NS_E_WMP_DSHOW_UNSUPPORTED_FORMAT: meaning and diagnosis

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Description:

Windows Media Player cannot play the file. The Player might not support the file type or a required codec might not be installed on your computer.%0

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NS_E_WMP_UNSUPPORTED_FORMAT	NS_E_WMP_PLAYLIST_EXISTS

NS_E_WMP_DSHOW_UNSUPPORTED_FORMAT

Diagnosing NS_E_WMP_DSHOW_UNSUPPORTED_FORMAT in the Windows Media Player playback path

NS_E_WMP_DSHOW_UNSUPPORTED_FORMAT (0xC00D119A) is returned when the DirectShow playback path could not build a graph for the source media types.

This result belongs to DirectShow graph construction. Capture the source subtype and graph-build failure so an absent compatible filter is not confused with a damaged file or a later renderer problem.

Controlled playback comparison

Capture the resource identity and source filter, output pin types, candidate decoders, RenderFile result and graph-building log.
Verify that the caller uses the current Playlist, Media, Network, graph, device or DRM object instance.
Run the narrow experiment: manually build a graph from the same source filter and connect each advertised pin one at a time.
Do not combine this focused test with a codec-pack change, Player reset, or broad registry cleanup.
If the retest returns a different specific HRESULT, diagnose that new failure as the next stage.

Actions that obscure the cause

registering every filter with the highest merit.

Technical references

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