Error while loading shared libraries: libavcodec.so.57

What does /etc/apt/sources.list.d/kaltura.list contain?

more /etc/apt/sources.list.d/kaltura.list
deb [arch=amd64] http://installrepo.kaltura.org/repo/apt/debian lynx main

# dpkg -l kaltura-nginx

dpkg -l kaltura-nginx
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                          Version             Architecture        Description
+++-=============================-===================-===================-===============================================================
iF  kaltura-nginx                 1.10.2-1            amd64               Nginx web/proxy server - for Kaltura

# dpkg -l kaltura-ffmpeg

Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                          Version             Architecture        Description
+++-=============================-===================-===================-===============================================================
ii  kaltura-ffmpeg                2.7.2-1+b8          amd64

> # ldd /opt/kaltura/nginx/sbin/nginx |grep libavcodec.so

ldd /opt/kaltura/nginx/sbin/nginx |grep libavcodec.so
	libavcodec.so.57 => not found

> # dpkg -S /opt/kaltura/ffmpeg-2.7.2/lib/libavcodec.so.56

dpkg -S /opt/kaltura/ffmpeg-2.7.2/lib/libavcodec.so.56
kaltura-ffmpeg: /opt/kaltura/ffmpeg-2.7.2/lib/libavcodec.so.56