Error while loading shared libraries: libavcodec.so.57

Hi @fravetier,

Sorry, I was looking at an older version when writing the last answer. I've revised the versions in my answer above.
You should have:
kaltura-ffmpeg 3.1.3-2+b3
kaltura-nginx 1.10.2-1

Your kaltura-nginx version seems fine, kaltura-ffmpeg is old. Can you please:
# aptitude update
or:
# apt-get update

and then:
# apt-cache policy kaltura-ffmpeg

you should see:

  Candidate: 3.1.3-2+b2
..
        500 http://installrepo.kaltura.org/repo/apt/debian/ lynx/main amd64 Packages

And then run:
# aptitude install kaltura-ffmpeg
or:
# apt-get install kaltura-ffmpeg

which should upgrade kaltura-ffmpeg to 3.1.3-2+b2.

If your output for apt-cache policy kaltura-ffmpeg is different, please paste it here.