New subject: Need help to run oh323tut application using ALSA

10 Nov 2011

      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/...

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****

Re: [h323plus] Need help to run oh323tut application using ALSA

ABDUL MOIZ

Simon Horne

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