O/S; Ubuntu 19.10 on AMD (Ryzen5).
Objective; To play .mp4 video clips.
Steps taken:
Ran:
sudo apt install libdvdnav4 libdvdread4 gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly libdvd-pkg
The install seemed to have proceeded without any problems, but the Terminal screen then filled with the following, became totally unresponsive & required a New Tab to progress.
Attempted to run instruction from screenshot:
sudo dpkg-reconfigure libdvd pkg
This resulted in an error message saying:
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
Attempted to run
sudo apt install ubuntu-restricted-extras
resulting in error message:
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5777 (dpkg) - open (11: Resource temporarily unavailable) N: Be aware that removing the lock file is not a solution and may break your system. E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
Attempting to uninstall/purge resulted in another error message saying 'dpkg was interrupted, you must manually etc, etc' and to run:
sudo dpkg --configure -a
Running this resulted in the same unresponsive Terminal screen as above Terminal Screen screenshot.
Any advice on how to proceed from here would be most appreciated.