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| MF_E_NET_STREAMGROUPS_NOT_SUPPORTED | MF_E_NET_INVALID_PRESENTATION_DESCRIPTOR |
MF_E_NET_MANUALSS_NOT_SUPPORTED
MF_E_NET_MANUALSS_NOT_SUPPORTED indicates that the network source controls stream selection itself and does not allow the application to select streams manually.
Diagnostic discriminator: Open the same source with automatic stream selection. If that succeeds while manual selection returns this HRESULT, keep the fix at the stream-control policy layer; changing media payload or codecs cannot make an unsupported manual-selection operation valid.
What to check for MF_E_NET_MANUALSS_NOT_SUPPORTED
- Fall back to automatic stream selection for this source.
- Verify that the requested tracks exist in the presentation descriptor before treating the failure as a server error.
- Do not confuse this with a missing codec; it is an unsupported control operation.
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