Nikolay Sivov (@nsivov) commented about dlls/mfreadwrite/tests/mfplat.c:
test_source_reader_transforms_d3d11(); test_reader_d3d9(); test_sink_writer_create();
- test_sink_writer_mp4();
- test_sink_writer_get_object();
- test_sink_writer_set_stream();
This one would be _add_stream() or _AddStream(), doesn't matter which.