[h323plus] How to Add Extended Video Capability for H.239

Simon Horne s.horne at packetizer.com
Fri Jan 11 04:29:28 EST 2008

I have not tested the H.263 plugin with widescreen HD although I have tested
it with 920x720 HD using a logitech 9000 webcam.

What version of the H.263 plugin are you using? Are you using the latest out
of the h323plus CVS and compiled it against H323plus? The reason I ask is
that the default H.263 plugin from Opal CVS has framesize restrictions which
will not permit any framesize other than a fixed set of framesizes (which
1280x720 is not one) and would immediately close the channel. I understand
they are resolving this with Opal. I have added a compiler directive #ifndef
h323pluslib to enable this check to be removed for h323plus.

I hope this helps


-----Original Message-----
From: h323plus-bounces at lists.packetizer.com
[mailto:h323plus-bounces at lists.packetizer.com]On Behalf Of Abhishek Rohilla
Sent: Wednesday, January 09, 2008 8:34 PM
To: h323plus at lists.packetizer.com
Subject: Re: [h323plus] How to Add Extended Video Capability for H.239

Hi Simon

I have put H239 work on hold till next release.

I have one more problem. I am trying to support 1280 x 720 size video
transmission but after call negotiations video channel is getting closed
from my side because of some reason. I am using H263 dynamic capability for
negotiating with DyLogic Mirial and have set width and heigth to 1280 and

I think H263 plugin must support all custom image sizes which are multiple
of 4. But the video channel is getting closed after getting opened once. I
have not been able to recognise the reason for it.

Please help.

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