adrian@li137-80:~$ sudo apt update
Hit:1 http://mirrors.linode.com/ubuntu xenial InRelease
Hit:2 http://mirrors.linode.com/ubuntu xenial-updates InRelease
Hit:3 http://mirrors.linode.com/ubuntu xenial-backports InRelease
Hit:4 http://mirrors.linode.com/ubuntu xenial-security InRelease
Hit:5 http://ppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu xenial InRelease    
Reading package lists... Done
Building dependency tree       
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.
adrian@li137-80:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libavcodec-extra
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
adrian@li137-80:~$ sudo apt -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
adrian@li137-80:~$ apt list --upgradable
Listing... Done
libavcodec-extra/xenial,xenial 7:3.2-0~16.04.york0 all [upgradable from: 7:2.8.8-0ubuntu0.16.04.1]
N: There are 2 additional versions. Please use the '-a' switch to see them.
adrian@li137-80:~$ apt list --upgradable -a
Listing... Done
libavcodec-extra/xenial,xenial 7:3.2-0~16.04.york0 all [upgradable from: 7:2.8.8-0ubuntu0.16.04.1]
libavcodec-extra/xenial-updates,xenial-updates,xenial-security,xenial-security,now 7:2.8.8-0ubuntu0.16.04.1 all [installed,upgradable to: 7:3.2-0~16.04.york0]
libavcodec-extra/xenial,xenial 7:2.8.6-1ubuntu2 all