HRESULT 0xC00D36D0 (MF_E_UNSUPPORTED_RATE): meaning and diagnosis

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The media component does not support the requested playback rate.

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MF_E_RT_UNAVAILABLE	MF_E_THINNING_UNSUPPORTED

MF_E_UNSUPPORTED_RATE

MF_E_UNSUPPORTED_RATE means that the target object cannot play at the requested rate under the requested thinning mode. It is a capability result, not an instruction to keep retrying the same rate.

Query before committing

Use IMFRateSupport::IsRateSupported for the exact rate and thinning choice.
When requested, inspect the nearest supported rate returned by the API instead of inventing a fallback.
Check the active source, sink, and session capabilities; one component can limit the effective rate range.

Reverse playback and rate-transition failures have separate status codes and should not be collapsed into this one.

Microsoft: IMFRateSupport::IsRateSupported · Microsoft: seeking, fast forward, and reverse play

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