# filter

The filter sample program demonstrates the advanced functionality of the Filter API. It is composed of the following files:

- `filter.c`—command line interface
- `filtersupport.c`—contains core functionality, such as file filtering, stream filtering, metadata extraction, and format detection.
- `filtersupport.h`—structure and variable definitions

To run `filter`, type the following at the command line:

`filter [options] input_file output_file`

where:

`options` is one or more of the options listed in Options for the Filter Sample Program .

`input_file` is the full path and file name of the source document.

`output_file` is the full path and file name of the output file.

Options for the Filter Sample Program

Option | Description
--- | ---
`-i` | Extract metadata. See Extract Metadata.
`-c` | Run Filter in the same process as the calling application (in process). See Run Filter In Process.
`-e` | Run Filter in stream mode. See Filtering in Stream Mode.
`-h` | Extract headers and footers, as well as the body text. See fpInit() or fpInitWithLicenseData().
`-d` | Extract the file format information using the fpGetDocInfoFile() function.
`-mt` | Enable the memory trace system in error logs. The memory trace system reports memory leaks and memory overwrites in the log file. See Report Memory Errors. Error logs are not generated when in-process filtering is enabled.
`-mtN` | Disable the memory trace system in error logs. The memory trace system reports memory leaks and memory overwrites in the log file. See Report Memory Errors. Error logs are not generated when in-process filtering is enabled.
`-L` | Enable error logging. See Enable or Disable Error Logging. Error logs are not generated when in-process filtering is enabled.
`-LN` | Disable error logging. See Enable or Disable Error Logging. Error logs are not generated when in-process filtering is enabled.
`-AF` | Include the input file name in an error log. See Report the File Name in Stream Mode.
`-r` | Filter a container file and the subfiles in the container file to a single output file. This option uses the Container API, which is obsolete.
`-rm` | If you set this option, text that was deleted from a document with revision tracking enabled is extracted from the document and included in the filtered output. See Extract Deleted Text Marked by Tracked Changes.
`-x xmlconfigfile` | Filter an XML file by using customized extraction settings defined in the `kvxconfig.ini` file. If you do not enter the full path to the INI file, the program looks for the file in the current working directory. See Filter XML Files for more information.
`-z tempdirectory` | Specify a temporary directory where temporary files generated by the filtering process are stored. The default is the current working directory. On Windows systems, there is a 64 K size limit to the temporary directory. When the limit is reached, you must either create a new directory or delete the contents of the existing directory; otherwise, you might receive an error message.
`-ps password` | Specify a password to open a password-protected PST file. This option uses the Container API, which is obsolete.
`-pdfauto` | Specify that PDF files are output in a logical reading order. The PDF filter determines the paragraph direction (left-to-right or right-to-left) for each PDF page, and then sets the direction accordingly. See Filter PDF Files.
`-pdfltr` | Specify that PDF files are output in a logical reading order, and that the paragraph direction is left to right. See Filter PDF Files.
`-pdfrtl` | Specify that PDF files are output in a logical reading order, and that the paragraph direction is right to left. See Filter PDF Files.
`-pdfraw` | Specify that PDF files are output in an unstructured paragraph flow. This is the default option . If logical reading order is enabled, and you want to return to an unstructured paragraph flow, set this flag. See Filter PDF Files.
`-xmp` | Parse and return XMP metadata as path and value pairs, and include the original XMP packet. See fpGetXmpInfoFile() and fpGetXmpInfo().
`-xmpr` | Return XMP metadata as a raw XMP packet. See fpGetXmpInfoFile() and fpGetXmpInfo().
`-embeddedfont` | If you use this option, text that contains embedded fonts is not filtered from PDF documents. See fpFilterConfig().

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