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@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@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@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of ABDUL MOIZ Sent: 10 November 2011 17:07 To: h323plus@lists.packetizer.com; s.horne@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@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@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@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@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@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@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@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of ABDUL MOIZ Sent: 28 October 2011 17:15 To: h323plus@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