What does HRESULT 0xC00D1B70 (NS_E_NO_VALID_OUTPUT_STREAM) mean?

NS_E_NO_VALID_OUTPUT_STREAM

NS_E_NO_VALID_OUTPUT_STREAM: the failing boundary

NS_E_NO_VALID_OUTPUT_STREAM (0xC00D1B70) means Cannot find a valid output stream from the source. The important boundary is source output discovery; do not replace this result with a broader “Windows Media failed” diagnosis.

What this result proves

This code proves that the configured source exposes no output stream that the encoder can use. It does not, by itself, prove a codec, permissions, network, device, or media problem outside that boundary. Preserve the first lower-level result when one exists, because later Player or Encoder errors can hide the original cause.

Evidence and focused verification

Record source filters/pins or stream descriptors and rejection reasons; select a supported stream or correct source configuration. Keep the media object, endpoint, profile, or device identity fixed while changing only that rejected precondition. A successful retest should pass this exact boundary; a different HRESULT from a later stage is new evidence, not recurrence of NS_E_NO_VALID_OUTPUT_STREAM.

Technical references

• Windows Media Format SDK.
• Microsoft HRESULT registry.