Sunday, December 1, 2019

Transcoding Using Kamailio and Rtpengine

Transcoding of audio and video codec is complex and costly it is fulfilled with the giant legacy telecom company. Please follow the below example if you want to transcode using opensource and free of cost.


Step 1 - Launch a VM with ubuntu 18.04

Step 2 - Login and Run below command
#apt update && apt-get install -y debhelper=12.1.1ubuntu1~ubuntu18.04.1 dh-autoreconf libmysqlclient-dev iptables-dev libavcodec-dev libavfilter-dev libavformat-dev libavutil-dev libcurl4-openssl-dev libevent-dev libglib2.0-dev libhiredis-dev libjson-glib-dev libpcap-dev libpcre3-dev libsystemd-dev libssl-dev libswresample-dev libxmlrpc-core-c3-dev markdown gperf libbencode-perl libdigest-crc-perl  libcrypt-openssl-rsa-perl       libcrypt-rijndael-perl  libdigest-hmac-perl libio-multiplex-perl  libio-socket-inet6-perl libnet-interface-perl libsocket6-perl default-libmysqlclient-dev libiptc-dev libspandsp-dev libhiredis-dev libjson-glib-dev libpcap0.8-dev libpcre3-dev libssl-dev libswresample-dev libsystemd-dev  git gcc g++ flex bison libmysqlclient-dev make autoconf libssl-dev libcurl4-openssl-dev libxml2-dev libpcre3-dev libxmlrpc-core-c3-dev zlib1g-dev fakeroot unzip redis-server init-system-helpers sngrep wget libconfig-tiny-perl dkms module-assistant nfs-common keyutils libnfsidmap2 libtirpc1 nfs-common rpcbind keyutils libnfsidmap2 libtirpc1 nfs-common rpcbind watchdog


Step 3 - Install Kamailio
#cd /usr/local/src && git clone --depth 1 --no-single-branch https://github.com/kamailio/kamailio kamailio
#cd kamailio && git checkout -b 5.3 origin/5.3
#make include_modules="db_mysql dialplan" cfg
#make PREFIX="/usr/local/kamailio-5.3" include_modules="db_mysql dialplan" cfg
#make all



Step 4: Install RTPEngine with G729 supports
#cd /usr/local/src && git clone https://github.com/sipwise/rtpengine.git
#cd rtpengine && git checkout mr8.2.1.1
#cd /usr/local/src  
VER=1.0.4 && curl   https://codeload.github.com/BelledonneCommunications/bcg729/tar.gz/$VER   >bcg729_$VER.orig.tar.gz
#tar zxf bcg729_$VER.orig.tar.gz && cd bcg729-$VER
#git clone https://github.com/ossobv/bcg729-deb.git debian
#dpkg-buildpackage -us -uc -sa
#cd ..
#dpkg -i libbcg729-0_1.0.4-0osso3+deb9_amd64.deb
#dpkg -i libbcg729-dev_1.0.4-0osso3+deb9_amd64.deb
#dpkg -i libbcg729-0-dbg_1.0.4-0osso3+deb9_amd64.deb
#cd rtpengine/
#dpkg-checkbuilddeps 
#dpkg-buildpackage -rfakeroot
#cd ..
#apt-get -f install && apt --fix-broken install
#dpkg -i ngcp-rtpengine-daemon_8.2.1.1+0~mr8.2.1.1_amd64.deb
#dpkg -i ngcp-rtpengine-iptables_8.2.1.1+0~mr8.2.1.1_amd64.deb
#dpkg -i ngcp-rtpengine-kernel-dkms_8.2.1.1+0~mr8.2.1.1_all.deb
#dpkg -i ngcp-rtpengine-kernel-source_8.2.1.1+0~mr8.2.1.1_all.deb
#dpkg -i ngcp-rtpengine-recording-daemon_8.2.1.1+0~mr8.2.1.1_amd64.deb
#dpkg --install ngcp-rtpengine-utils_8.2.1.1+0~mr8.2.1.1_all.deb
#dpkg -i ngcp-rtpengine_8.2.1.1+0~mr8.2.1.1_all.deb
#dpkg -i ngcp-rtpengine-kernel-source_8.2.1.1+0~mr8.2.1.1_all.deb
#dpkg -i ngcp-rtpengine-daemon-dbgsym_8.2.1.1+0~mr8.2.1.1_amd64.ddeb

# rtpengine --codecs
                PCMA: fully supported
                PCMU: fully supported
                G723: fully supported
                G722: fully supported
               QCELP: supported for decoding only
                G729: fully supported
               speex: fully supported
                 GSM: fully supported
                iLBC: not supported
                opus: fully supported
              vorbis: fully supported
                 ac3: fully supported
                eac3: fully supported
              ATRAC3: supported for decoding only
             ATRAC-X: supported for decoding only
                EVRC: supported for decoding only
               EVRC0: supported for decoding only
               EVRC1: supported for decoding only
                 AMR: supported for decoding only
              AMR-WB: supported for decoding only
           PCM-S16LE: fully supported
                 MP3: fully supported



Step 5: Modify Kamailio configuration
...if (is_method("INVITE")) {
  if (has_body("application/sdp")) {
    rtpengine_manage("codec-mask-all codec-transcode-PCMA");
...


For any support please contact us at support@pstncall.com. www.pstncall.com

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