a52dec software package provides virtual package provided by liba52-0.7.4-dev, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install a52dec
a52dec is installed in your system.
Make ensure the a52dec package were installed using the commands given below,
$ sudo dpkg-query -l | grep a52dec*
You will get with a52dec package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Virtual packages |
| Package | a52dec |
| Version | |
| Description | virtual package provided by liba52-0.7.4-dev |
| Sub Section | Virtual |