"libavcodec52: Depends: libfaad2 but it is not installable"

[Phillip Pi]

Dear Sirs or Madams:

How do I install/upgrade libavcodec52 and libavformat52 packages due to 
missing libfaad2 package in my old Debian box?

# apt-get install libavcodec52 libavformat52
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
   libavcodec52: Depends: libfaad2 but it is not installable
E: Broken packages

# apt-get install libavcodec52 libavformat52 libfaad2
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libfaad2 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
E: Package libfaad2 has no installation candidate

# apt-get install libfaad2
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libfaad2 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
E: Package libfaad2 has no installation candidate

This started a few days ago. Is this a bug? Thank you in advance. :)

Sincerely yours,
Phillip Pi