[h323plus] Adding H263 codec to openmcu

Michael Bondi mike at bridgeconference.co.za
Fri Jan 8 06:29:12 EST 2010

Thanks Prasad,

I try install ffmpeg 0.4.7 from 
http://www.voxgratia.org/bin/ffmpeg-0.4.7.tar.gz but I get the following:

voyage:~/ffmpeg-0.4.7# make
make -C libavcodec all
make[1]: Entering directory `/root/ffmpeg-0.4.7/libavcodec'
gcc -O3 -Wall -g -DHAVE_AV_CONFIG_H -I.. -D_FILE_OFFSET_BITS=64 
-D_LARGEFILE_SOURCE -D_GNU_SOURCE -c -o common.o common.c
In file included from avcodec.h:14,
                 from common.c:27:
common.h:65: error: array type has incomplete element type
common.h:69: error: array type has incomplete element type
make[1]: *** [common.o] Error 1
make[1]: Leaving directory `/root/ffmpeg-0.4.7/libavcodec'
make: *** [lib] Error 2

But I proceed and continue  to configure and make and make install the 
a/v pugins in the ~/h323plus/plugins directory.

I create a directory ~/codecs and copy both 
h263-ffmpeg_video_pwplugin.so and libavcodec.so (from the 
libavcodec-0.4.7-linux.bin.tar.gz file) into there. I rename 
libavcodec.so to avcodec

I set export P_T_LIBPLUGINDIR=~/codecs           (does this have to be 

I run openmcu and connect with Polycom PVX, and I see the video 
window!!  But the video has strange lines with pink and blue colours, 
but it is the video from the webcam!

I assume it may be because I do not have the ffmpeg 0.4.7 installed 

I will have a look at installing ffmpeg 0.4.7 direct from ffmpeg site.

So I am closer....

Thanks again for the help.


Prasad Mohire wrote:
> HI Michael,
> I guess you have compiled PTLIB and H323plus and OpenMCU correctly. 
> H323plus doesn't need ffmpeg. ffmpeg is needed by h323plus avplugin. 
> You were able to hear audio because h323plus comes with G711 codecs. 
> You will need to build H263 plugin separately.
> h263 plugin needs ffmpeg version 0.47. To install it:
>  run ./configure --enable-shared, then make and make install in ffmpeg 
> directory.
> Once that is done, download the plugins directory from h323plus.com 
> <http://h323plus.com>.
> untar the direcory under h323plus directory so that you will have 
> plugins directory under h323plus.
> Goto plugins directory.
> run ./configure
> You should see h263 : yes in output of configure script. This means it 
> will build H.263 plugin. If it is 'no' there is something wrong with 
> prerequisites i.e. ffmpeg. make sure that libavcodec.h file is in 
> include path.
> once you see H.263: yes as output, run make and make install in 
> plugins directory.
> create a directory to store the plugins. Set environment variable 
> PWLIBPLUGINDIR pointing to that directory. Copy 
> h323plus/plugins/video/h.263/h263-ffmpeg_video_pwplugin.so file to 
> $PWLIBPLUGINDIR. Copy libavcoded.so to $PWLIBPLUGINDIR  and rename it 
> to avcodec.
> Now start openmcu, it should load with H.263 capability.
> File "C:\\traces.txt" will be created in directory from which you will 
> start openmcu. You can see what all capabilities are added while 
> openmcu is started in that file.
> Thanks and Regards,
> Prasad.
> On Fri, Jan 8, 2010 at 3:32 PM, Michael Bondi 
> <mike at bridgeconference.co.za <mailto:mike at bridgeconference.co.za>> wrote:
>     Hi all and Happy 2010!
>     This may have been asked before, but I cannot help myself but to
>     ask again.
>     I have compiled ptlib 2.4.5 and h323plus 1.21 and openmcu 2.2.5 on
>     a Debian 5 machine.
>     I am able to connect and hear the tones and message for connecting
>     but am unable to get video on the screen.
>     I have tried compiling h323plus with only the 0.4.7 ffmpeg
>     libavcodec.so placed in a directory /root/codec and compiled with
>     ./configure --enable-rfc2190avcodec=/root/ffmpeg switch, all
>     compiles fine, but still no h.263 video. Is there any more I need
>     to do here?
>     Also, I am getting confused where to unpack and install the a/v
>     plugins from file
>     http://www.h323plus.org/source/download/plugins-v1_21_0.tar.gz
>     Thanks
>     Mike
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