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VFW_E_INVALID_FILE_FORMAT
Meaning
Windows documents VFW_E_INVALID_FILE_FORMAT as “The file format is invalid”. In practical terms, it is returned when DirectShow recognizes the file-loading path but determines that the file structure is invalid for the selected parser or source filter.
Where the failure belongs
This result belongs to DirectShow filter-graph processing. The relevant condition is that DirectShow recognizes the file-loading path but determines that the file structure is invalid for the selected parser or source filter.
Evidence to collect
- Capture 1: file length, signature bytes and parser CLSID.
- Capture 2: first offset or structure rejected by the source filter.
- Capture 3: download or storage integrity hash.
Likely causes
- Possible cause 1: container headers or indexes are malformed.
- Possible cause 2: file content does not match its extension or advertised media type.
- Possible cause 3: truncation or corruption damages required structural data.
Diagnostic sequence
- Confirm that the observed path matches this condition: DirectShow recognizes the file-loading path but determines that the file structure is invalid for the selected parser or source filter.
Practical scenario
A file has a valid-looking extension but a damaged container header; replacing the file resolves it.
Correct handling and retry
- Corrective action 1: validate the container with a format-specific tool.
- Corrective action 2: obtain a complete uncorrupted file.
- Corrective action 3: avoid forcing a parser solely from the file extension.
Retry guidance. Retry only after the file bytes, parser selection or source have changed.
Difference from nearby HRESULTs
VFW_E_UNKNOWN_FILE_TYPE means no media type is recognized, while it means a selected format path finds invalid structure.
Official Microsoft references
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