Section: User Commands (1)
Updated: April 2016
tracker-extract - Extract metadata from a file.
tracker extract FILE
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.
- -v, --verbosity=<LEVEL>
This sets the log verbosity for the extractor process.
The possible LEVEL options are:
- Show EVERYTHING, from debug messages to errors.
- Show enough detail to understand what is happening.
- Show an overview of what is going on
- 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.
- Using command line to extract metadata from a file:
$ tracker extract /path/to/some/file.mp3
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/.
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/.
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/