Re: [Marvel-linux] g450 tv out? also, nupplevideo/mythtv on marvel?

[Petr V. <van...@vc...>]

On Fri, Aug 23, 2002 at 06:47:44PM -0500, Billy Biggs wrote:
> Petr Vandrovec (van...@vc...):
> 
> > Of course. G450/G550 hardware cannot do TV output from CRTC1. Maybe it
> > is possible to capture CRTC1 output through video-in, store it into
> > memory, and then display by using CRTC2, but as there is no
> > documentation for G450/G550 from Matrox, you know what...
> > 
> > So if you need text mode, or 8bpp TV out, choose different hardware.
> 
>   I meant my DVD player output to TV.  This would totally be fine on
> CRTC2: you can run it in Y'CbCr mode, YUY2 would be great, RGB32 would
> kick for other applications.  Still, you can't put it in interlaced
> modes or put it in Y'CbCr mode or get the VBI signals or anything,
> therefore it's useless.  That was my point.

On G450/G550 you must run CRTC2 in interlaced mode, you'll not get
picture otherwise ;-) While G400's MAVEN contained downscaling code
which converted picture down from (up to) 1280x1024 to
800x625, now it is your bussiness to program CRTC to just 625 (525)
lines, interlaced, 50 (60) Hz. Only thing G450/G550 is willing to
do in hardware is RGB->YCbCr conversion.

And there is no way to generate VBI. Maybe you could program pixel
clock as VBI clocks and output black/white pixels, but because of
I do not have any other TV signal analysator besides Bt848, I never
tried that. 
					Petr Vandrovec