Bug#667573: x264: 10 bit builds

[Jonathan Rosser]

It would be really good to get a proper solution to this. I currently
require 8 bit and 10bit of x264 to be available to the same application
at the same time.

A typical use case would be simultaneously encoding 10bit 4:2:2 and 8
bit 4:2:0 versions of the same source video, this cannot be achieved
with linkage to a single x264 library.

[Alternatively an application that can encode in either 8 or 10 bit
modes is equally difficult to write]

I have resorted to building my own custom .deb for the 10 bit version
which installs to /usr/x264-10bit/... then a plug-in architecture and
dlopen() allow one executable to dynamically link against both the 8 and
10bit versions and keep both sets of symbols isolated from each other.

This is all fairly horrible, but works....

I don't see the 8 or 10 bit versions as been "alternatives" (overloaded
terminology, sorry!), I need them to be able to co-exist.

Anyway, just some input to help define what might be useful for a 10bit
x264 package.

Jonathan Rosser
Lead Research Engineer
BBC Research & Development