What does HRESULT 0x00040258 (VFW_S_AUDIO_NOT_RENDERED) mean?

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VFW_S_AUDIO_NOT_RENDERED reports that DirectShow completed partial playback or graph rendering without rendering the audio stream.

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VFW_S_VIDEO_NOT_RENDERED	VFW_S_RPZA

VFW_S_AUDIO_NOT_RENDERED

DirectShow playback omitted the audio stream

VFW_S_AUDIO_NOT_RENDERED is HRESULT 262744 (0x00040258) from Video for Windows. The documented description is “Cannot play back the audio stream: no audio hardware is available.” The high-order severity bit is clear, so this is a success result, but it carries more information than plain S_OK.

Graph construction completed for other streams but no usable audio output path was available.

State to verify

The central question is whether the user and caller know that picture may play without sound and whether audio is mandatory for the task.

Where the result is encountered

This result can appear in video-only playback fallback; record the producing interface and method.
It can appear in machines without an enabled audio endpoint; record the producing interface and method.
It can appear in unsupported audio decoder or renderer formats; record the producing interface and method.

Evidence to preserve

Preserve audio stream subtype and channel format.
Preserve unconnected audio pin.
Preserve audio renderer selection.
Preserve endpoint and device state.
Preserve decoder registration and graph topology.

Diagnostic sequence

Capture the raw HRESULT 0x00040258 immediately after the returning method and record whether the caller used SUCCEEDED, FAILED, equality testing, or exception translation.
Verify the method-specific state: the user and caller know that picture may play without sound and whether audio is mandatory for the task.

Correct handling, retry, and recovery

Continue silently only for content where audio is optional. Otherwise surface the missing audio path and collect endpoint and media-type evidence before changing system codecs.

Practical validation scenario

A kiosk plays a silent animation on a server without audio hardware. The application accepts the status for that asset, while a movie player treats the same result as degraded playback and reports it.

Difference from nearby HRESULT values

VFW_S_VIDEO_NOT_RENDERED omits video; it identifies the audio branch specifically.

References

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