Install libgmerlin-avdec1 by entering the following commands in the terminal:
sudo apt update sudo apt install libgmerlin-avdec1
Description:
general multimedia decoding library
Gmerlin_avdecoder is a general purpose media decoding library. It was written as a support library for gmerlin, but it can also be used by other applications. You don't even need gmerlin installed, only gavl. . This package provides the shared object necessary to run an application using Gmerlin_avdecoder.
Homepage: http://gmerlin.sourceforge.net/
Version: 1.2.0~dfsg-9build2
Section: universe/libs