# Extract Metadata for Stream Filtering

To extract metadata for stream filtering

1. Call fpOpenStream() or fpOpenStreamEx2() to open a stream.
2. Call fpFilterStream() to filter the stream.
3. Call fpCloseStream() to close the input stream.
4. Declare a pointer to the KVSummaryInfoEx structure.
5. Call fpGetOLESummaryInfo() to extract the metadata.
6. Call fpFreeOLESummaryInfo() to free the memory allocated for metadata extraction.

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