Hi,
just a short question to the "knowing": with MH 1.3 Capture
Agent, are there any improvements on the problem of captures being
corrupted in case the resolution of the presentation source changes
without signal drop?
Details:
Corrupted being a vertically 4-6 times repeated unreadable
"resized" pattern of the presentation.
The question arises here since we did try the recommended scaler, but
this also has a limitation (e.g. won't accept VGA 100Hz, which
Epiphan itself would accept without problems), so we'd be happy if the
software/driver could match with this problem.
As far as I understood, the presentation stream gets resized to the
initially used resolution, in case there happens a resolution change
*with* signal drop. Would it be possible to check the presentation
stream e.g. once every 5 seconds it it's still on the assumed
resolution ? Just a guess.
Regards, Andreas
[email protected] schrieb am Tue, 25 Oct 2011 betreff "Re:...":
Hi,
the mentioned problem persists, even though we disconnect the signal and
reconnect during capture. Atm only with Macs; seems like they communicate
with the beamer a lot, and try various resolutions on connecting,
before staying with one.
The other thing that might have an influence is that we provide a 1024x768
fallback image other than the test pattern; maybe this causes the reconnect
procedure to fail?
The mentioned video should now be accessible for public, if you want to have
a look. Would be great if this issue could be resolved on softwareside.
Things like this dont happen on a Windows system, it seems.
Regards, Andreas
PS: and yes, we just ordered a video scaler for testing.
Ruediger Rolf schrieb am Wed, 5 Oct 2011 betreff "Re: [Matterhorn-users]...":
Hi Andreas,
I can not open the link that you send. But nevertheless I guess I know the
problem, and the reason is quite simple, because the confidence monitoring
is working now we had a chance find the conditions when this error happens:
You can not change the resolution of a computer already connected to the
Epiphan device. The device does not send an event if something like this
happens, so matterhorn can not react on this, and turn on scaling.
If something like this happens you can reconnect the VGA. In this case the
resolution is checked again.
If something like this might happen too frequently in your lectures: get a
vga-scaler that you place before the epiphan device.
Rüdiger
Am 05.10.2011 08:53, schrieb [email protected]:
Hi,
once more I need advice on how to handle a capture problem: when switching
between devices with delay in switching or quick resolution changes, we
*sometimes* get the effect, that the resulting capture is corrupted
afterwards.
Corrupted means: yes, the screen is captured, but mostly unreadable and
like 5 times repeated vertically.
Have a look at
http://matterhorntest.zserv.tuwien.ac.at/engage/ui/watch.html?id=35b051db-363f-4a0e-ac36-0474d371cfdf
to see what I mean (beginning with minute 8)
We use MH 1.2 on Ubuntu 10.10 and the recommended settings for the
Epiphan VGA2USB-device.
Any input to what is the cause and what can be done to improve the
situation welcome, as always.
Andreas
-----------------------
[email protected]
01/58801 DW 41523
mobil: 0664/60 588 4523
TU Wien
DVR-Nummer: 0005886
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--
________________________________________________
Rüdiger Rolf, M.A.
Universität Osnabrück - Zentrum virtUOS
Heger-Tor-Wall 12, 49069 Osnabrück
Telefon: (0541) 969-6511 - Fax: (0541) 969-16511
E-Mail: [email protected]
Internet: www.virtuos.uni-osnabrueck.de
-----------------------
[email protected]
01/58801 DW 41523
mobil: 0664/60 588 4523
TU Wien
DVR-Nummer: 0005886
-----------------------
-----------------------
[email protected]
01/58801 DW 41523
mobil: 0664/60 588 4523
TU Wien
DVR-Nummer: 0005886
-----------------------
_______________________________________________
Matterhorn-users mailing list
[email protected]
http://lists.opencastproject.org/mailman/listinfo/matterhorn-users
