HRESULT 0xC00D1BCB (NS_E_INVALID_VIDEO_BUFFERMAX

Status / error code:

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Constant name:

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Operating System:

Description:

The value of the video maximum buffer size setting must be greater than the video buffer size setting.%0

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NS_E_INVALID_VIDEO_BUFFERMAX	NS_E_INVALID_VIDEO_WIDTH_ALIGN

NS_E_INVALID_VIDEO_BUFFERMAX_2

Diagnostic meaning beyond the standard text

For NS_E_INVALID_VIDEO_BUFFERMAX_2 (0xC00D1BCB), the actionable event is maximum video buffer is not greater than the ordinary video buffer.

Why the session can reach this point

The video profile selects a codec and rate-control mode, then supplies bitrate, peak rate, frame rate, frame size, key-frame spacing, quality, buffer and optional interlace or pixel-aspect settings. The codec validates both values and combinations.

A source preview does not prove that the output profile is accepted; output dimensions and rate-control settings are validated by the selected encoder codec. One concrete way to reach the condition is that both buffer fields are populated from one UI control.

Decision path

Record 0xC00D1BCB, the Encoder version and the exact API call or property access that returned it.
Export the current .wme or .prx configuration, then capture video buffer and maximum buffer values in the same audience.
Verify the video stream and audience settings precondition without changing the source, profile and output sink at the same time.
Run one controlled comparison that changes only the identified precondition: make the maximum strictly larger while remaining codec-valid.

Codes with similar symptoms but different owners

Result	Why it differs
`NS_E_INVALID_VIDEO_BUFFERMAX`	maximum video buffer value is outside the accepted range
`NS_E_INVALID_VIDEO_WIDTH_ALIGN`	output width violates the selected codec or interlaced-mode alignment
`NS_E_INVALID_VIDEO_BUFFER`	video buffer setting is invalid for the selected codec and bitrate mode

Safe recovery

Make the maximum strictly larger while remaining codec-valid.

Do not rely on the UI label alone; record the numeric profile fields and codec identity before changing presets.

Discriminating evidence: Capture the maximum video buffer value together with the selected codec, bitrate and source index. The rejected field is the buffer ceiling itself, so changing key-frame spacing or quality percentages is not proof that this boundary was corrected.

Source material

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