[h323plus] Optmized version os libs

Simon Horne s.horne at packetizer.com
Fri Feb 15 12:14:59 EST 2008


To set being about to send 4CIF you use the command
Note this a maximum value so you still will be able to receive CIF or QCIF.

Sizes above CIF use a generic plugin codec definition and this command sets the parameters of that generic codec to a maximum size of 4CIF.

You will need to use the H323plus CVS as it does not work in v1.20.2. (needs patch in h323pluginmgr.cxx)

Of course you will need to alter your OpenMCU video mixer code etc to handle 4CIF.

Just to note H323plus also supports extendedVideo capability (see H.239 code) which also allows you to create a generic capability with the ability to use multiple Video Inputs. :-)

  -----Original Message-----
  From: h323plus-bounces at lists.packetizer.com [mailto:h323plus-bounces at lists.packetizer.com]On Behalf Of Marcos Fábio Jardini
  Sent: Friday, February 15, 2008 9:40 PM
  To: h323plus at lists.packetizer.com
  Subject: Re: [h323plus] Optmized version os libs

  Thanks Simon, actualy we are developing with PWLib 1.10.3 and OpenH323 1.18.0. I already played arround PVideoOutputDevice, injecting the incoming video (converted to BGR) to an Java BufferedImage Data Buffer directly and re-split the video of participants in separate panels (in the tests we have realtime response). Now I'm trying to move the project from the old versions to the H323+ new versions (a very good job, I need no more that's hacks to compile in Windows :)

  About the H.263 codec, there some app to see an exemple of how set the H263 Capability and set it 4CIF?
  We're successfully using the ffmpeg H.263 plugin in linux and windows in a modified version o OpenMCU 2.2.0. But just I'm moving the old libs no this new project I'm a little stuck with H263 Capability and 4CIF.

  Thanks again.

  2008/2/14, Simon Horne <s.horne at packetizer.com>:

    All video codecs in h323plus are plugin. Seperate files which are read in at startup with your application. These plugins are just generic c/c++ code which do not need linking to the main h323plus library. There are plugins for H.261,H.263 and a H.264 under testing. The H.263 and H.264 plugins use the FFMPEG library however having the AMD option would be good. The best place to start would be to look at the H.263 plugin which is available with the A/V plugins (Linux) from the H323plus website. Knowledge of the interworkings of h323plus is not needed although you may need assistance with how the plugins are linked in and used in the library.

    If you need further assistance please let me know.


     -----Original Message-----
    From: h323plus-bounces at lists.packetizer.com [mailto:h323plus-bounces at lists.packetizer.com]On Behalf Of Marcos Fábio Jardini
    Sent: Friday, February 15, 2008 4:56 AM
    To: h323plus at lists.packetizer.com
    Subject: [h323plus] Optmized version os libs

      To not spend work in reinventing the wheel I want to know if there are people working in the codecs and PColourConverter classes using the AMD Performance Library.

      AMD is providing the APL lib in Linux, Windows and Solaris flavours, and they version of GNU GCC 4 for RH and SuSe.

      I'm woking in a project for use in internet2, so I'll 'spend' some time in create of a RAW YVU420 codec, but reading the APL manuals they provide suport for H.264 :). If some have interest or already in the same effort....

      If someone already have a RAW codec or already using the APL please can share some hints on sourceforge forums of this project, I'll be pleased.

      Other question I have is how to add the H.263 video capability in H323Plus, I'm new to the H.323 and openH323 implementation and I am a bit lost with the modifications in H323plus.

      When the work is done I'll ask to put the code or the link it to the internet (it's a project sponsored by the government for a public university so, I think I'll have no problems in sharing the codes produced/modified)


  Jogue RPG, alimente o lado criativo! 
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