[AG-TECH] VIC problems at 25fps
Steven
s.jack at compserv.gla.ac.uk
Tue Mar 16 11:39:43 CST 2004
I think so as you (as the receiver ) have no control over other peoples
windows dropping off.
Steven
-----Original Message-----
From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov] On Behalf
Of Ivan R. Judson
Sent: 15 March 2004 16:14
To: 'Christoph Willing'; 'Steven'
Cc: 'AG-TECH'; 'Michael Daw'; 'C.Cooper at compserv.gla.ac.uk'
Subject: RE: [AG-TECH] VIC problems at 25fps
Would it be a simple work around for us to change the default behavior to
24fps in the next release so that this is at least avoided?
--Ivan
> -----Original Message-----
> From: owner-ag-tech at mcs.anl.gov
> [mailto:owner-ag-tech at mcs.anl.gov] On Behalf Of Christoph Willing
> Sent: Sunday, March 14, 2004 7:16 PM
> To: Steven
> Cc: AG-TECH; 'Michael Daw'; 'C.Cooper at compserv.gla.ac.uk'
> Subject: Re: [AG-TECH] VIC problems at 25fps
>
> On Fri, 2004-03-12 at 21:54, Steven wrote:
> >
> >
> > Hello I have noticed a problem with vic on our machines here in the
> > UK. The problem is manifested in two ways.
> >
> > 1. The GUI for the vic window on the video machine is
> > unresponsive, i.e. it is difficult to access GUI
> buttons, etc
> > and the window often doesn?t redraw correctly.
> [snip]
> >
> > A quick fix is to set the 4 transmissions to 24 fps, but I
> wonder if
> > anyone else is suffering from the same problems or has any insights.
> >
> > This obviously will only affect those using PAL sources,
> though it may
> > be interesting for someone with an NTSC or indeed SECAM source to
> > comment when running at 25fps.
> >
>
> We've seen this here too for a long time. Our quick fix has
> also been to restrict the frame rate to 24fps (PAL input).
>
> Given the differing number of pixels in PAL & NTSC frames
> (therefore the bandwidth for a particular frame rate), the
> corresponding test on NTSC systems is whether they can do
> 30fps (not 25fps, as suggested above).
> Looking at the ANL Lobby right now, all video streams (I presume NTSC
> sources) are running at 25fps, not 30fps. NTSC capture at
> 25fps would be roughly equivalent to PAL capture at 20fps.
>
>
> chris
>
>
>
> --
> Chris Willing Telephone (61-2) 9351 3914
> Sydney Vislab, F09 Fax (61-2) 9351 5955
> University of Sydney
> NSW 2006 Australia http://www.vislab.usyd.edu.au
>
>
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