Static and dynamic plugins now have the same interface. The standard --enable-static/--enable-shared toggle are sufficient.
These are the openh264 elements released under the BSD-2 license by Ericsson as part of the OpenWebRTC project. https://github.com/EricssonResearch/openwebrtc-gst-plugins https://bugzilla.gnome.org/show_bug.cgi?id=737788