[kimiraikkonen]

adicoto,
As i mentioned, the video(s) that cause frame drop or jitter after seeking is all about a tiny 320x240 @ 29.91 fps, not a HD one, and there are other files like that which are played very fine if i don't seek and leave playback alone(no other stuff on computer such as not exploring GUI-requiring apps.). And this file only costs about %8-10 CPU during playback.

Here is media info report if you interest in it as attachment.

BTW, i seek by clicking on a point on timeline and goes to a time and continues to playback directly, not using Fast Forward. (FF)

Indeed, yes a sudden action on playback such as seeking(an hitting a hole in your sample) may cause temporary instability, but is it acceptable?

Thanks.