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VFW_S_DVD_CHANNEL_CONTENTS_NOT_AVAILABLE
DVD audio channel roles could not be determined
VFW_S_DVD_CHANNEL_CONTENTS_NOT_AVAILABLE is HRESULT 262796 (0x0004028C) from Video for Windows. The documented description is “The audio stream did not contain sufficient information to determine the contents of each channel.” The high-order severity bit is clear, so this is a success result, but it carries more information than plain S_OK.
The DVD audio stream lacked enough metadata to identify the content carried by each audio channel.
State to verify
The central question is whether channel count and sample format may be known even though semantic labels such as left, center, or surround are unavailable.
A reliable interpretation of this result names the exact method contract, the object instance, and the outputs that remain valid. This prevents a success-with-information result from being promoted to full success or demoted to a generic error.
Where the result is encountered
- This result can appear in DVD Navigator audio inspection; record the producing interface and method.
- It can appear in surround-layout UI; record the producing interface and method.
- It can appear in applications choosing downmix or accessibility behavior from channel roles; record the producing interface and method.
Evidence to preserve
- Preserve audio stream number and coding mode.
- Preserve channel count and speaker configuration.
- Preserve DVD attributes returned by the navigator.
- Preserve decoder output layout.
- Preserve user-selected audio track.
Diagnostic sequence
- Capture the raw HRESULT
0x0004028Cimmediately after the returning method and record whether the caller usedSUCCEEDED,FAILED, equality testing, or exception translation. - Verify the method-specific state: channel count and sample format may be known even though semantic labels such as left, center, or surround are unavailable.
Correct handling, retry, and recovery
Use conservative channel handling and avoid displaying invented labels. Let the decoder or audio endpoint apply a safe layout when authoritative channel-role metadata is absent.
Practical validation scenario
A DVD exposes six audio channels without reliable role descriptors. The player renders through the decoder, labels the track generically as 6-channel, and avoids a channel-specific remap.
Difference from nearby HRESULT values
VFW_S_AUDIO_NOT_RENDERED means no audio path was built; this status means audio exists but channel-content metadata is incomplete.
Developer and administrator guidance
References
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