HRESULT 0xC00D1B59 (NS_E_BAD_MARKOUT): meaning and diagnosis

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Description:

The mark-out time should be greater than the mark-in time and less than the file duration.%0

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NS_E_BAD_MARKIN	NS_E_NOMATCHING_MEDIASOURCE

NS_E_BAD_MARKOUT

Where the Encoder produces this result

0xC00D1B59 (NS_E_BAD_MARKOUT) identifies validation of IWMEncSource.MarkOut against MarkIn and the end of the source. This is an Encoder validation error; a later “cannot start encoding” dialog can hide the original HRESULT.

Windows Media Encoder builds a timeline for every selected source before samples enter the codec. Mark-in, mark-out, repeat and time-compression settings are therefore validated against the source duration and against each other before encoding begins.

What has already succeeded

A file that opens and reports a duration can still fail here because timeline validation happens after source discovery but before the first encoded sample. For example, a replacement input is shorter than the file used when the .wme session was authored. Reproduce the condition at the Encoder object that returned the HRESULT rather than treating it as a general codec or operating-system failure.

A controlled diagnostic sequence

Record 0xC00D1B59, the Encoder version and the exact API call or property access that returned it.
Export the current .wme or .prx configuration, then capture raw MarkIn and MarkOut values, detected duration and whether the source duration changed after relinking.
Verify the source timeline and clipping precondition without changing the source, profile and output sink at the same time.
Run one controlled comparison that changes only the identified precondition: choose a MarkOut later than MarkIn and no later than the actual source duration.

Nearby HRESULTs that mean something else

Result	Why it differs
`NS_E_BAD_MARKIN`	validation of IWMEncSource.MarkIn before the source timeline is committed
`NS_E_SOURCE_CANNOT_LOOP`	Repeat is enabled for a source type that cannot be replayed
`NS_E_MARKIN_UNSUPPORTED`	MarkIn or MarkOut clipping is requested for a source type that does not support seeking to marks

Corrective action at the right layer

To correct this, choose a MarkOut later than MarkIn and no later than the actual source duration. A retry is useful only after the recorded bad markout precondition changes.

Do not re-encode or trim the only copy of the input while diagnosing the timeline; preserve the original duration and timestamps so the invalid interval can be reproduced.

Technical references

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