Run QGIS algorithms from outside of QGIS

For running QGIS commands from an external Python session on Windows.

Initializes the QGIS environment and calls the algorithm.

This involves a lot of round-tripping. Advice: Run the commands directly instead if you can (GDAL through subprocess, SNAP through gpt, GRASS7 via its native Python interface...).

python setup.py install

import logging
logging.getLogger('qgis_runalg').setLevel('INFO')

from qgis_runalg import qgis_runalg

qgis_runalg('otb:rescaleimage', args=[...])

Pro-tip: Get your algorithm call signature from the processing history.