Ashwani By enabling this before calling simple. export PTLIB_TRACE_CODECS=4 You should see this. h264pipe_unix.cxx(305) H264 IPC PP: Couldn't find GPL process executable in /usr/local/lib/codecs/video/h264_video_pwplugin_helper h264pipe_unix.cxx(305) H264 IPC PP: Couldn't find GPL process executable in /usr/lib/codecs/video/h264_video_pwplugin_helper h264pipe_unix.cxx(305) H264 IPC PP: Couldn't find GPL process executable in /usr/local/lib/codecs/video/h264_video_pwplugin_helper h264pipe_unix.cxx(309) H264 IPC PP: Found GPL process executable in ../codecs/video/h264_video_pwplugin_helper If you make install on the h323plus/plugins directory it should be detected. Just make sure it is in one of the above directories. Simon From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Ashwani Kumar Sent: 10 November 2011 19:58 To: Simon Horne Cc: h323plus@lists.packetizer.com Subject: Re: [h323plus] ERROR: H.264 plugin couldn't find GPL process executable: h264_video_pwplugin_helper Hi Simon, Thanks for your reply. I set environmental variable "PTLIB_TRACE_CODECS=4" and copied "h264_video_pwplugin_helper" in "samples/simple/obj_linux_x86" dir but still getting same error: ERROR: H.264 plugin couldn't find GPL process executable: h264_video_pwplugin_helper and also I am not able to see the directories the plugin searches for the X264 helper. Regards, Ashwani On Thu, Nov 10, 2011 at 3:13 PM, Simon Horne <s.horne@packetizer.com> wrote: Enable environmental variable PTLIB_TRACE_CODECS=4 When running simple you will be able see the directories the plugin searches for the X264 helper. The helper should be compiled with the x264 plugin. Simon From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Ashwani Kumar Sent: 10 November 2011 16:20 To: h323plus@lists.packetizer.com Subject: [h323plus] ERROR: H.264 plugin couldn't find GPL process executable: h264_video_pwplugin_helper Hi All, I have complied H323 plus on my x86 platform running ubuntu 10.04. When I am using simph323 application to make audio & video call, application getting hang. below is the last lines of log message: Receiving side: Waiting for incoming calls for "ashwani" Press X to exit. H323> ERROR: H.264 plugin couldn't find GPL process executable: h264_video_pwplugin_helper Incoming call from "caller [192.1.4.1]", answer call (Y/n)? Y Started logical channel: sending G.711-ALaw-64k <1> Started logical channel: receiving G.711-ALaw-64k <1> Sending side: Initiating call to "ashwani@192.1.4.1:6000" Press X to exit. H323> ERROR: H.264 plugin couldn't find GPL process executable: h264_video_pwplugin_helper "ashwani" did not answer your call please find pointer to solve the problem. Thanks in Advance Ashwani