Best way to manually replace a package with a customized one

[Yahya Mohammad <mfyahya@gmail.com>]

Hi list,

I want to use a custom compiled version of ffmpeg to enable some extra
features. What is the best way to do this? I do not want to break
anything that depends on ffmpeg.

I tried making my own .deb package using checkinstall. This works
fine, but whenever I run apt-get upgrade it wants to replace my
customized ffmpeg.

Thanks,
Yahya