What does HRESULT 0xC00D1B5F (NS_E_MISMATCHED_MEDIACONTENT) mean?

NS_E_MISMATCHED_MEDIACONTENT

NS_E_MISMATCHED_MEDIACONTENT: the failing boundary

NS_E_MISMATCHED_MEDIACONTENT (0xC00D1B5F) means The profile's media types must match the media types defined for the session. The important boundary is profile/source media-type match; do not replace this result with a broader “Windows Media failed” diagnosis.

What this result proves

This code proves that media types declared by the profile do not match those configured for the session. It does not, by itself, prove a codec, permissions, network, device, or media problem outside that boundary. Preserve the first lower-level result when one exists, because later Player or Encoder errors can hide the original cause.

Evidence and focused verification

Record source media types and profile stream media types side by side; change only the mismatched stream definition and revalidate. Keep the media object, endpoint, profile, or device identity fixed while changing only that rejected precondition. A successful retest should pass this exact boundary; a different HRESULT from a later stage is new evidence, not recurrence of NS_E_MISMATCHED_MEDIACONTENT.

Technical references

• Windows Media Format SDK.
• Microsoft HRESULT registry.