What does HRESULT 0xC00D1BAC (NS_E_NONSQUAREPIXELMODE_MISMATCH) mean?

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Constant name:

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Description:

The same source index in different audiences should have the same nonsquare pixel mode.%0

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NS_E_INTERLACEMODE_MISMATCH	NS_E_SMPTEMODE_MISMATCH

NS_E_NONSQUAREPIXELMODE_MISMATCH

Diagnostic meaning beyond the standard text

For NS_E_NONSQUAREPIXELMODE_MISMATCH (0xC00D1BAC), the actionable event is non-square-pixel mode differs across audiences sharing a source index.

Why the session can reach this point

A Windows Media Encoder profile declares content types and one or more audiences. Each audience maps source indexes to audio, video, script or file streams and must remain structurally consistent with the other audiences in a multiple-bit-rate profile.

Individual fields may be syntactically valid while the complete profile is inconsistent across audiences or does not match the source group. One concrete way to reach the condition is that only one audience enables anamorphic output.

Decision path

Record 0xC00D1BAC, the Encoder version and the exact API call or property access that returned it.
Export the current .wme or .prx configuration, then capture non-square-pixel flag and aspect ratio per audience.
Verify the profile, audience and stream topology precondition without changing the source, profile and output sink at the same time.
Run one controlled comparison that changes only the identified precondition: align pixel-aspect mode for that source index across audiences.

Codes with similar symptoms but different owners

Result	Why it differs
`NS_E_INTERLACEMODE_MISMATCH`	the same source index has different interlace modes across audiences
`NS_E_SMPTEMODE_MISMATCH`	SMPTE timecode mode differs across audiences for the same source index
`NS_E_INVALID_INPUT_STREAM`	an input stream type or index does not identify a valid source stream

Safe recovery

Align pixel-aspect mode for that source index across audiences.

Do not repair a profile by deleting arbitrary audiences; export the .prx profile first and compare the same source index across every audience.

Discriminating evidence: Compare the non-square-pixel flag and pixel-aspect settings for the same video source index across every audience. A profile can have valid bitrates and still fail here when one audience changes the anamorphic or square-pixel mode relative to the others.

Source material

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