, but then . . . no . . . I still get a slight "stutter" when watching most video files (i.e. mp4, mkv, mpg, etc.). Blu-rays and DVDs play 100% perfect.
It's not the encoding of the above video files that's the issue, as they all play 100% smoothly on other players I have---like jRiver Media Center 21, Zoom Player Max, VLC.
I also should state that I purchased 3 PowerDVD 15 Ultras---2 desktops and a laptop (all running different OSes, vid cards and from different computer manufacturers). So it's very very unlikely it's an OS or comp manufac. issue.
I've tried every "fix/suggestion" I can find---NOTHING has yet made a difference.
Things I have done:
--uninstalled [using an agressive unistaller porgam to remove every bit of Powerdvd 15 ultra]
--re-installed the basic build of the program, then incrementally installed each update---and testing a video at each point
--rolled back my graphics drivers (I have a GeForce GTX980 card on the desktop I was doing all this with)
--turned on/off a vareity of features within power dvd [like the video enhancements, hardware acceleration, etc]--and tested each change
--swapped out the HDMI cable from the comp to the monitor to a DV-D cable [a cyberlink tech INSISTED that the hdmi cable was the problem (????) and of course that made no difference either]
--turned on/off a variety of features within the graphics card control panel--and tested each change.
NONE of the above things I tired corrected the stutter problem.
My only recourse has been not using my expensive Power DVD 15 Ultra I paid for; but to use the other software I mentioned above---2 of which I paid for as well (jRiver Media Center 21, Zoom Player Max)---and the free VLC player.
All of these are excellent, but so far, none beat the picture quality of powerdvd--jriver and zoom come very close (about 95% close).
Does anyone have a fix that worked for them? I am utterly open to just about any idea/suggestion/etc.
This message was edited 2 times. Last update was at Jan 27. 2016 16:52