When playing mkv h264 720p video with mplayer, it selects by default vdpau video output and ffh264 video codec.
When playing the same video with smplayer, it selects ffh264vdpau video codec. That causes high framerate drop (down to 17 fps).
Judging from codec names, ffh264vdpau should be selected, but as mplayer by default chooses another codec and causes no problems, I decided to report about this issue.
Cpu load is the same in both cases — ~20% (isn't it very high, btw?).
System details:
OS Archlinux i686
DE KDE SC 4.5.1, WM kwin, composition enabled
Core2Duo E6550
Nvidia GeForce 8600GT
Oh sorry, looks like it is fixed in svn. Now ffh264 is selected by default.
I should check it before posting.