gmplayer doesn't play smoothly on 11.3

I just upgraded (full reinstall inc. format) from 11.1 (32bit) to 11.3 (64bit).
Everything is working correctly except gmplayer (installed from packman).

If I play movies using gmplayer they do not play smoothly, but the strange thing is if I play the same file with mplayer from a terminal it does play smoothly.

If I play the file from a terminal with gmplayer no errors are reported…

Anyone here know what this might be?

Thanks,
Hein

Did you follow this
Multi-media and Restricted Format Installation Guide

this sounds a bit like you have compiz running " desktop effects"
if so turn them off first
if that dose fix it then you most likely have a built in 3d chip and not a full 3d card , or this is a laptop

No, I just used webpin to search for mplayer and install it from there.

OK, tried it and it plays smoothly then. But why does mplayer play smoothly and gmplayer not? Gmplayer is just a wrapper fom mplayer, right?
It is a laptop, it has a NVIDIA chipset, but I use the nouveu driver.

Gmplayer is just a wrapper fom mplayer, right?

yes and no

are you running the default KDE desktop if so then gmplayer is putting a LOT of work running kde AND gnome for the GnomeMplayer

if running the Gnome desktop them mostly just a wrapper

on almost all laptops , except for the very high end ones, compiz AND a video put to much strain on the built in GPU seeing as it is also working with the CPU also
the built in chip uses a lot of cpu IO calls and uses the system ram as the GPU ram
for the web a built in chip works but you can not do too many things at the same time

it is NOT a desktop/ workstation after all

also that how to link posted above IS A MUST
the codecs in the oss and non-oss ARE NOT compatible with the pacman video codecs

they mostly work but not 100% correct
use yast to reinstall ALL video related rpm’s from pacman

there is an option to “change vender” in the gui .

Follow the guide
Try smplayer too