Nate Amsden wrote:
>
> Viktor Rosenfeld wrote:
> >
> > Hi folks,
> >
> > I got mplayer (http://mplayer.sourceforge.net) working very nicely, only
> > that CPU utilization is constantly at 100% (~ 92% user, 8% system) and
> > sound is very broken after 10 seconds playing. The video is fine
> > though.
> >
> > I have a 333MHz Celeron with MMX, use X 3.3.6 from woody, and have a
> > very shitty 4MB PCI graphic card.
> upgrade CPU and video card.
Upgrading the CPU is unfortunatelly not an option, but I'll definately
get myself a new graphic card anytime now so I can use XFree 4.x. I
looked at the file DOCS/SPEED of the Mplayer distribution and found some
very interesting data ...
-----8< snip >8-----
MPEG 1/2 Video codec CPU usage in percent (%) :
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. Setup: mga_vid YUV, MMX idct, no mtrr settings
2. Setup: mga_vid YUV, SSE idct, with mtrr settings
3. Setup: Utah-GLX OpenGL + software C YUV->RGB, SSE idct
4. Setup: X11 Shm (32bpp) + software MMX YUV->RGB, SSE idct, with mtrr
5. Setup: null output (codec speed only)
6. Setup: X11 4.0.1e + Xv extension, SSE idct, with mtrr
1. 2. 3. 4. 5. 6.
DolbyDigitalBroadway.vob: 60% 35% 78% 67% 26% 47%
matrix.vob (trailer): 51% 30% 62% 56% 23% 40%
PAL (352x288/25) mpeg1: 16% 9% 30% 13% 7% 8%
3D anim (30fps mpeg1): 20% 14% 35% 25% 12% 14%
-----8< snip >8-----
When playing to the null output (option 5) his CPU utilization is at
26%. When I do the same CPU utilization peaks at 57%, but usually not
more than 48% or so. So I have roughly a ratio of 57/26 = 2.19.
Multiplied with his value vom X11 Shm (67%), I get CPU utilization of
146% -- no wonder that the sound is flaky! But if I do 2.19 x 47%
(option 6), I'm at 103% peak usage. It's gonna bog the CPU down, sure
enough, but it might just be fast enough. If I get a Matrox card, I can
use his mga_vid driver (option 2) yielding 2.19x35% = 76% utilization!
Or maybe I'm just too optimistic. :)
> testing now a 512x224(23fps) DiVx with 1500kbit/s 48khz stereo sound
> looks like aviplay is hoveraing around 25% utilization. doubling
> the size of the video(still windowed not playing fullscreen)
> increases cpu to 31-36%. fullscreen works fine too. never drops
> a frame or skips an audio beat
>
> runnin 1600x1200x16bit @ 75hz. also playing the DiVx over NFS,
> so that may take some of the cpu ....who knows.
Good for you. :)
Thanks,
Viktor
--
Viktor Rosenfeld
WWW: http://www.informatik.hu-berlin.de/~rosenfel/
