[MPlayer-users] "too slow" even with a modern system?

[Grant]

I'm getting the "Your system is too SLOW to play this!" message even with:

-lavdopts fast:skiploopfilter=all:threads=4

I'm trying to play a 1080p MTS file created by my Sony digital camera
and video is smooth but audio is out of sync.  My system is a Dell
XPS13 Ultrabook.  Is there anything I can do?

- Grant