2.7.1 building on ubuntu 18.04 lts

[Jan Gruuthuse]

Are these still used in avidemux?
- libmad0-dev - MPEG audio decoder development library
- libvpx-dev  - VP8 and VP9 video codec
- libzip-dev  - library for reading, creating, and modifying zip archives

[eumagga0x2a]

If you build with the system libmad by adding the --with-system-libmad build option, you need libmad0-dev. libvpx-dev is not needed, libzip-dev may be required by some other dependencies.

[Jan Gruuthuse]

Thanks, added libmad0-dev and libzip-dev

[eumagga0x2a]

Maybe I was unclear. You need libmad0-dev exclusively in the case when you add the --with-system-libmad option to the bootstrap script. Only then. You don't need it otherwise.

[Jan Gruuthuse]

Ok, adjusted 18.04 like you explained