- h323plus - lists.packetizer.com

OpenMCU Virtual Machine working out-of-the-box
by Pablo Sotomayor 01 Apr '12

01 Apr '12

I downloaded this virtual machine from the russian openmcu fork (http://openmcu.ru) and got surprised with the results. I sucessfully tested video-conference features with Ekiga and NetMeeting software clients. Can anyone test this with real endpoint cameras ? The zip file with the virtual machine is availble on this torrent. http://openmcu.ru/public/OpenMCU%5brutracker%5d.torrent Pablo

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H323plus - no audio is being transmitted
by J.C Mercier 29 Mar '12

29 Mar '12

Hi Simon and all, I've noticed a recent with the latest trunk of H323plus that i'm not able to transmit any sound using the simpleplus application that comes with it. Wen i make calls to or receive calls from myphone2 or the lite version of spranto, I can hear incoming audio but the simpleplus doesn't seem to be transmitting any sound regardless of which machine i've tried on (All windows 7 / Vista). I tried debugging a little to determine the cause but so far no luck. I've also had issues compiling the code due to unresolved external errors coming from the h460p.cxx but have not really looked much into it and for it to work I had to disable H323_H460P. Your help would be greatly appreciated. Josh

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Compilation problems.
by Francisco Olarte (M) 28 Mar '12

28 Mar '12

When we compile and install OpenH233 (1.24 or HEAD) with an installed version of PTLIB (2.10.1) both installed local on a user home dir we end with the following directory structure: $ ls -l ~/include total 48 drwxr-xr-x 9 gay gay 4096 Mar 26 16:55 openh323 -r--r--r-- 1 gay gay 21475 Feb 29 09:57 ptbuildopts.h drwxr-xr-x 2 gay gay 4096 Feb 29 09:57 ptclib drwxr-xr-x 3 gay gay 4096 Feb 29 09:57 ptlib -r--r--r-- 1 gay gay 4794 Feb 29 09:57 ptlib.h drwxr-xr-x 2 gay gay 4096 Mar 26 17:02 yate When we compila yate, which uses openh323, it includes openh323buildopts.h, which it finds in ~/include/openh323/openh323buildopts.h This file, in stock form, starts with: #ifndef _OPENH323_BUILDOPTS_H #define _OPENH323_BUILDOPTS_H #include <ptbuildopts.h> #include <ptlib/../../revision.h> #if PTLIB_MAJOR == 2 && PTLIB_MINOR < 10 #define PTLIB_VER ( PTLIB_MAJOR*100 + PTLIB_MINOR*10 + PTLIB_BUILD ) #else #define PTLIB_VER ( PTLIB_MAJOR*1000 + PTLIB_MINOR*10 + PTLIB_BUILD ) #endif #define PTLIB_SVN_REVISION SVN_REVISION which has two problems, the first one is the " #include <ptlib/../../revision.h> " which does not work ( it would resolve to ~/include/ptlib/../../revision.h => ~/revision.h ). It works when compiling against the uninstalled version of ptlib because it has a file ~/src/ptlib-2.10.1/revision.h ( we unpack in ~/src ). We solve the problem by zapping the offending include. The second, minor problem, is the "#define PTLIB_SVN_REVISION SVN_REVISION" which fails when zapping the include, we zap this too and it works. I think BOTH lines should be deleted, they seem like some kind of testing stuff. If we do it after installing every h323plus code we compile builds without any problem. Francisco Olarte.

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Re: [h323plus] H323-SIP Gateway with H264 Support
by Diego Carvalho 26 Mar '12

26 Mar '12

Hi Simon, thanks for answering again. I'm really interested in being able to add H.264 in the capability set without having to link the library with FFMPEG/X264, but I couldn't understand what you explained. I searched on the internet and found this: http://www.voxgratia.org/docs/codec_plugins.html that I believe is related to what you explained but even with this page I couldn't realize what I have to do. Is it possible to configure the plugin that comes with the source in this way? I mean, use the plugin in h323plus/plugin/video/H.264 for only signaling, without have to link with FFMPEG/X264. Another question is again about the capabilities. You said that I can remove the capabilities that aren't supported by the SIP endpoint. But this way, I will have to add all possible capabilities to my gateway and them remove the ones that SIP doesn't support. It would be much easier if my gateway could start without any capabilities and then I add the ones that SIP supports. Is that possible? If not, I will have to do what you explained but when I will add all the capabilities again to be ready to handle the next call? Again, thanks for all the help. 2012/3/23 Simon Horne <s.horne(a)packetizer.com> > Diego**** > > ** ** > > There is some issues with changes in FFMPEG v54 and a number of function > names changed and others were depreciated recommend v52. I am currently > working through issues with v54. Again X264 is a moving target but last I > looked it compiled on Linux. On Windows is a whole different story > unfortunately.**** > > ** ** > > If you are only using the codec for signaling there should be no need to > link to either FFMPEG or X264 and you can gut the plugins and only define > the PluginCodec_Definitions, Plugin_Codec_Implementation() and > PLUGIN_CODEC_GET_CODEC_FN. These are the signaling parts of the codec. The > Encoder/Decoder contexts can be removed. There is some changes in the CVS > to also allow you to load these plugins statically see the > openh323buildopt.h.in.**** > > ** ** > > To filter capabilities on a call by call basis you can do this by > overriding H323Capabilities::OnSetLocalCapabilities() and use the > localCapabilities.Remove() function to remove the capabilities not used on > the SIP side.**** > > ** ** > > Simon**** > > ** ** > > *From:* h323plus-bounces(a)lists.packetizer.com [mailto: > h323plus-bounces(a)lists.packetizer.com] *On Behalf Of *Diego Carvalho > *Sent:* 23 March 2012 22:44 > *To:* h323plus(a)lists.packetizer.com > > *Subject:* Re: [h323plus] H323-SIP Gateway with H264 Support**** > > ** ** > > Hi Simon and "chr_cb". First of all, thanks for your help. Today I was > able to establish an audio only call between H323 and SIP using the gateway > I'm developing. This is great but I still have some problems and I > appreciate any help on this: > 1) Like I said, it was an audio only call. I was able to compile the > plugins with the packages from Ubuntu repositories (libx264-dev, > libavcodec-dev and libavutil-dev) but my project also uses ffmpeg and x264 > so I would like to compile with the latest source code from git we use. The > config.log shows some errors and on the internet I saw somebody saying that > only a specific version of ffmpeg allows the compilation. Is that true? If > so, what would be the version of ffmpeg and x264 I should use? Again, I > would like to reiterate that I only want to have H264 on my capabilities > list (I don't want to capture/render video). Do I indeed need the plugin? > Is there another way? > 2) If I set the gateway capabilities in the beginning it works but I want > so set them in a later time. Specifically, I receive the call and send an > invite on hold to SIP. Then it will answer with 200 OK with SDP. In this > moment, when I have the SIP SDP, I want to set the gateway capabilities > based on what the SIP side supports. How can I do this? If I try to add in > this moment it simply doesn't add them. > Thanks in advance.**** > > 2012/3/13 Simon Horne <s.horne(a)packetizer.com>**** > > Diego > > The plugins load default capability instances into the H323Endpoint. > When the H323Connection is created these capabilities are cloned > In H323Connection::OnSetLocalCapabilities() > Simply remove the unmatched capabilities > localCapabilities.Remove("H.264*"); > > The H323_ExternalRTPChannel does not handle RTP but can be used to not use > the internal RTP system. You can have your own external RTP stack or not > have one at all. > You needed to read and populate H245_H2250LogicalChannelParameters in the > send and receive message of the class with those of the SIP Client. > > I do have serious doubts what you are planning will work not because it > can't technically work but because of the differences in H.323 and SIP with > Video. H.323 is very strict on rules while SIP is very loose on > interpretations. > Here are the problems > 1. RTP packetization H.323 says strictly single NAL SIP is undefined 2 > options (Single NAL/Fragmented units) . You will get video on the H.323 > side > just fine but your SIP side with some devices may not be able to decode. > 2. Payload Type for H.264 is specified as being flexible but a lot of SIP > implementations have them fixed (usually 96 or 97) so H.323 requests 103 > SIP always ends 97 no video on the H.323 side. There is no way you can fix > this with signaling as SIP tells the other party what it is going to send > and H.323 tells the party what it wants to receive. You have to proxy the > media to fix the payload type number. > > Good luck. > > Simon > > > ============================================================================ > ============================================= > > From: Diego Carvalho [mailto:diego.cdomingos2010@gmail.com] > Sent: 14 March 2012 06:09 > To: Simon Horne > Subject: Re: [h323plus] H323-SIP Gateway with H264 Support**** > > > Hi Simon, thanks for answering but I still have some doubts: > You said that this plugin will add the capability automatically. Actually, > as I said, I'm building a H323-SIP gateway so, for instance, when the SIP > endpoint is making a call I want to add the H264 capability only if the SIP > endpoint offers it. Will I be able to add the capability manually? For > instance, using localCapabilities.Add(new H323_H264Capability()). To > sumarize, I want to be able to add (or remove if it was automatically added > and the current call does not offer it) manualy the H264 capability. > Also I don't know if the H323_ExternalRTPChannel applies to my situation. > It's used to pass the RTP to another device. I don't want to handle the RTP > at all (to be clear: I don't want RTP arriving on the gateway's network > card). I want to send to h323 the RTP address/port SIP offered and > vice-versa, so the RTP will flow directly between the endpoints. Any > thoughts? Thanks in advance. > 2012/3/13 Simon Horne <s.horne(a)packetizer.com> > Diego > > H.264 is a video plugin in the plugin/video directory. You will need X264 > and FFMPEG. For Ubuntu they are libx264-dev libavcodec-dev and > libavutil-dev. > > You build the plugin .so and the helper (in the gpl subdirectory) and place > them both in the same directory as you app. The application will load them > at startup and automatically add the capability to the capabilityset etc > > If you don’t want to use the plugin for RTP then have a look at the > H323_ExternalRTPChannel. This will bypass the RTP handling in the codec to > whatever you want. > http://www.voxgratia.org/docs/external_rtp.html > (its from 2004 but still current) > > Simon > > > From: h323plus-bounces(a)lists.packetizer.com > [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Diego Carvalho > Sent: 14 March 2012 03:05 > To: h323plus(a)lists.packetizer.com > Subject: [h323plus] H323-SIP Gateway with H264 Support > > Hi all, > I'm working on a h323-sip gateway with video (H264) support and I'm facing > some problems. I'm new with H323plus and with h323 protocol itself (I'm > learning as I go) so excuse me if I say something stupid. > First of all, I believe that the stack can be used to build a gateway but > it > seems that it's more focused on terminals. Am I right? So is it possible or > not to build a gateway using it? > Second, there is no native support for H264. The documentation shows the > class hierarchy. For audio we have, for instance, H323Cabability -> > H323RealTimeCapability -> H323AudioCapability -> H323_G711Cabability but we > don't have H323Cabability -> H323RealTimeCapability -> H323VideoCapability > -> H323_H264Cabability. I tried to create this one, extending from > H323Cabability -> H323RealTimeCapability -> H323VideoCapability -> > H323GenericVideoCabability and then I discovered that I would need to > override a function called CreateCodec to return a codec that handles the > video. But I don't want to handle the RTP media. I just want to put H264 in > the terminal capability set and establish a connection in a way that the > H323 and SIP terminals can exchange the media directly. I've heard about a > H264 plugin but it seems that it is for handling the media, so I don't know > if it fits my purpose. How can I achieve this? Is there any plan to support > H264 natively on H323plus? Also I need to get the remote RTP port. The only > way I found to do this is trough H323Connection::OnStartLocicalChannel but > this is called after a channel to handle the data is created and again, I > don't want to handle the RTP data. I appreciate any help. Thanks. > > **** > > ** ** >

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Re: [h323plus] H323-SIP Gateway with H264 Support
by Simon Horne 23 Mar '12

23 Mar '12

Diego The plugins load default capability instances into the H323Endpoint. When the H323Connection is created these capabilities are cloned In H323Connection::OnSetLocalCapabilities() Simply remove the unmatched capabilities localCapabilities.Remove("H.264*"); The H323_ExternalRTPChannel does not handle RTP but can be used to not use the internal RTP system. You can have your own external RTP stack or not have one at all. You needed to read and populate H245_H2250LogicalChannelParameters in the send and receive message of the class with those of the SIP Client. I do have serious doubts what you are planning will work not because it can't technically work but because of the differences in H.323 and SIP with Video. H.323 is very strict on rules while SIP is very loose on interpretations. Here are the problems 1. RTP packetization H.323 says strictly single NAL SIP is undefined 2 options (Single NAL/Fragmented units) . You will get video on the H.323 side just fine but your SIP side with some devices may not be able to decode. 2. Payload Type for H.264 is specified as being flexible but a lot of SIP implementations have them fixed (usually 96 or 97) so H.323 requests 103 SIP always ends 97 no video on the H.323 side. There is no way you can fix this with signaling as SIP tells the other party what it is going to send and H.323 tells the party what it wants to receive. You have to proxy the media to fix the payload type number. Good luck. Simon ============================================================================ ============================================= From: Diego Carvalho [mailto:diego.cdomingos2010@gmail.com] Sent: 14 March 2012 06:09 To: Simon Horne Subject: Re: [h323plus] H323-SIP Gateway with H264 Support Hi Simon, thanks for answering but I still have some doubts: You said that this plugin will add the capability automatically. Actually, as I said, I'm building a H323-SIP gateway so, for instance, when the SIP endpoint is making a call I want to add the H264 capability only if the SIP endpoint offers it. Will I be able to add the capability manually? For instance, using localCapabilities.Add(new H323_H264Capability()). To sumarize, I want to be able to add (or remove if it was automatically added and the current call does not offer it) manualy the H264 capability. Also I don't know if the H323_ExternalRTPChannel applies to my situation. It's used to pass the RTP to another device. I don't want to handle the RTP at all (to be clear: I don't want RTP arriving on the gateway's network card). I want to send to h323 the RTP address/port SIP offered and vice-versa, so the RTP will flow directly between the endpoints. Any thoughts? Thanks in advance. 2012/3/13 Simon Horne <s.horne(a)packetizer.com> Diego H.264 is a video plugin in the plugin/video directory. You will need X264 and FFMPEG. For Ubuntu they are libx264-dev libavcodec-dev and libavutil-dev. You build the plugin .so and the helper (in the gpl subdirectory) and place them both in the same directory as you app. The application will load them at startup and automatically add the capability to the capabilityset etc If you dont want to use the plugin for RTP then have a look at the H323_ExternalRTPChannel. This will bypass the RTP handling in the codec to whatever you want. http://www.voxgratia.org/docs/external_rtp.html (its from 2004 but still current) Simon From: h323plus-bounces(a)lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Diego Carvalho Sent: 14 March 2012 03:05 To: h323plus(a)lists.packetizer.com Subject: [h323plus] H323-SIP Gateway with H264 Support Hi all, I'm working on a h323-sip gateway with video (H264) support and I'm facing some problems. I'm new with H323plus and with h323 protocol itself (I'm learning as I go) so excuse me if I say something stupid. First of all, I believe that the stack can be used to build a gateway but it seems that it's more focused on terminals. Am I right? So is it possible or not to build a gateway using it? Second, there is no native support for H264. The documentation shows the class hierarchy. For audio we have, for instance, H323Cabability -> H323RealTimeCapability -> H323AudioCapability -> H323_G711Cabability but we don't have H323Cabability -> H323RealTimeCapability -> H323VideoCapability -> H323_H264Cabability. I tried to create this one, extending from H323Cabability -> H323RealTimeCapability -> H323VideoCapability -> H323GenericVideoCabability and then I discovered that I would need to override a function called CreateCodec to return a codec that handles the video. But I don't want to handle the RTP media. I just want to put H264 in the terminal capability set and establish a connection in a way that the H323 and SIP terminals can exchange the media directly. I've heard about a H264 plugin but it seems that it is for handling the media, so I don't know if it fits my purpose. How can I achieve this? Is there any plan to support H264 natively on H323plus? Also I need to get the remote RTP port. The only way I found to do this is trough H323Connection::OnStartLocicalChannel but this is called after a channel to handle the data is created and again, I don't want to handle the RTP data. I appreciate any help. Thanks.

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Compile H264
by Talita Ferraz Roberti 15 Mar '12

15 Mar '12

Hi all, I'm new on h323plus. First of all I need to compile H323plus with the H264 plugin. I searched a document or any tutorial on how to do it, but didn't find any. Can anyone help me, please? Is there any documentation on how to compile H323 in general? Thank you! Talita

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H323-SIP Gateway with H264 Support
by Diego Carvalho 14 Mar '12

14 Mar '12

Hi all, I'm working on a h323-sip gateway with video (H264) support and I'm facing some problems. I'm new with H323plus and with h323 protocol itself (I'm learning as I go) so excuse me if I say something stupid. First of all, I believe that the stack can be used to build a gateway but it seems that it's more focused on terminals. Am I right? So is it possible or not to build a gateway using it? Second, there is no native support for H264. The documentation shows the class hierarchy. For audio we have, for instance, H323Cabability -> H323RealTimeCapability -> H323AudioCapability -> H323_G711Cabability but we don't have H323Cabability -> H323RealTimeCapability -> H323VideoCapability -> H323_H264Cabability. I tried to create this one, extending from H323Cabability -> H323RealTimeCapability -> H323VideoCapability -> H323GenericVideoCabability and then I discovered that I would need to override a function called CreateCodec to return a codec that handles the video. But I don't want to handle the RTP media. I just want to put H264 in the terminal capability set and establish a connection in a way that the H323 and SIP terminals can exchange the media directly. I've heard about a H264 plugin but it seems that it is for handling the media, so I don't know if it fits my purpose. How can I achieve this? Is there any plan to support H264 natively on H323plus? Also I need to get the remote RTP port. The only way I found to do this is trough H323Connection::OnStartLocicalChannel but this is called after a channel to handle the data is created and again, I don't want to handle the RTP data. I appreciate any help. Thanks.

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NAT /Firewall Document
by Simon Horne 12 Mar '12

12 Mar '12

Guys Apologies for cross posting Over the last couple of months Jan and I have been committing a lot of H.460 NAT support into H323plus and GnuGk . H.460.18/.19, Multiplexing, Traversal Zones and H.460.23/.24/.24A/.24B and just recently H.460.17. I have written with Jan's assistance an ordinary person guide to NAT, the types of NAT and the logic behind H.323 NAT Traversal solutions. It briefly explains exactly what all these standards mean and how they fit together to provide a complete NAT Traversal solution. h323_nat_fw_solution.pdf <http://hive.packetizer.com/users/h323forum/specifications/h323_nat_fw_solut ion.pdf> Simon

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Minor issues with upnp
by J.C Mercier 05 Feb '12

05 Feb '12

Hi all, If i may first note, I've compiled the latest h323plus with no problem, but when i go to compile the simpleplus program, it gives an unresolved error for H46019UDPSocket::GetPeerAddress(...). This happens because H323_H46024A and H323_H46024B are disabled and GetPeerAddress is defined within H323_H46024A but declared within H323_H46019M. I did a minor work around and it now compiles fine. Another issue I came upon, when I initialize UPNP during the h323 initialization, during the UPnPThread::TestMapping() function call, it manages to map both ports (11000 and 11001) but after calling RemoveMap(extPort,true); and RemoveMap(extPort+1,true), only 11001 is removed and not 11000. I tested this with different port range and it produces the same results (one unmapped and not the other). Is this supposed to be the case or is something wrong somewhere? Although, after closing the program, both ports are unmapped successfully. But another problem that happens every time I close the program is a memory access violation at; ~IxNATNumberOfEntriesCallback() { delete m_pointer; } from interface IxNATNumberOfEntriesCallback : public INATNumberOfEntriesCallback Any reason why this could be the case? Lastly, when upnp is initialized, making a call doesn't seem to open and map the ports at all. What else should be done aside from initializing upnp? Your help and suggestions will be greatly appreciated. Thanks Josh

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H323plus and ptlib 64 bits
by Y030052 Ng 03 Feb '12

03 Feb '12

Hello, Is it possible to compile H323plus and Ptlib in 64 bits under Windows 7 and Visual Studio 2010? Can someone guide me on this? Thank you. Best regards,Jess

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H.323 p2p media
by J.C Mercier 26 Dec '11

26 Dec '11

Hi all, Just curious to know if ICE NAT traversal metrology can also be implemented to help H.323, or is there any alternate approach as a work in progress for P2P media without requiring the use of a gatekeeper? Any info or other possibilities/approach will be greatly appreciated Thanks Josh

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Multiplexing support in H323plus
by J.C Mercier 14 Dec '11

14 Dec '11

Hi all, looking through the h323plus code, I noticed it supports multiplexing for H.460.19. Just a few questions; 1. Does H323plus also support RTP multiplexing without the need for h.460.19 (direct endpoint to endpoint)? 2. If it doesn't support endpoint to endpoint multiplexing, does limiting RTP ports to only a few ports such as 10 to 12 (i.e. 3000 - 3010) opened port always remain in that range or will this produce any side affects when making a lot of calls? 3. With multiplexing support for H.460.19, is it 2 ports; 1 bi-directional port for audio and 1 bi-directional port for video? is there a third port for RTCP (QoS)? 4. Is sending/receiving RTCP/QoS mandatory for H.323 systems? What affects are there if this is not enabled? Thanks for all your help Josh

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Rearranged Default Session IDs
by J.C Mercier 13 Dec '11

13 Dec '11

Hi all, Just wanted to confirm whether both DefaultDataSessionID and DefaultH224SessionID are to use the same value '3' as indicated in mediafmt.h as well as in rtp.h or is this a typo? enum { NonRTPSessionID = 0, FirstSessionID = 1, DefaultAudioSessionID = 1, DefaultVideoSessionID = 2, DefaultDataSessionID = 3, DefaultH224SessionID = 3, DefaultExtVideoSessionID = 4, DefaultFileSessionID = 5, LastSessionID = 5 }; Thanks Josh

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looking for h323plus T.120 sample application
by Ashwani Kumar 12 Dec '11

12 Dec '11

Hi All, Is there any "h323plus T.120" sample application available ? -- Regards. *Ashwani Kumar *

1 0

video plugins and ffmpeg
by Ben Dudley 08 Dec '11

08 Dec '11

Hello all, I'm trying to compile OpenAM and use the plugins from the plugins dir of h323plus. I've downloaded the latest ptlib, h323plus core and applications from http://www.h323plus.org/source/. I started with a virgin install of Ubuntu 10.04 and installed dependent libs as necessary. Which version of ffmpeg works best with the plugins? apt-get retrieves ffmpeg 0.5.1. everything compiles fine and when I point PWLIBPLUGINDIR to OPENH323DIR/plugins openam lists all the codecs I expect to see - including H263. However, when I connect my video endpoint to it the video is freezes on what appears to be the first frame. I've tried later versions of ffmpeg from ffmpeg.org and libav from libav.org (recompiling h323plus, the plugins and openam after each ffmpeg change) but then openam doesn't list H263 in its list of codecs - only H261. The configure script indicates libavcodec and h263 is available for every combination I've tried. So, what's the secret to building openam with the H263 codecs? What version of ffmpeg must I use? Any help is greatly appreciated! PS: my apologies for first accidentally sending this to open323gk-users. Thanks! -Ben

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H.323 video codec support
by J.C Mercier 05 Dec '11

05 Dec '11

Hi all, I just have a question to know if H.323 is capable of supporting additional codecs such as THEORA (based on VP3) or VP8? If so, is h323plus capable of supporting such implementations or does H.323 only restricts video codecs to the H.26x class? Your insight on how this can be accomplished or what the requirements are will be appreciated. Thanks Josh

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Removing H.263/H.264 Capabilities in OpenMCU
by Victor Zanozin 30 Nov '11

30 Nov '11

Hi guys, I'm getting stuck with OpenMCU loading, and only starting the H.261 codecs. It seems it can detect H.263/H.264, but removes them shortly after detection, and then only shows one set of codecs in the video section of the startup. Logs: 0:00.030 OpenMCU H323 Found capability: H.239 Capabilities <18> H.263{sw} <1> 0:00.030 OpenMCU H323 Removing capability: H.239 Capabilities <18> H.263{sw} <1> 0:00.030 OpenMCU H323 FindCapability: "H.239 Capabilities" 0:00.030 OpenMCU H323 FindCapability: "*-QCIF*" 0:00.030 OpenMCU H323 Found capability: H.261-QCIF{sw} <14> 0:00.030 OpenMCU H323 Removing capability: H.261-QCIF{sw} <14> 0:00.030 OpenMCU H323 FindCapability: "*-QCIF*" 0:00.030 OpenMCU H323 FindCapability: "*-SQCIF*" 0:00.030 OpenMCU H323 FindCapability: "H.261{sw}" 0:00.030 OpenMCU H323 Found capability: H.261{sw} <15> 0:00.030 OpenMCU H323 Removing capability: H.261{sw} <15> 0:00.030 OpenMCU H323 FindCapability: "H.261{sw}" 0:00.030 OpenMCU H323 FindCapability: "H.263{sw}" 0:00.030 OpenMCU H323 Found capability: H.263{sw} <16> 0:00.030 OpenMCU H323 Removing capability: H.263{sw} <16> 0:00.030 OpenMCU H323 FindCapability: "H.263{sw}" 0:00.030 OpenMCU H323 FindCapability: "H.264{sw}" 0:00.031 OpenMCU H323 Found capability: H.264{sw} <17> 0:00.031 OpenMCU H323 Removing capability: H.264{sw} <17> Codecs loaded: 1: H.261-CIF{sw} <13> I'm also seeing no split screen video - When new endpoints join, video on the first endpoint freezes, and the new endpoint is not displayed until either endpoint disconnects, then it switches back to whichever endpoint is still connected and video resumes. Can anyone help? Thanks! Victor

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Text messaging in H323plus
by J.C Mercier 29 Nov '11

29 Nov '11

Hi all, first of all, thank you very much for all your kind help and suggestions. I am working with the simple application that comes with H323plus and I was wondering if H323plus supports sending text messages without being in a call. I know with previous versions of h323 this was not possible unless you did some sort of work around. Thanks Josh

2 1

Negotiate /Renegotiate video channel during call
by J.C Mercier 26 Nov '11

26 Nov '11

Hi all, Does anyone know if it's possible in H323plus renegotiate for video channel during a call? For instance, let's say I started an audio only call and the remote party is sending either audio only or both audio and video, is there a way for me start sending my video as the call is already in progress? And also, if i'm in a video call (sending my video) and i want to switch to audio only by stopping video (my video transmission) while the call is in progress, how would go about doing that? If this is not supported, what approach is supported in H323plus? Thanks in advance for your help. Josh C.

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[FIX] SegFault with H323plus with PTLIB 2.10, 2.11 on windows at call end
by Simon Horne 25 Nov '11

25 Nov '11

An important fix has been committed to the ptlib SVN to fix a bug in windows where nonAutoDelete threads where autoDeleting causing strange segfault at the end of a call. If you are experiencing the issue please apply this patch. http://opalvoip.svn.sourceforge.net/viewvc/opalvoip/ptlib/trunk/src/ptlib/ms os/win32.cxx?r1=26095 <http://opalvoip.svn.sourceforge.net/viewvc/opalvoip/ptlib/trunk/src/ptlib/m sos/win32.cxx?r1=26095&r2=26698> &r2=26698 Thanks to Josh Mercier for debugging this and getting it fixed in ptlib. Simon

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OpenMCU not using video codecs
by Victor Zanozin 24 Nov '11

24 Nov '11

Hi everyone, I'm having a lot of trouble setting up an OpenMCU server on either FreeBSD/Ubuntu (Ubuntu preferred). On FreeBSD, after all the packages are installed I am seemingly limited to H.261 - The endpoints are capable of H.263/264, however I cannot get OpenMCU to use this codec. On Ubuntu (my preferred system) OpenMCU preferences report the use of the G711 audio codecs, but do not even use the H.261 video codecs. There is no video output to any of the endpoints. I think it might have to do with the codec installation on Ubuntu - How can I check if these are installed properly? When I try to configure the h323plus install, I get the following: =================== Plugin configuration ====================== prefix : /usr/local exec_prefix : ${prefix} libdir : ${exec_prefix}/lib Audio Codec plugin install dir : ${libdir}/opal-1.23.0/codecs/audio Video Codec plugin install prefix: ${libdir}/opal-1.23.0/codecs/video LID plugin install prefix : ${libdir}/opal-1.23.0/lid FAX plugin install prefix : ${libdir}/opal-1.23.0/fax GSM : yes (internal) gsm-amr : yes iLBC : yes (internal) Speex : yes (internal, version 1.1.11.1) LPC10 : yes G.726 : yes IMA_ADPCM : yes SBC : no H.261 : yes H.263 : no (ffmpeg version) H.263/H.263+ : no H.264 : no THEORA : yes MPEG4 Part 2 : no CELT : no SpanDSP FAX : no CAPI : no Quicknet xJACK support : no Voicetronics VPB support : yes OS Type : linux-gnu Machine Type : i686 If all settings are OK, type make and make install ======================================================== Level 5 debug logs show: 0:00.034 OpenMCU MCU Codecs (in preference order): Table: G.711-ALaw-64k <1> G.711-uLaw-64k <2> UserInput/hookflash <3> UserInput/basicString <4> UserInput/dtmf <5> UserInput/RFC2833 <6> UserInput/Navigation <7> UserInput/Softkey <8> UserInput/PointDevice <9> UserInput/Modal <10> Set: 0: 0: G.711-ALaw-64k <1> G.711-uLaw-64k <2> 1: 2: UserInput/hookflash <3> UserInput/basicString <4> UserInput/dtmf <5> UserInput/RFC2833 <6> UserInput/Navigation <7> UserInput/Softkey <8> UserInput/PointDevice <9> UserInput/Modal <10> There seem to be no video codecs being found or loaded... I'm running the latest version of everything from the h323plus.org site, OpenMCU 2.2.5-1, h323plus 1.23.0. I've added what I believe to be the video codec directories in the following locations (yes, it's a mess): /usr/local/lib/opal-1.23.0/plugins/video /usr/local/lib/opal-1.23.0/codecs/video /usr/local/lib/opal-1.23.0/codecs/video/video /usr/local/lib/opal-1.23.0/temp/plugins/video /usr/local/lib/opal-1.23.0/video /usr/lib/ptlib/plugins/video /usr/lib/ptlib/codecs/video /usr/lib/ptlib/video /usr/lib/ptlib-2.4.5/plugins/video The contents of these are: root@OpenMCU:/usr/lib/ptlib/codecs/video# ls common H.261-vic H.263-1998 H.263-ffmpeg H.264 I'm also seemingly missing the H.264 codec: configure: h264 support disabled due to disabled dependency HAVE_H264_DECODER checking enable H.264 support... no Can anyone shed some light on this? Thanks! Victor

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Re: [h323plus] OpenMCU not using video codecs
by Simon Horne 24 Nov '11

24 Nov '11

Sorry It should be avcore-dev So it should look like sudo apt-get install libavcodec-dev libavformat-dev libavcore-dev Thanks Simon From: Miller, Michael B [mailto:myk@illinois.edu] Sent: 25 November 2011 04:28 To: Simon Horne Subject: Re: [h323plus] OpenMCU not using video codecs Simon, In the H.263 instructions, you list libavcodec-dev twice. Is that correct? or is there a 3rd dependency? thanks, Michael Miller System Engineer NCSA 217 649 0747 "If you're clear in your vision and trust the people in your team with clear objectives, they will invariably do their best to achieve everything desired, and usually deliver everything you could have hoped for and even more." -Paul Debevec On Nov 24, 2011, at 12:14 PM, Simon Horne wrote: Victor Video codecs are plugins (external libraries) and H.263 and H.264 have dependencies that are required before they will build. H.261 No dependencies. Make sure your copy the plugin to the same directory (or subDir) as the executable or set the PTLIBPLUGINDIR environmental variable to point to where the *plugin.so resides. H.263 Dependency FFMPEG for debian based systems sudo apt-get install libavcodec-dev libavformat-dev libavcodec-dev Goto H.261 H.264 Dependency FFMPEG (decode) and X264 (encode) for debian based systems sudo apt-get install libx264-dev Goto H.263 Rerun ./configure and the codecs should then be available. Do a Make and the the *plugin.so should be in the h323plus/plugins directory. Copy them from there. H.264 also has a *helper.so file which needs to be copied as well. This *MUST* be in the same directory as the executable. It does not understand the PTLIBPLUGINDIR environmental variable. You should then be good to go. To debug the codecs set the environmental variable PTLIB_TRACE_CODECS=4 You should see in the console the initial tests to check that all the dependencies are found at startup. Simon From: h323plus-bounces(a)lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Victor Zanozin Sent: 24 November 2011 16:41 To: h323plus(a)lists.packetizer.com Subject: [h323plus] OpenMCU not using video codecs Hi everyone, I'm having a lot of trouble setting up an OpenMCU server on either FreeBSD/Ubuntu (Ubuntu preferred). On FreeBSD, after all the packages are installed I am seemingly limited to H.261 - The endpoints are capable of H.263/264, however I cannot get OpenMCU to use this codec. On Ubuntu (my preferred system) OpenMCU preferences report the use of the G711 audio codecs, but do not even use the H.261 video codecs. There is no video output to any of the endpoints. I think it might have to do with the codec installation on Ubuntu - How can I check if these are installed properly? When I try to configure the h323plus install, I get the following: =================== Plugin configuration ====================== prefix : /usr/local exec_prefix : ${prefix} libdir : ${exec_prefix}/lib Audio Codec plugin install dir : ${libdir}/opal-1.23.0/codecs/audio Video Codec plugin install prefix: ${libdir}/opal-1.23.0/codecs/video LID plugin install prefix : ${libdir}/opal-1.23.0/lid FAX plugin install prefix : ${libdir}/opal-1.23.0/fax GSM : yes (internal) gsm-amr : yes iLBC : yes (internal) Speex : yes (internal, version 1.1.11.1) LPC10 : yes G.726 : yes IMA_ADPCM : yes SBC : no H.261 : yes H.263 : no (ffmpeg version) H.263/H.263+ : no H.264 : no THEORA : yes MPEG4 Part 2 : no CELT : no SpanDSP FAX : no CAPI : no Quicknet xJACK support : no Voicetronics VPB support : yes OS Type : linux-gnu Machine Type : i686 If all settings are OK, type make and make install ======================================================== Level 5 debug logs show: 0:00.034 OpenMCU MCU Codecs (in preference order): Table: G.711-ALaw-64k <1> G.711-uLaw-64k <2> UserInput/hookflash <3> UserInput/basicString <4> UserInput/dtmf <5> UserInput/RFC2833 <6> UserInput/Navigation <7> UserInput/Softkey <8> UserInput/PointDevice <9> UserInput/Modal <10> Set: 0: 0: G.711-ALaw-64k <1> G.711-uLaw-64k <2> 1: 2: UserInput/hookflash <3> UserInput/basicString <4> UserInput/dtmf <5> UserInput/RFC2833 <6> UserInput/Navigation <7> UserInput/Softkey <8> UserInput/PointDevice <9> UserInput/Modal <10> There seem to be no video codecs being found or loaded. I'm running the latest version of everything from the h323plus.org site, OpenMCU 2.2.5-1, h323plus 1.23.0. I've added what I believe to be the video codec directories in the following locations (yes, it's a mess): /usr/local/lib/opal-1.23.0/plugins/video /usr/local/lib/opal-1.23.0/codecs/video /usr/local/lib/opal-1.23.0/codecs/video/video /usr/local/lib/opal-1.23.0/temp/plugins/video /usr/local/lib/opal-1.23.0/video /usr/lib/ptlib/plugins/video /usr/lib/ptlib/codecs/video /usr/lib/ptlib/video /usr/lib/ptlib-2.4.5/plugins/video The contents of these are: root@OpenMCU:/usr/lib/ptlib/codecs/video# ls common H.261-vic H.263-1998 H.263-ffmpeg H.264 I'm also seemingly missing the H.264 codec: configure: h264 support disabled due to disabled dependency HAVE_H264_DECODER checking enable H.264 support... no Can anyone shed some light on this? Thanks! Victor

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Re: [h323plus] Need help to run oh323tut application using ALSA
by Simon Horne 21 Nov '11

21 Nov '11

Abdul Moiz Sorry for the delay in replying. I have been travelling. In your derived OpenAudioChannel PBoolean H323EndPoint::OpenAudioChannel(H323Connection & connection,PBoolean isEncoding, unsigned bufferSize, H323AudioCodec & codec); The second parameter isEncoding specifies the direction of the channel (true = transmit, false=receive). This function is called once for each direction. To only transmit or receive then return false for the function for the direction you do not wish to open. Simon From: ABDUL MOIZ [mailto:abdulmoiz786@gmail.com] Sent: 17 November 2011 19:49 To: Simon Horne Subject: Re: [h323plus] Need help to run oh323tut application using ALSA Hi, Is it possible to enable opening of only one audio channel say for transmitting in caller application and only one audio channel for receving in listener application? In the present scenario, there are 2 audio channels being opened, one for transmitting and the other for receiving.Can I configure to open only one channel for transmitting/receiving? Regards Abdul Moiz On Fri, Nov 11, 2011 at 4:53 PM, Simon Horne <s.horne(a)packetizer.com> wrote: Try simple -h To bring up the switch list See "P-prefer:" So simple -ln -PH.263,G.711 Will make H.263 and G.711 default Simon From: ABDUL MOIZ [mailto:abdulmoiz786@gmail.com] Sent: 11 November 2011 17:15 To: Simon Horne Subject: Re: [h323plus] Need help to run oh323tut application using ALSA Hi, Can you please tell me how to change the default audio/video codecs in simph323 application. Thanks, Abdul Moiz On Thu, Nov 10, 2011 at 2:54 PM, Simon Horne <s.horne(a)packetizer.com> wrote: Apply this patch http://h323plus.cvs.sourceforge.net/viewvc/h323plus/h323plus/samples/simple/ main.cxx?r1=1.4 <http://h323plus.cvs.sourceforge.net/viewvc/h323plus/h323plus/samples/simple /main.cxx?r1=1.4&r2=1.5> &r2=1.5 Enable environmental variable PTLIB_TRACE_CODECS=4 When running simple you will be able see the directories it searches for the X264 helper. Simon From: h323plus-bounces(a)lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of ABDUL MOIZ Sent: 10 November 2011 17:07 To: h323plus(a)lists.packetizer.com; s.horne(a)packetizer.com Subject: Re: [h323plus] Need help to run oh323tut application using ALSA Hi, I have copied h26x_pwplugin.so and h264_video_pwplugin_helper files in my simph323 application directory and when I run the applications, after call establishment , the "listener" application is hanging up at the function ((PVideoInputDevice *)device)->GetDeviceCapabilities(deviceName,deviceDriver,&videoCaps) and the "caller" application is giving the error: H323> ERROR: H.264 plugin couldn't find GPL process executable: h264_video_pwplugin_helper and therefore video channel is not being opened. Can you please help me to solve the above problem. Regards Abdul Moiz On Thu, Nov 3, 2011 at 8:55 PM, Simon Horne <s.horne(a)packetizer.com> wrote: You build the plugin codecs in the plugin directory that is part of h323plus. Ie h323plus/plugins Look for h26x_ptplugin.so Simon From: ABDUL MOIZ [mailto:abdulmoiz786@gmail.com] Sent: 04 November 2011 00:05 To: Simon Horne Subject: Re: [h323plus] Need help to run oh323tut application using ALSA Hi, On Thu, Nov 3, 2011 at 5:51 PM, Simon Horne <s.horne(a)packetizer.com> wrote: You build the plugin codecs in the plugin directory. They are separate files. Look for *_ptplugin.so I have alsa and v4l2 plugin file names as alsa_pwplugin.so and v4l2_pwplugin.so respectively. I have copied the above plugin files into my application directory, but still video tranfers is not happening. Apply this patch http://h323plus.cvs.sourceforge.net/viewvc/h323plus/h323plus/samples/simple/ main.cxx?r1=1.4 <http://h323plus.cvs.sourceforge.net/viewvc/h323plus/h323plus/samples/simple /main.cxx?r1=1.4&r2=1.5> &r2=1.5 By applying above patch, the code is not being hanged up now.But still video transfer is not happening. After some debugging of code, I have found that the function SimpleH323EndPoint::OpenVideoChannel(...) is not being called. Thereby video channel is not being created and video transfer is not happening. So I want to know whether simph323 application (out of the box) does video transfers? (or) Do I need to add the videocodec interface in the code so that the above said function may be called? If so can you please send me the required code snippets. Thanks Simon From: ABDUL MOIZ [mailto:abdulmoiz786@gmail.com] Sent: 03 November 2011 19:54 To: Simon Horne Subject: Re: [h323plus] Need help to run oh323tut application using ALSA Hi, I have found that v4l2 plugin is already built.And I have used the variable PTLIBPLUGINDIR to point it to the directory containing plugin. But still, I am unable to get Video transfers. When I started debugging, I found that the simph323 application program flow is being hanged up at the function call PVideoInputDevice::GetDeviceCapabilities(devices[0],inputDriverName,&caps) in main.cxx file. Can you please help me in giving correct options while executing the application. or any other suggestions to get Video transfers Below are the options I am giving presently $ ./simph323 -l -n -u listener -i 192.1.4.1 -x 6000 -v V4L2 $ ./simph323 -n -u caller -i 192.1.4.2 -x 5000 -v V4L2 listener@192.1.4.1:6000 My system is X86 , running ubuntu 10.04 Regards, Abdul Moiz On Thu, Nov 3, 2011 at 12:41 PM, Simon Horne <s.horne(a)spranto.com> wrote: Video is enabled via plugins, Build the plugins and place them in the same directory as the application. You can also use the environmental variable PTLIBPLUGINDIR to point to the directory where the video/audio plugins are. Simon From: ABDUL MOIZ [mailto:abdulmoiz786@gmail.com] Sent: 03 November 2011 16:54 To: Simon Horne; h323plus(a)lists.packetizer.com Subject: Re: [h323plus] Need help to run oh323tut application using ALSA Hi, I am using simph323 application (i.e running two instances one as caller and the other as listener) and able to transfer only "Audio". Is it possible to transfer "Video" and "Data" also using simph323 application and if so how to give the command line options for the 2 instances (i.e caller and listener) Or else can anybody suggest me if there is any better application/example to transfer Audio,Video and Data simultaneously. Regards, Abdul Moiz On Wed, Nov 2, 2011 at 3:41 AM, Simon Horne <s.horne(a)packetizer.com> wrote: Abdul Moiz There are no specific ALSA examples. However there are a number of same applications contained in the Applications download from the website. Simon From: ABDUL MOIZ [mailto:abdulmoiz786@gmail.com] Sent: 01 November 2011 12:39 To: Simon Horne Subject: Re: [h323plus] Need help to run oh323tut application using ALSA Hi simon, Thanks for your response. I am a beginner in this field. I am looking for sample examples/applications which establishes H.323 call and tranfers video,audio and data across 2 systems. Can you please tell me where can I find the latest sample applications (for Video,Audio and Data) or the related information/document for development of such applications Regards, Abdul Moiz On Fri, Oct 28, 2011 at 8:34 PM, Simon Horne <s.horne(a)packetizer.com> wrote: Abdul Moiz Oh323tut is getting quite old but here are some tips to get and set the Audio Driver and Device Name Get the drivers PStringArray names = PSoundChannel::GetDriverNames(); Get the devices PString DefaultAudioDriver = names[0]; PStringArray playDevices = PSoundChannel::GetDeviceNames(DefaultAudioDriver,PSoundChannel::Player); PStringArray recDevices = PSoundChannel::GetDeviceNames(DefaultAudioDriver,PSoundChannel::Recorder); Enumerate the devices for (PINDEX i = 0; i < playDevices.GetSize(); i++) { cout << playDevices[i] << endl; } To set the driver call these functions PBoolean H323EndPoint::SetSoundChannelPlayDriver(const PString & name) PBoolean H323EndPoint::SetSoundChannelRecordDriver(const PString & name) To set the device call these functions PBoolean H323EndPoint::SetSoundChannelPlayDevice(const PString & name) PBoolean H323EndPoint::SetSoundChannelRecordDevice(const PString & name) Simon From: h323plus-bounces(a)lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of ABDUL MOIZ Sent: 28 October 2011 17:15 To: h323plus(a)lists.packetizer.com Subject: [h323plus] Need help to run oh323tut application using ALSA Hi, I have downloaded the source code of "h323plus core"(version:1.23.0) and "PTlib"(version:2.10.1) from the link: http://www.h323plus.org/source/ on my X86 Desktop system running ubuntu 10.04 I have followed the tutorial given at link http://toncar.cz/openh323/tut/index.html I am able to compile both the source codes without any problems. Then I have downloaded and compiled "oh323tut" (version 1.1-1) source code from the link below: http://toncar.cz/openh323/tut/files.html I have got simph323 installed on my system using $ sudo apt-get install simph323 Now when I try to run oh323tut application and simph323 application (in separete terminals) using the commands below: $ ./oh323tut -f audio.wav -n -u 320 $ simph323 -n -u 321 320@127.0.0.1:1820 I am getting the following problem: H323> Could not open sound device Default - Check permissions or full duplex capability. Can anybody please help to solve the above problem. Regards

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Need help to get latest version of ohphone application
by ABDUL MOIZ 16 Nov '11

16 Nov '11

Hi, Can anyone please send me the link to download latest version of ohphone application (which can be compiled with h323plus library) for Linux. Regards, Abdul Moiz

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Current stable version issues
by J C Mercier 15 Nov '11

15 Nov '11

Hi all, I have downloaded the current stable version of H323plus and ptlib on the H323plus website, as well as the trunk versions of both and I seem to be having a few problems with them. Having compiled them on both windows xp and windows 7 using visual studio 2008, both versions compiled with no errors. My problems are as follows; 1. After first compiling the stable versions, I tried compiling the simpleh323 example which also compiles fine but when making a video call (using the h.623 codec), both side seemed to be sending a green background. I traced this issue in ptlib - directshow.cxx PVideoInputDevice_DirectShow::PlatformOpen() ... And commented out mt.subtype = MEDIASUBTYPE_RGB24 this fixes that issue but I was wondering why it was used. 2. My second problem, when ending a video call between two simpleh323 endpoint, the called party crashes dues to an invalid memory access violation while trying to access the thread object in; transports.cxx function: H323Transport::CleanUpOnTermination(). this is the case for both the current stable as well as the trunk versions of H323plus, tested with ptlib from version 2.9 up to the current trunk version. The issue seems to go away when tested with ptlib v2.8.2 through 2.8.5 inclusively. I've tried tracing to see why the thread becomes invalid, I can't exactly figure out the cause but it seems the thread object may be automatically deleted at some point. 3. My last problem is with the trunk version of H333plus. It complies with no errors, but when compiling the provided sample, I receive a bunch of unresolved errors due to h460.17/18 etc. I have not thoroughly looked into this but disabling H323_H460 seems to solve this for now. All these tests were performed on windows xp as well as windows 7 using visual studio 2008 pro. Your help with these issues will be greatly appreciated. JC

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