Install libgupnp-av-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libgupnp-av-doc
Description:
Audio/Visual utility library for GUPnP (documentation)
An audio/visual utility library for GUPnP, providing DIDL parser/writer and search criteria parser objects. . This package contains the documentation.
Homepage: http://www.gupnp.org
Version: 0.12.10-1
Section: universe/doc