Zebediah Figura (@zfigura) commented about dlls/quartz/tests/mpegsplit.c:
- LPWSTR name;
 - HRESULT hr;
 - LCID lcid;
 - IAMStreamSelect_QueryInterface(sel, &IID_IBaseFilter, (void **)&filter);
 - IBaseFilter_FindPin(filter, L"Video", &pin_video);
 - IBaseFilter_FindPin(filter, L"Audio", &pin_audio);
 - IPin_QueryInterface(pin_video, &IID_IUnknown, (void **)&unk_video);
 - IPin_QueryInterface(pin_audio, &IID_IUnknown, (void **)&unk_audio);
 - hr = IAMStreamSelect_Count(sel, &stream_count);
 - ok(hr == S_OK, "Got hr %#lx.\n", hr);
 - ok(stream_count == 2, "Got %lu streams.\n", stream_count);
 - hr = IAMStreamSelect_Info(sel, 0, &mt, &flags, &lcid, &group, &name, &object, &unk);
 - ok(hr == S_OK, "Got hr %#lx.\n", hr);
 
Since we've implemented "mt", can we check its contents?