[mythtv] Sucess! mythtv no X-Window

Adam Wood AdamWood at Xephi.co.uk
Wed Dec 3 17:18:55 EST 2003


Would you mind posting where you got the software you've listed please.
Well only the kernel and cle266vgaio really. The rest is obvious. I'm
compiling a gentoo box right now although I'm probably going to setup X
I think using DirectFB would a really good idea.

Thanks

Adam

> -----Original Message-----
> From: mythtv-dev-bounces at mythtv.org 
> [mailto:mythtv-dev-bounces at mythtv.org] On Behalf Of Steve
> Sent: 03 December 2003 20:28
> To: mythtv-dev at mythtv.org
> Subject: Re: [mythtv] Sucess! mythtv no X-Window
> 
> 
> > I will be getting an ssh daemon running tonight or 
> tomorrow, I'll let 
> > you know what the CPU usage, etc is then.
> 
> Executive summary: 720x480 at 32bpp seems to be the best for 
> combination of CPU utilization and output quality. Anything 
> less than 1024x768 should be OK for CPU, but may not look 
> good on TV (underscanned).
> 
> For all these tests, video source is PVR-250 on remote 
> backend, 640x480 mpeg-ps at 3200kbps avg, 6400kbps max, audio is 
> layer 2 at 224kbps 48000 samples/s.
> 
> Hardware:
> EPIA-M9000
> 256MB DDR
> Output to TV set on S-Video
> Output to receiver on S/PDIF
> 
> Software:
> 2.4.23-pre7-epia2 - using cle266vgaio and viafb
> alsa-0.9.8 - using snd-via82xx
> NFS root filesystem
> DirectFB-0.9.20
> qt-embedded-free-3.2.3
> mythtv-0.12 with directfb patch
> 
> I set the framebuffer using:
> 
> insmod viafb TVon=1 TVoverscan=1 TVtype=1 refresh=60 bpp=$bpp 
> mode=$mode
> 
> 
> 640x480
> 16bpp: 50-60% CPU no jitter/stutter, bottom 1" of TV is underscanned
> 24bpp: 55-65% CPU same as 16bpp otherwise
> 32bpp: 50-65% CPU same as 16bpp otherwise (less CPU than 24bpp)
> 
> 720x480
> 16bpp: 55-65% CPU no jitter/stutter, full overscan (looks good)
> 24bpp: 60-70% CPU same as 16bpp otherwise
> 32bpp: 50-60% CPU same as 16bpp otherwise
> 
> 800x600
> 16bpp: 55-65% CPU no jitter/stutter, bottom 1" of TV is underscanned
> 24bpp: 55-70% CPU same as 16bpp otherwise
> 32bpp: 65-75% CPU same as 16bpp otherwise
> 
> 848x480
> 16bpp: 55-75% CPU no jitter/stutter, bottom 1" of TV is underscanned
> 24bpp: 55-65% CPU same as 16bpp otherwise
> 32bpp: 50-75% CPU (all over the place), some "tearing" during pans
> 
> 1024x768
> 16bpp: 65-80% CPU, occasional jitter/stutter, full overscan
> 24bpp: same as 16bpp
> 32bpp: same as 16bpp
> 
> From the tests above, it should be clear that 640x480 is 
> probably the best, but not if you want to display to TV. In 
> that case 720x480 at 32bpp offers the lowest CPU to have full 
> overscan. 720x480 also offers the benefit of not having to 
> scale DVDs for playback.
> 



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