What does HRESULT 0xC00D5218 (MF_E_TOPO_MISSING_STREAM_DESCRIPTOR) mean?

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A source-stream topology node has no stream descriptor object.

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MF_E_TOPO_MISSING_PRESENTATION_DESCRIPTOR	MF_E_TOPO_STREAM_DESCRIPTOR_NOT_SELECTED

MF_E_TOPO_MISSING_STREAM_DESCRIPTOR

MF_E_TOPO_MISSING_STREAM_DESCRIPTOR means the topology contains a source-stream node without the stream descriptor for the stream represented by that node. The topology loader needs this descriptor to determine the stream's media type and identity.

Build nodes from presentation-descriptor enumeration

Call GetStreamDescriptorByIndex on the source's presentation descriptor.
For each selected stream, attach the returned IMFStreamDescriptor with MF_TOPONODE_STREAM_DESCRIPTOR.
Keep the node's media source and presentation descriptor consistent with the stream descriptor's origin.

Querying IMFMediaStream::GetStreamDescriptor later is not a replacement for correctly constructing the topology node. Microsoft also advises modifying stream selection through the presentation descriptor rather than editing a stream descriptor directly.

Microsoft: creating playback topologies · Microsoft: stream descriptor enumeration · Microsoft: IMFMediaStream::GetStreamDescriptor

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