Re: Framelocking on realityII and sirius ...

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Michael Jones (mtj++at++babar)
Wed, 4 Jan 1995 12:14:52 -0800

On Jan 3, 8:17pm, Cedric Gautier wrote:
> Subject: Framelocking on realityII and sirius ...
:
:Hello again ...
:
:I have tried different configurations of "setmon" command to framelock the
:graphic screen with the video but none of them seems to fill completely what
:I am waiting for ... the documentation about it as no entry for reality
:engine graphics in the online books ... does anyone know the right command
:to launch on RealityII/Sirius for framelocking in PAL ? ... At the time I
:will be sur of the software command I be able to check the hardware side
:carefully ! ...
:
:Thank's for any help ...
:
:Cedric
:
:I.N.A R&D email: gce++at++ina.fr
:
>-- End of excerpt from Cedric Gautier

Here's the answer from one of the RealityEngine video gurus. Hope
this helps. Michael.

The software command is setmon; setmon is the only way of changing the
VOF.

However, the issue is choosing the correct VOF. I'm guessing that what
you want is to framelock a 1280x1024 graphic screen to a PAL signal.
To do that, you must use one of the VOFs:

    1280x1024_25f.u
    1280x1024_50f.u

These will both give you a 50Hz 1280x1024 graphic display; the difference
is that one will swapbuffers at 25Hz, so that you can render frames to
the graphics, and the other will swapbuffer at 50Hz, so that you can
render fields.

You *cannot* framelock with a standard 1280x1024_50.u. Only VOFs that
have an `f' (for framelock) can do this. (All VOFs can, of course,
genlock).

So to framelock to PAL, you would say

    /usr/gfx/setmon -n -g 1280x1024_50f

To genlock, you would set the output format to PAL:

    /usr/gfx/setmon -n -g 770x576_25i

....paul

--
Paul Spencer                 Silicon Graphics Advanced Graphics Division
spencer++at++sgi.com                                Mountain View, California





-- 


Be seeing you,      Phone:415.390.1455  Fax:415.390.2658 M/S:8U-590
Michael T. Jones    Silicon Graphics, Advanced Graphics Division
mtj++at++sgi.com         2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311















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