The error message you’re seeing indicates that the package ‘libcrystalhd-dev’ is not available in your system’s package repositories, which is causing issues with installing the ant media server.

There are a few possible solutions to this problem: Check if the package is available from another repository:

It’s possible that the package is available from a different repository. You can try searching for the package in other repositories by running the following command in your terminal:

sudo apt search libcrystalhd-dev

This will show a list of all available packages with the name ‘libcrystalhd-dev’. If you find the package in another repository, you can try installing it using the following command:

sudo apt-get install libcrystalhd-dev=<version> -y

1. Replace ‘<version>’ with the specific version you want to install.

2. Install the package from source: If the package is not available from any repository, you can try downloading the package source code and compiling it yourself.

You can download the source code from the following link: https://packages.ubuntu.com/bionic/libcrystalhd-dev 

Once you’ve downloaded the source code, follow the installation instructions provided in the README file.

3. Use an alternative package: If you don’t require the specific features provided by ‘libcrystalhd-dev’, you can try using an alternative package that provides similar functionality.

You can search for alternative packages using the following command:

sudo apt search <package-name> 

Replace ‘<package-name>’ with the name of the package you’re looking for.

I hope this helps you resolve the issue.