With mplayer-hq I can give appropriate parameters via '-lavdopts' and gain reasonable perfomance to view 720p h.264 video on my Atom laptop almost without framedrops. Sadly, just almost.
Most of time, CPU usage is about 70-80%, sometimes it's even drops to 50%. Enough time to decode forward through hard places, but MplayerXP gives me nothing, because it's uses decoder with default parameters which are absolutly not acceptable for this CPU. It's perfomance much worse than mplayer-hq.
So, is it possible to add CLI options to pass parameters to decoders? Something like -lavdopts.