libav-tools is not available

[AnthonyKNorman]

Describe the bug
libav-tools is not available

To Reproduce
Steps to reproduce the behavior:

1. https://doc.kerberos.io/2.0/installation/Raspbian calls for

sudo apt-get update && sudo apt-get install libav-tools

2. However, the result is

Package libav-tools is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  ffmpeg

E: Package 'libav-tools' has no installation candidate

Expected behavior
I expect libav-tools to install

Screenshots

Operating System and Device (please complete the following information):

• Host system: Raspberry Pi Zero
• OS:Raspbian Buster Lite
• Installation Method: Generic Installation

Additional context

[tzven0]

Hey, i think this is a raspbian buster issue. Try installing ffmpeg.

[cedricve]

indeed buster has some bugs, might make sense too install ffmpeg.