What does HRESULT 0xC00D0BD3 (NS_E_DUPLICATE_PACKET) mean?

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Constant name:

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Description:

The packet is a duplicate of one received before

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NS_E_LATE_PACKET	NS_E_SDK_BUFFERTOOSMALL

NS_E_DUPLICATE_PACKET

`NS_E_DUPLICATE_PACKET`: diagnosis and verification

NS_E_DUPLICATE_PACKET (0xC00D0BD3) means the receiver recognized a packet sequence that had already been accepted.

Profile and sample evidence

Capture	Why it matters
Owning call	Record the API method, object identity, thread or callback and timestamp for the duplicate packet media-format check.
Values to record	ASF packet number, packet size, send and receive timestamps, sequence number, jitter window and the profile packet-size setting.
Comparison case	Use one known-good resource that exercises the same duplicate packet media-format check while changing only the rejected precondition.

Failure anatomy

The duplicate packet media-format check is reached when the receiver recognized a packet sequence that had already been accepted. The caller must not assume that the next filter, packet, session or metadata state exists after it.

As a controlled comparison, replay the same packet sequence in a controlled trace and compare ordering, timestamps and duplicate detection without changing the codec. If the same operation then returns a different HRESULT, diagnose that later result separately.

Nearby results are not interchangeable

Main distinction: duplicate detection concerns sequence identity, whereas lateness concerns arrival time.

Nearby HRESULT	How to compare it
`NS_E_MAX_PACKET_SIZE_TOO_SMALL`	the configured ASF packet ceiling cannot contain data generated by the profile.
`NS_E_LATE_PACKET`	a network packet missed the useful playout or reordering window.
`NS_E_SDK_BUFFERTOOSMALL`	the caller-provided output buffer is smaller than the size reported by the SDK.

A controlled media-format test

Log 0xC00D0BD3, the exact operation and the first failure time.
Preserve ASF packet number, packet size, send and receive timestamps, sequence number, jitter window and the profile packet-size setting.
Perform one isolated test: replay the same packet sequence in a controlled trace and compare ordering, timestamps and duplicate detection without changing the codec.
Repeat through the same API and protocol path; a different player or local-copy test is useful only as a comparison, not as proof that the duplicate packet media-format check is fixed.

Misleading actions

changing several profile and codec settings at once, which hides the first incompatible field.
Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the duplicate packet media-format check.

Technical references

Treat it as resolved only when the same API path succeeds at this stage; success through a different player or cached copy is merely supporting evidence.

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