https://bugs.winehq.org/show_bug.cgi?id=50779
--- Comment #10 from Rafał Mużyło galtgendo@o2.pl --- All those extra threads seem to come from unix side, at least WINEDEBUG=thread seems silent.
In GST_DEBUG shortly before freeze, there are beauties like:
4786:gst_decode_bin_expose:decodebin36:src_0 added new decoded pad
That's quite high, given that I doubt there are more than 8 streams at any given time.
Yet the point remains that disabling winegstreamer doesn't fully cover the problem, so it seems to happen deeper...
Yet, my best other guess - amstream - doesn't print anything obvious and mmdevapi looks clean.