https://bugs.winehq.org/show_bug.cgi?id=40017
--- Comment #11 from Michael Gooch goochmi@gmail.com --- opencl package management person got back to me, the opencl packages for devel were actually missing, so that was my fault.
The pkg-config results for gstreamer do appear to be giving your configure script the paths for 64 bit gstreamer though. i'm trying to see if I can figure out what to do about that.