Thanks. the thing that helped most to fix the skipping was to activate the mmap feature. Set settings to show "all". Input/Codecs -> Access Modules -> MMAP -> Tick "Use File Memory Mapping" Save. Just setting that H.264 thing to see if it makes things even better. Oh nice, I'll ...
Just a tip:
I was having the same problems and it seems to have pretty much stopped when I went to "Input & Codecs" preference tab and set "Skip the loop filter for H.264 decoding" to "All"...
Won't hurt to try!