Revert "make parameter names consistently lowercase"

Unbreak UPNP. It appears as if the commit that it builds up on hasn't
made it to fixes, yet.

This reverts commit e50af7d5d1c119b8a7cb3fb9d7444de4b7e270dc.
VAAPI: Don't try to crop frames, they have no real buffer attached.

Refs #12130
Signed-off-by: Stuart Auchterlonie <stuarta@squashedfrog.net>

(cherry picked from commit 3b621f5c4fd194aefe1c15bad78807ce85a13853)