I composed a patch in which all of the basic gstreamer stuff (sans
python bindings) are ported to meson.  Perhaps someone might want this
patch to be split, so that each package is modified separately, but I
find that we can treat this as a logical unit as-is.

Of particular note is the disabling of the doc output.  It appears as
if gstreamer really does not know how to build documentation in meson
without the not-yet packaged hotdoc.  However, with there being fewer
dependencies on the plugins rather than gstreamer itself, it should be
possible to port them later.

Finally, I've noticed that gst-plugins-base builds without gl or
wayland support.  Should I add a patch for this or is it fine as-is?

Regards,
Leo