Dobrý den, Where can I get the -extra package for libav? I try from here https://freeswitch.org/stash/projects/SD/repos/libav/browse It is compiled without problems. But I still have a error 2015-05-26 06:01:38.083643 [CRIT] switch_loadable_module.c:1520 Error Loading module /usr/local/freeswitch/mod/mod_av.so **libvpx.so.1: cannot open shared object file: No such file or directory** -- S pozdravem, Ing.Denis Jakovlev mob.tel. 775-415-382 úterý 26. května 2015, 11:22:35, napsal jste: try using mod av instead. You'll need to install the -extra package for libav On Tuesday, May 26, 2015, Denis Jakovlev <yadenis@seznam.cz> wrote: Hi all ! I have one problem with the MP4 file recording with sound. The video is great. But there is no sound. Adding a log. files in place, but for some reason does not work. I use Debian and the latest version 1.6 EXECUTE sofia/internal/1004@192.168.242.132 record(/usr/local/freeswitch/recordings/testrecord.mp4) [00007f16f00c7fc8] core libvlc warning: cannot load module `/usr/lib/vlc/plugins/access/libavio_plugin.so' (libvpx.so.1: cannot open shared object file: No such file or directory) [00007f16f00c7fc8] core libvlc warning: cannot load module `/usr/lib/vlc/plugins/demux/libavformat_plugin.so' (libvpx.so.1: cannot open shared object file: No such file or directory) [00007f16f00c7fc8] core libvlc warning: cannot load module `/usr/lib/vlc/plugins/stream_out/libstream_out_chromaprint_plugin.so' (libvpx.so.1: cannot open shared object file: No such file or directory) [00007f16f00c7fc8] core libvlc warning: cannot load module `/usr/lib/vlc/plugins/packetizer/libpacketizer_avparser_plugin.so' (libvpx.so.1: cannot open shared object file: No such file or directory) [00007f16f00c7fc8] core libvlc warning: cannot load module `/usr/lib/vlc/plugins/codec/libavcodec_plugin.so' (libvpx.so.1: cannot open shared object file: No such file or directory) [00007f16f00c7fc8] core libvlc warning: cannot load module `/usr/lib/vlc/plugins/codec/libhwdummy_plugin.so' (libvpx.so.1: cannot open shared object file: No such file or directory) 2015-05-26 03:24:54.095101 [DEBUG] mod_vlc.c:832 VLC attempt to open #transcode{vcodec=h264,acodec=aac}:std{access=file,mux=mp4,dst=/usr/local/freeswitch/recordings/testrecord.mp4} write video -- S pozdravem, Ing.Denis Jakovlev mob.tel. 775-415-382