Re: How to Capture in real time

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Javier Castellar (javier++at++sixty.asd.sgi.com)
Sun, 6 Apr 1997 19:18:20 -0700

Use the command /usr/gfx/ircombine (as root). With his user interface you will
be able to define the area of scan conversion to NTSC/PAL. The device in charge
is named as "encoder". You can either select either subset of the frame buffer,
one one of the high resolution channels for video output.

While using the encoder you will be unable to use the second high resolution
channel since they share the same XMAP chip. You can grab the area (grab with
the mouse the blue border) slightly bigger that video resolution in the
vertical axe in order to achieve a very nice flicker free signal.

If the map is 1:1 lines you might suffer flicker, this is not a bug, it is
life. Any horizontal line on interlaced video creates a flicker of 30hz/25hz
that can be prevented by using a scanning down.

Also keep in mind that there is difference between 60hz and NTSC/PAL ,
therefore to obtain better results you might genlock the high resolution pipe
with an NTSC/PAL signal (also to sync the VTR) but this is fine tunning that
some times is unneed.

ircombine has a very complete insight manual.

-Javier

On Apr 6, 3:56pm, Kian wrote:
> Subject: How to Capture in real time
> Hello.
> How do I capture simulation from my IR screen and output it directly
> onto a VCR? I need to show some visitors my work. But I cannot find
> any commands to output my screen in real time directly onto a VCR.
> I'm using IR with 2 processors and IRIX 6.2. On the RE, I know I
> could use vout which worked very well. But now, with this IR,
> it just cannot work! There is no vout command.
>
> Could someone help pls!
>
> Many thanx!
> Kian
> nkb++at++pacific.net.sg
>
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>-- End of excerpt from Kian

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