Provided by: grfcodec_6.0.6-3_amd64 bug


     GRFCodec — A tool to convert a GRF file into graphics files and meta data, and vice versa.


     grfcodec [-sv] [-d | -e] [options] GRF‐file [Directory]

              <GRF‐File> denotes the .GRF file you want to work on, e.g. TRG1.GRF

              <Directory> is where the individual sprites should be saved. If omitted, they will
              default to a subdirectory called sprites/.


     -?          Display the help message.

     -e          Encode a GRF file. The GRF‐file to pass is the file where to encode to. The
                 source of the GRF‐file, i.e. the .nfo, will be looked for in
                 sprites/GRF‐file.nfo.  All graphics files will be searched for relative from the
                 location of the GRF‐file.

     -d          Decode a GRF file. The GRF‐file to pass is the file to decode. The result will
                 be in sprites/GRF‐file.nfo and sprites/GRF‐file.png.

     -s          Silences the progress output in interactive mode

     -v          Display the version.

     Options for decoding:

     -w num      Write spritesheets files with the given width (default 800, minimum 16)

     -h num      Split spritesheets when they reach this height (default no limit, minimum 16)

     -b num      Organize sprites in boxes of this size (default 16)

     -o ssf      Sets the format of generated spritesheets.  See -o ? for a list.

     -p pal      Use this palette instead of the default.  See -p ? for a list.

     -t          Disable decoding of plain text characters as strings.

     -x          Disable production of unquoted escape sequences.

     -xx         Disable production of both quoted and unquoted escape sequences.

                 This has the side effect of producing a version 6 .nfo, instead of a version 7

     -X          List sprite numbers in the image file in hex.

     Options for encoding:

     -c          Crop extraneous transparent blue from real sprites

     -u          Save uncompressed data (probably not a good idea)

     -q          Suppress warning messages

     -g num      Create a GRF file with the given container version. Valid versions are 1 and 2,
                 where the latter allows bigger sprites, larger sounds, and multiple zoom levels
                 and bit depths for the sprites.

     -n          Try both compression algorithms and use the most efficient. This might cause
                 trouble when loading the NewGRF in TTDPatch.

     Options for both encoding and decoding:

     -m num      Apply colour translation to all sprites except character‐glyphs.

     -M num      Apply colour translation to all sprites.

                 If both of these are specified, only the last is obeyed.  -m ? or -M ? for a
                 list of colour translations.


     The documentation in /usr/share/doc/grfcodec/


     GRFCodec was written by Josef Drexler.

     This manual page was written by Remko Bijker.


     GRFCodec is Copyright (C) 2000‐2005 by Josef Drexler <>

                                        February 24, 2012