Simon,

I read on a forum that Polycom uses the i263 codec library. It also said that it uses the YUY2( YUV422 ) color space model. I have been trying to convert the decoded YUV422 stream into the YUV420P stream via ptlib but I am having troubles with the YUY2toYUV420PSameSize function in vconvert.cxx crashing during the first execution. Do you have any thoughts on this?

----- Original Message ---- From: Simon Horne s.horne@packetizer.com To: Adrien Rudulier rudz04@yahoo.ca; h323plus@lists.packetizer.com Sent: Friday, July 4, 2008 6:12:23 PM Subject: RE: [h323plus] OpenMCU 4CIF Issues

Adrien

BitRate and FrameRate reversed in PacPhone? That a display issue. Well I better fix that. :-)

The issue is in the ffmpeg decoder library. From past discussions it a setting issue in the library however the person who found the issue never contributed it back to the project. A contribution to fix the issue from anyone would be very most welcomed.

Simon -----Original Message----- From: Adrien Rudulier [mailto:rudz04@yahoo.ca] Sent: Saturday, 5 July 2008 6:41 AM To: Simon Horne; h323plus@lists.packetizer.com Subject: Re: [h323plus] OpenMCU 4CIF Issues

Simon,

I tried using PacPhone v2.0.5 but I couldn't connect to openMCU. I also found that in the Video settings the bitrate and framerate configurations are reversed. Also, I am using an analog HD camera through a usb capture card that supports up to 4CIF but I could only transmit QCIF or VGA.

Do you think the error with PVX and OpenMCU is in the ffmpeg decoder, an un-expected header, or some other reason?

Adrien

----- Original Message ---- From: Simon Horne s.horne@packetizer.com To: Adrien Rudulier rudz04@yahoo.ca; h323plus@lists.packetizer.com Sent: Thursday, July 3, 2008 7:59:42 PM Subject: RE: [h323plus] OpenMCU 4CIF Issues

Adrien

There are known outstanding issues with h323plus H.263 and Polycom PVX and VS7000. If anyone can assist in resolving these issues, a contribution would be greatly appreciated.

You can try using PacPhone it supports 4CIF and is built off h323plus.

Simon -----Original Message----- From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com]On Behalf Of Adrien Rudulier Sent: Friday, 4 July 2008 6:36 AM To: h323plus@lists.packetizer.com Subject: [h323plus] OpenMCU 4CIF Issues

I am currently using the newest versions (as of July 2, 2008) of ptlib(2.3.0), h323plus(1.20.5) and openmcu(2.2.4) from cvs on Ubuntu 8.04. I installed the plugins correctly and openmcu runs fine. However when using two polycom pvx clients to connect to openmcu using H.263 at 4CIF for both transmitting and receiving, the video is blocky and very distorted. There is no packet loss, the bitrate is set to 1920 kbps and the frame rate is a constant 30 fps for both transmitting and receiving. I was wondering if the problem is with openmcu or the pvx clients. Has anyone successfully used 4CIF resolution to be clear and smooth? Also, I had to massage the h.263 plugin code to get 4CIF to work with openmcu. Any help would greatly be appreciated.

Adrien Rudulier

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