[vlc-devel] swscale painfully slow on slow machine

Rémi Denis-Courmont remi at remlab.net
Tue Oct 6 17:07:43 CEST 2009

Le mardi 6 octobre 2009 17:33:48 jboileau, vous avez écrit :
> I have tried playing with some of the preferences without any luck. Does
> anyone have any ideas of what options I could play with that might help get
> the cpu usage down? Is swscale known to be inneficient with some hardware
> configurations? Is there an alternative to swscale?

Yes. Hardware scaling. Software scaling is going to be slow no matter how 
optimized the algorithm is.

> The machine configuration: Celeron 1ghz using Windows XP embedded and a
> basic graphics card, the kind that is part of the motherboard. I am trying
> to play h264 video 320x240. My tests where done with 'overlay' disabled

The *whole* point of the overlay is to do hardware scaling. If you turn it 
off, it shouldn't come as a surprise that VLC gets slow.

Rémi Denis-Courmont

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