04 and I was trynna install a Screen recorder in my ubuntu. I installed SimpleScreenRecorder and when I was trying to record the files there was this error "H.264 decoder is required to play this file." So I tried to fix it by using commands : "sudo apt-get install ubuntu-restricted-extras"
Link to the website I got to know about SimpleScreenRecorder: https://tipsonubuntu.com/2017/02/28/install-simple-screen-recorder-ubuntu-16-04-16-10/
Link to the command I got for solving the problem: How to install the MPEG-4 AAC decoder and the H.264 decoder?
After I did the command I found out that the command I ran was for ubuntu 18 so maybe that's why the problem is coming. Now i have this thing on my notification: "An error occurred, please run package manager from the right-click menu or apt-get in a terminal to see what is wrong. Error: Broken count>0. This usually happens when you install packages that have unmet dependencies."
Problems that is occurring when i try to install any package from terminal:
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 11285 (apt-get)
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?
Note: I am super new with Linux and i don't know anything, please have patience with me. Thank you
