siril - Man Page

image processing tool for astronomy and others


Siril GUI
siril <file>             Start Siril with file.
  Siril CLI
siril-cli [-i conf_file] [-f] [-v] [-h] [-p] [-d working_directory] [-s script_file] [image_file_to_open]


Siril is an image processing tool specially tailored for noise reduction and improving the signal/noise ratio of an image from multiple captures, as required in astronomy. Siril can align, stack and enhance pictures from various file formats, even image sequences (movies and SER files). It makes use of OpenMP, supports all the cameras supported by libraw, and carries out its calculations in a high precision 32-bit floating point engine.



Starts Siril with configuration file which path is given in conf_file


(or --format) Prints all supported image input formats, depending on the libraries detected at compile-time


(or --version) Prints program name and version and exits


(or --help) Short usage help


Starts Siril without the graphical user interface and use the named pipes to accept commands and print logs and status information. On POSIX systems, the named pipes are created in /tmp/ and /tmp/siril_commands.out


(or --directory) Setting argument in cwd


(or --script) Starts Siril without the graphical user interface and run a script instead. Scripts are text files that contain a list of commands to be executed sequentially. In these files, lines starting with a # are considered as comments.


Open an image or sequence file right after start-up



User preferences. Overridden by the -i option.


The stylesheet used to change colours of the graphical user interface. This is useful for personalisation or if a GTK theme is incompatible with some coloured elements of Siril.


Vincent Hourdin <debian-siril at>
Cyril Richard <cyril at>

Referenced By

The man page siril-cli(1) is an alias of siril(1).

January 2020 siril 1.0