tracker-extract (1) Linux Manual Page

tracker-extract – Extract metadata from a file.

Synopsys

tracker extract FILE

Description

tracker extract reads the file provided and extracts any metadata it can from this file, then displays the metadata on standard output.

The metadata is displayed as a SPARQL update command, that can be run against a SPARQL endpoint to update its copy of the metadata.

The actual extraction is done by a separate process. This is done to isolate the calling process from any memory leaks or crashes in the libraries Tracker uses to extract metadata.

For more information see the libtracker-extract reference documentation.

Options

-v, –verbosity=<LEVEL>

This sets the log verbosity for the extractor process.

The possible LEVEL options are:

• debug – Show EVERYTHING, from debug messages to errors.

• detailed – Show enough detail to understand what is happening.

• minimal – Show an overview of what is going on

• errors – Show only warnings, criticals, errors or fatal events.

-o, –output-format=<FORMAT>

Choose which format to use to output results. Supported formats are sparql, turtle and json-ld.

Examples

Using command line to extract metadata from a file:

$ tracker extract /path/to/some/file.mp3

Environment

TRACKER_EXTRACTORS_DIR

This is the directory which tracker uses to load the shared libraries from (used for extracting metadata for specific file types). These are needed on each invocation of tracker-store. If unset it will default to the correct place. This is used mainly for testing purposes. The default location is /usr/lib/tracker-1.0/extract-modules/.

TRACKER_EXTRACTOR_RULES_DIR

This is the directory which tracker uses to load the rules files from. The rules files describe extractor modules and their supported MIME types. The default location is /usr/share/tracker/extract-rules/.

TRACKER_USE_CONFIG_FILES

Don’t use GSettings, instead use a config file similar to how settings were saved in 0.10.x. That is, a file which is much like an .ini file. These are saved to $HOME/.config/tracker/

See Also

tracker-store(1), tracker-sparql(1), tracker-stats(1), tracker-info(1).

/usr/lib/tracker-1.0/extract-modules/

/usr/share/tracker/extract-rules/