Hi<br>




<br>




I




have build a mpeg4 plugin dll which is able to load generic Video




Capabilities for mpeg4 codec. I am trying to connect with Salyens VoIP.<br>




The problem is that in <br>




<br>




H323GenericCapabilityInfo::OnReceivedGenericPDU(OpalMediaFormat & mediaFormat,<br>




&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; const H245_GenericCapability & pdu,<br>




&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; H323Capability::CommandType type)<br>




<br>




the very first check<br>




<br>




if (pdu.m_capabilityIdentifier != *identifier)<br>




&nbsp;&nbsp;&nbsp; return FALSE;<br>




<br>




returns FALSE and hence the capability is not negotiated.<br>




I think I have missed some parameter while defining mpeg4 codec definition.<br>




<br>




MPEG4 plugin requires <font face="Verdana" size="2"><i>h323CapabilityData </i></font>also. I have defined capability data as follows<br>




<br>




<br>




static const struct PluginCodec_H323GenericParameterDefinition mpeg4_h323params[] = <br>




{ <br>




&nbsp;&nbsp;&nbsp;




{1,42,




PluginCodec_H323GenericParameterDefinition::PluginCodec_GenericParameter_unsignedMin,{145}},&nbsp;&nbsp;




// taken from H264 plugin file<br>




&nbsp;&nbsp;&nbsp; NULL <br>




}; <br>




<br>




static const struct PluginCodec_H323GenericCodecData mpegcap =<br>




{<br>




&nbsp; OpalPluginCodec_Identifer_MPEG4,&nbsp; // capability identifier (Ref: Table I.1 in H.245)<br>




&nbsp; 3000000,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // Must always be this regardless of "Max Bit Rate" option<br>




&nbsp; sizeof(mpeg4_h323params),<br>




&nbsp; mpeg4_h323params<br>




};<br>




<br>




The <font face="Verdana" size="2"><i>h323CapabilityData points to mpegcap in PluginCodec_Definition.<br>I am doubtful about </i></font>H323GenericParameterDefinition, Can someone please help me with it.<br>




<br>




Thanks<br><br>




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