Install libgstreamermm-1.0-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libgstreamermm-1.0-doc
Description:
C++ wrapper library for GStreamer (documentation)
GStreamer is a streaming media framework, based on graphs of filters which operate on media data. GStreamermm is a C++ wrapper library for the multimedia library GStreamer. It is designed to allow C++ development of applications that work with multi-media. . This package contains the documentation and examples.
Homepage: http://gstreamer.freedesktop.org/bindings/cplusplus.html
Version: 1.10.0+dfsg-1
Section: universe/doc