[Bug 39597] Amstream demo application fails to play video file

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=39597

--- Comment #13 from joaopa  ---
Created attachment 76411
  --> https://bugs.winehq.org/attachment.cgi?id=76411
console output with quartz channel enabled

I modified the source to pinpoint where the proble occurs (playvideo.c)
// Build the filter graph for our multimedia stream
    HRESULT ret = pAMStream->OpenFile(L"Clock.avi", 0);
    printf("hresult = %0x", ret);
    if (FAILED((ret)))

ret= 80040217 which is VFW_E_CANNOT_CONNECT
In amstream/multimedia.c where openfile is implemented, the problem is in these
lines

if (SUCCEEDED(ret) && !(flags & AMMSF_NORENDER))
    {
        IFilterGraph2 *graph;

if (SUCCEEDED(ret = IGraphBuilder_QueryInterface(This->graph,
&IID_IFilterGraph2, (void **)&graph)))
        {
            DWORD renderflags = (flags & AMMSF_RENDERALLSTREAMS) ? 0 :
AM_RENDEREX_RENDERTOEXISTINGRENDERERS;

ret = IFilterGraph2_RenderEx(graph, This->ipin, renderflags, NULL);
            if (ret == VFW_E_CANNOT_RENDER) ret = VFW_E_CANNOT_CONNECT;
            else if (ret == VFW_S_PARTIAL_RENDER) ret = S_OK;

IFilterGraph2_Release(graph);
        }
        else
        {
            FIXME("Failed to get IFilterGraph2 interface, hr %#lx.\n", ret);
            ret = IGraphBuilder_Render(This->graph, This->ipin);
        }
    }

So the question is:
why does IFilterGraph2_RenderEx fail?