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MF_E_TOPOLOGY_VERIFICATION_FAILED
MF_E_TOPOLOGY_VERIFICATION_FAILED is a protected-content topology trust failure, not simply a failure to connect media types. In the PMP model, the policy engine examines the resolved pipeline, identifies trusted outputs, and negotiates the protection systems required by each input trust authority.
Inspect the resolved topology and trust boundaries
- Save the full topology that was submitted to the Media Session, including node IDs, CLSIDs, activation objects, and resolved transforms.
- Identify components inserted by a custom topology loader or registered locally; components used inside a protected environment must satisfy the protected-media trust requirements.
- Preserve any earlier signature, revocation, or output-policy HRESULT. Verification can be the stage where a more specific trust problem becomes visible.
Changing decoder preference at random is not a reliable fix. First determine which node or output crosses the protected boundary and whether the selected component is valid for the protected process. Ordinary topology connectivity errors use other HRESULTs such as MF_E_TOPO_CANNOT_CONNECT.
Microsoft: PMP policy negotiation · Microsoft: trusted components in a PMP Media Session · Wine: mferror.h
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