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NS_E_WMP_IMAGE_FILETYPE_UNSUPPORTED
Where the Player stopped
Windows Media Player reports NS_E_WMP_IMAGE_FILETYPE_UNSUPPORTED (0xC00D1022) when the resource signature identifies an image type that the WMP skin loader does not support. The image file type unsupported condition is owned by the image-loading path used by Windows Media Player skins to identify GIF, PNG, BMP or JPEG data, validate format-specific headers and create a bitmap usable by a UI control.
An additional test is to record the actual magic bytes and compare them with the filename extension and declared resource type; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
Investigation order
- Start with the symbolic HRESULT; do not diagnose image file type unsupported from the final dialog alone.
- Record the bytes or object state that produced this condition before automatic recovery mutates it.
- Exclude a stale callback or superseded object instance as the source of this event.
- Use this deciding observation for this condition: record the actual magic bytes and compare them with the filename extension and declared resource type.
- Apply the smallest supported remedy for this condition: convert the source to a documented skin image format while retaining the original.
The surrounding WMP state
A filename extension is not sufficient evidence of image format; the decoder acts on signatures, headers, markers, chunks and decoded dimensions. A second relevant constraint 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: A WebP or another unsupported raster file is renamed with a familiar extension and placed in the skin archive.
Inputs that distinguish the causes
Preserve the first occurrence before retry or fallback changes the evidence. Capture one consistent object instance:
| Field | What to record |
|---|---|
| Decisive check | Record the actual magic bytes and compare them with the filename extension and declared resource type |
| Artifact identity | Format header fields, dimensions, bit depth and color model for this reproduction |
| Runtime state | First invalid marker/chunk and its byte offset for this reproduction |
| Owning object | Decoder-supported coding mode versus the file’s declared mode for this reproduction |
| Lower-level result | Standalone decode result outside the skin package using the same bytes for this reproduction |
| Correlation | Archive member name, byte length, hash and file signature for this reproduction |
Do not confuse it with nearby results
| Result | Different condition |
|---|---|
NS_E_WMP_IMAGE_INVALID_FORMAT | The image type is recognized, but its common header or dimensions are invalid before format-specific decoding |
NS_E_WMP_GIF_UNEXPECTED_ENDOFFILE | The GIF decoder cannot obtain all bytes required to finish the image |
NS_E_WMP_GIF_INVALID_FORMAT | The GIF resource fails a format or decoder capability check before it can become skin artwork |
Verification after correction
After correction, create a fresh Player, control, parser or playlist object and rerun the smallest reproducer. Verify the resulting resource, list membership, saved file, library object or play state.
What a real fix must change
The targeted correction for this condition is to convert the source to a documented skin image format while retaining the original. 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.
Technical references
- Skin files and image resources — documentation for this HRESULT.
- Windows Media Player skins — normative or platform material relevant to this HRESULT.
- Skin definition file structure — API or format context.
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