HRESULT 0xC00D36BD (MF_E_INVALIDTYPE): meaning and diagnosis

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Description:

Invalid type.%0

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MF_E_INVALIDNAME	MF_E_INVALID_FILE_FORMAT

MF_E_INVALIDTYPE

What the code tells you

MF_E_INVALIDTYPE (0xC00D36BD) is a failure result from Windows Media Foundation. The generated section above already contains the platform message; the useful extra information is that this result isolates the caller supplied a value whose COM, PROPVARIANT, media, or object type is incompatible with the requested operation.

The producer is the interface that validates the type before consuming its value, so diagnosis should begin with that object and its state rather than with a broad reinstall or an unrelated codec change. A representative occurrence is an IMFAttributes key expects UINT32 but receives a string, or a transform receives the wrong media subtype.

Checkpoint map

Checkpoint	Question to answer
Input	What exact name, type, index, URL, position, media item, account, device, or setup package reached the interface that validates the type before consuming its value?
State	Was the object initialized, connected, started, stopped, committed, authorized, or ready when it evaluated the caller supplied a value whose COM, PROPVARIANT, media, or object type is incompatible with the requested operation?
Evidence	the GUID or VARTYPE, major and subtype GUIDs, attribute key, stream number, and the type advertised by the object.
Completion	Which event, callback, output sample, provider result, or installer action should have followed `MF_E_INVALIDTYPE`?

Build a useful incident record

Collect MF_E_INVALIDTYPE data before automatic retries, Player navigation, device reconnection, source shutdown, or setup rollback destroys it. For MF_E_INVALIDTYPE, the minimum useful record contains the exact returning API, object identity, input identity, current lifecycle state, and the first lower-level failure.

A MF_E_INVALIDTYPE trace must not store credentials, license payloads, private keys, authorization headers, or unrelated library contents. For MF_E_INVALIDTYPE, record identifiers, hashes, lengths, status values, and redacted endpoint information sufficient to correlate the event.

Reproduce without erasing context

Reproduce once with tracing enabled and preserve 0xC00D36BD before any fallback.
Verify the decisive observation: the GUID or VARTYPE, major and subtype GUIDs, attribute key, stream number, and the type advertised by the object.
Run the controlled comparison: enumerate or query the supported type first, then retry with exactly one advertised type.
Return to the MF_E_INVALIDTYPE baseline, apply the supported correction, and create a new object generation if the old one entered a terminal state.
Repeat the MF_E_INVALIDTYPE test until the original call advances past this checkpoint and the expected output is validated.

Comparison with adjacent conditions

HRESULT	Boundary indicated by its standard description
`MF_E_INVALIDNAME`	Invalid name; compare this boundary specifically with `MF_E_INVALIDTYPE`.
`MF_E_UNEXPECTED`	An unexpected error has occurred in the operation requested; compare this boundary specifically with `MF_E_INVALIDTYPE`.
`MF_E_INVALIDINDEX`	Invalid index; compare this boundary specifically with `MF_E_INVALIDTYPE`.

The codes compared with MF_E_INVALIDTYPE can lead to the same user-facing “cannot play,” “operation failed,” or “setup failed” dialog. They remain technically different. Here, MF_E_FORMAT_CHANGE_NOT_SUPPORTED concerns a supported type that would require an unavailable transition.

Resolution and proof

For this occurrence, convert the value to the documented type or negotiate an accepted media type before setting it. For MF_E_INVALIDTYPE, avoid generic cleanup until the original artifact is copied and the producing state is known. A destructive reset during MF_E_INVALIDTYPE diagnosis can remove evidence while leaving the actual policy, device, network, format, or lifecycle error unchanged.

Verification of MF_E_INVALIDTYPE must use the same input and action that failed. Confirm the expected state transition and check that the workflow does not merely substitute another error after MF_E_INVALIDTYPE disappears.

Authoritative references

Media Foundation architecture — reference used for the MF_E_INVALIDTYPE checkpoint.
Media Foundation error codes — reference used for the MF_E_INVALIDTYPE checkpoint.
About Media Foundation transforms — reference used for the MF_E_INVALIDTYPE checkpoint.
Media types — reference used for the MF_E_INVALIDTYPE checkpoint.

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