What does HRESULT 0xC00D715C (MF_E_SIGNATURE_VERIFICATION_FAILED) mean?

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A media component did not pass the signature verification required by the protected path.

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MF_E_TOPOLOGY_VERIFICATION_FAILED	MF_E_DEBUGGING_NOT_ALLOWED

MF_E_SIGNATURE_VERIFICATION_FAILED

MF_E_SIGNATURE_VERIFICATION_FAILED points to code-trust validation in the protected media environment. The PMP Media Session normally runs inside a Protected Environment, where only trusted, signed components can be loaded.

Verify the actual binary that the protected process sees

Record the full module path and version instead of assuming that the system copy was loaded.
Check for application-local codec or transform DLLs that shadow a serviced component.
If custom code is intentionally loaded into the protected environment, follow the protected-environment signing model; MFLoadSignedLibrary explicitly requires a library signed for that environment.

This error should not be treated as a media-format mismatch. A file can contain a supported codec while the component selected to process it fails the protected-path signature requirement. Keep signature validation separate from media-type negotiation and from GRL revocation: a revoked component and a component whose signature cannot be verified are different trust failures.

Microsoft: PMP Media Session trust rules · Microsoft: MFLoadSignedLibrary · Microsoft: protected component verification reasons

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