What does HRESULT 0x80040220 (VFW_E_NO_PALETTE_AVAILABLE) mean?

 
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VFW_E_NO_COLOR_KEY_FOUND VFW_E_NO_DISPLAY_PALETTE

VFW_E_NO_PALETTE_AVAILABLE

Meaning and numerical form

VFW_E_NO_PALETTE_AVAILABLE is HRESULT 2147746336 (0x80040220; signed -2147220960). AllStat records its meaning as “No palette is available”. In practical terms, it is returned when a DirectShow renderer or media type requires palette information but no palette is available.

The severity bit in 0x80040220 is set, so this result is a failure result rather than a success or informational status. Its facility is 4 (FACILITY_ITF) and its low 16-bit code is 544 (0x0220). Those fields classify the value but do not identify the component instance, call, object or input that produced it.

Evidence to collect

A useful diagnostic record for this result includes the native API or interface method, component or CLSID, process and thread IDs, architecture, apartment where relevant, operation correlation ID, elapsed time, input identity, and the first state-changing event before failure. When diagnosing it, preserve IErrorInfo, an inner HRESULT, Win32 status, device event or provider message when available.

  • Capture 1 for this HRESULT: media subtype, bit depth and format block.
  • Capture 2 for this HRESULT: palette entry count and source buffer length.
  • Capture 3 for this HRESULT: AM_MEDIA_TYPE copy and ownership path.

Telemetry for this HRESULT should retain types, lengths, hashes, stable opaque identifiers and lifecycle generations while redacting content and credentials. This makes repeated incidents comparable without exposing media content, file paths, device identifiers or credentials.

Where the failure belongs

This result belongs to DirectShow filter-graph processing. DirectShow is a legacy, component-based media pipeline. Graph state, pin transport, negotiated media types, allocators, clocks, samples, renderers and source filters contribute separate contracts to the operation. The decisive condition is this: a DirectShow renderer or media type requires palette information but no palette is available. Record the first native producer instead of relying only on a framework exception translated several layers later.

Do not infer from this result alone that reinstalling, rebooting or repeating the whole workflow is appropriate. Because it can cross process and language boundaries, its correction depends on the object identity, lifecycle generation, input and state at the first failing call.

Likely causes

  • Possible cause 1 for this HRESULT: the source format omits required palette entries.
  • Possible cause 2 for this HRESULT: the renderer expects an indexed-color palette that the upstream filter did not provide.
  • Possible cause 3 for this HRESULT: palette data was lost during media-type copying.

Diagnostic sequence

  1. Capture it at the first native return and identify the exact object and method.
  2. Confirm that the observed path matches this condition: a DirectShow renderer or media type requires palette information but no palette is available.
  3. compare the live state with the method contract before changing configuration.
  4. collect the code-specific evidence listed above and preserve any more specific preceding error.
  5. change one evidence-backed cause at a time, then repeat the smallest operation that can prove the correction.
  6. Add a regression check that distinguishes it from the related outcomes described below.

Correction and retry boundary

  • Corrective action 1 for this HRESULT: supply a complete palette for indexed formats.
  • Corrective action 2 for this HRESULT: preserve palette data when copying format blocks.
  • Corrective action 3 for this HRESULT: select a true-color format when palette presentation is not supported.

Retry guidance for this HRESULT. Retry after renegotiating a media type that includes valid palette data. A retry must avoid this hazard: replay obsolete samples, duplicate graph changes or reuse interfaces from an earlier topology generation. It must also preserve the evidence needed to locate the original producer of it.

Difference from nearby HRESULTs

VFW_E_NO_DISPLAY_PALETTE means the display itself does not use a palette, while it means required palette data is absent. Keep these outcomes separate in logs, exception mappings, user messages, dashboards and automated retry policy.

Developer and operational guidance

Code handling it should log the failed stage before cleanup, keep ownership and lifecycle transitions explicit, and avoid converting every failure into a generic message. Tests for this HRESULT should cover the primary cause, one adjacent HRESULT and the retry boundary so a future change cannot turn a deterministic contract failure into an uncontrolled loop.

Operational repair for this HRESULT should use supported filter installation, device, graph-building and renderer configuration paths. Avoid unsupported configuration edits or component replacement unless evidence identifies that layer. Retain the original trace and a post-fix trace so the result can be attributed and the change reversed.

Practical scenario

A custom source copies only the BITMAPINFOHEADER and omits following palette entries; preserving the complete format block resolves it. The result scenario narrows the result to a reproducible contract boundary and supplies a concrete before-and-after test.

Official Microsoft references

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