This introduces a new alternative FFmpeg-based implementation for the MF byte stream handlers, while keeping the current GStreamer-based as default.
The new implementation can be enabled by setting the DWORD value:
DisableGstByteStreamHandler = 1
in the HKCU\Software\Wine\MediaFoundation registry key.
-- v2: mfsrcsnk: Stub byte stream handlers if demuxing is supported. winedmo: Export a new winedmo_demuxer_check function. winedmo: Link and initialize FFmpeg on load.