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NS_E_WMP_JPG_INVALID_FORMAT
The exact condition behind the dialog
NS_E_WMP_JPG_INVALID_FORMAT is HRESULT 0xC00D1034. At the JPEG invalid format checkpoint it means the JPEG marker stream is structurally invalid before a complete frame can be decoded; the result belongs to the skin artwork decoder and raster-file contract, not to an unspecified Player failure.
An additional test is to record the first invalid marker or segment length and its byte offset; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
How to prove the condition
- Start with the symbolic HRESULT; do not diagnose JPEG invalid format from the final dialog alone.
- Use this deciding observation for this condition: record the first invalid marker or segment length and its byte offset.
- Apply the smallest supported remedy for this condition: re-export the image from an intact source or repair the malformed marker sequence.
Minimum useful incident record
Capture state before Player cleanup:
- What to verify: record the first invalid marker or segment length and its byte offset.
- Artifact: standalone decode result outside the skin package using the same bytes.
- State: archive member name, byte length, hash and file signature.
- Object identity: format header fields, dimensions, bit depth and color model.
- Underlying evidence: first invalid marker/chunk and its byte offset.
- Correlation: decoder-supported coding mode versus the file’s declared mode.
Why the producing component matters
Before changing state, remember that a filename extension is not sufficient evidence of image format; the decoder acts on signatures, headers, markers, chunks and decoded dimensions. A second platform rule is that a file can be valid according to a modern format specification yet use a coding option that the legacy WMP skin decoder does not implement.
Representative case: The file starts with a JPEG SOI marker, but a damaged segment length makes the following marker stream impossible to parse.
Targeted fix
The targeted correction for this condition is to re-export the image from an intact source or repair the malformed marker sequence. Keep the original failing input until the same operation succeeds after one controlled change.
- Avoid changing only the extension or MIME type while leaving the encoded bytes unchanged; it can destroy the artifact or state needed to explain this result.
- Avoid repeatedly recompressing the sole source image without retaining an original and a decoded pixel comparison; that can replace the original HRESULT with a secondary failure from another layer.
Neighboring codes to separate
| Result | Different condition |
|---|---|
NS_E_WMP_JPG_BAD_DCTSIZE | The JPEG requests a DCT block or scaled-DCT mode unsupported by the embedded decoder |
NS_E_WMP_JPG_JERR_ARITHCODING_NOTIMPL | The JPEG uses arithmetic entropy coding that the WMP skin decoder does not implement |
NS_E_WMP_BMP_INVALID_FORMAT | The BMP header or pixel-layout fields are internally inconsistent |
Completion criteria
Technical references
- Skin files and image resources — documentation for this HRESULT.
- ITU-T T.81 JPEG specification — normative or platform material relevant to this HRESULT.
- JPEG standards overview — API or format context.
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