PJSIP (PJSUA2) - OPUS codec

Question

Is it possible to configure PJSIP (PJSUA2) to use OPUS codec?

Answer 1

I finally found a way (ubuntu 14.04, require PJSIP >= 2.5):

1. Install opus@1.1.2 from source using following commands:

   $ curl -sO http://downloads.xiph.org/releases/opus/opus-1.1.2.tar.gz
   $ tar xzvf opus-1.1.2.tar.gz \
     && rm opus-1.1.2.tar.gz \
     && cd opus-1.1.2 \
     && ./configure \
     && make && make check 
   
   $ sudo make install \
     && sudo ldconfig 
   
   $ ldconfig -p | grep opus
   > libopus.so (libc6,x86-64) => /usr/local/lib/libopus.so
   

2. Install PJSIP@2.5 according to http://trac.pjsip.org/repos/ticket/1904:

   curl -sO http://www.pjsip.org/release/2.5/pjproject-2.5.tar.bz2
   tar xjf pjproject-2.5.tar.bz2 \
    && rm pjproject-2.5.tar.bz2 \
    && cd pjproject-2.5/ \
    && ./configure --prefix=/usr --enable-shared --with-opus=/usr/local/ \
    && make dep && make
   
   $ sudo make install && sudo ldconfig
   

3. Make sure OPUS is available

   std::cout << "Available codecs:\n";
   for (auto c : Endpoint::instance()->codecEnum()) {
     std::cout << " - " << c->codecId << " (priority: " << static_cast<int>(c->priority) << ")\n";
   }
   

Available codecs:

• speex/16000/1 (priority: 130)
• speex/8000/1 (priority: 129)
• speex/32000/1 (priority: 128)
• iLBC/8000/1 (priority: 128)
• GSM/8000/1 (priority: 128)
• PCMU/8000/1 (priority: 128)
• PCMA/8000/1 (priority: 128)
• G722/16000/1 (priority: 128)
• opus/48000/2 (priority: 128)
• L16/44100/1 (priority: 0)
• L16/44100/2 (priority: 0)
• L16/8000/1 (priority: 0)
• L16/8000/2 (priority: 0)
• L16/16000/1 (priority: 0)
• L16/16000/2 (priority: 0)

4. Adjust priority using Endpoint::instance()->codecSetPriority("opus/48000", 131);