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dcmdecap(1) OFFIS DCMTK dcmdecap(1) NAME dcmdecap - Extract encapsulated file from DICOM encapsulated storage object SYNOPSIS dcmdecap [options] dcmfile-in encfile-out DESCRIPTION The dcmdecap utility reads a DICOM file of one of the Encapsulated Storage SOP Classes (dcmfile-in), extracts the embedded document and writes it to an output file (encfile-out). Optionally a command can be executed after the creation of the output file. PARAMETERS dcmfile-in DICOM input filename ("-" for stdin) encfile-out Encapsulated document output filename ("-" for stdout) OPTIONS general options -h --help print this help text and exit --version print version information and exit --arguments print expanded command line arguments -q --quiet quiet mode, print no warnings and errors -v --verbose verbose mode, print processing details -d --debug debug mode, print debug information -ll --log-level [l]evel: string constant (fatal, error, warn, info, debug, trace) use level l for the logger -lc --log-config [f]ilename: string use config file f for the logger input options input file format: +f --read-file read file format or data set (default) +fo --read-file-only read file format only -f --read-dataset read data set without file meta information input transfer syntax: -t= --read-xfer-auto use TS recognition (default) -td --read-xfer-detect ignore TS specified in the file meta header -te --read-xfer-little read with explicit VR little endian TS -tb --read-xfer-big read with explicit VR big endian TS -ti --read-xfer-implicit read with implicit VR little endian TS parsing of odd-length attributes: +ao --accept-odd-length accept odd length attributes (default) +ae --assume-even-length assume real length is one byte larger handling of undefined length UN elements: +ui --enable-cp246 read undefined len UN as implicit VR (default) -ui --disable-cp246 read undefined len UN as explicit VR handling of defined length UN elements: -uc --retain-un retain elements as UN (default) +uc --convert-un convert to real VR if known automatic data correction: +dc --enable-correction enable automatic data correction (default) -dc --disable-correction disable automatic data correction bitstream format of deflated input: +bd --bitstream-deflated expect deflated bitstream (default) +bz --bitstream-zlib expect deflated zlib bitstream processing options execution options: -x --exec [c]ommand: string execute command c after document extraction NOTES Option --exec allows for the execution of a certain command line after the creation of the PDF document. The command line to be executed is passed to this option as a parameter. The specified command line may contain the placeholder '#f', which will be replaced by the output filename at run time. The specified command line is executed in the foreground, i.e. dcmde- cap will be blocked until the command terminates. LOGGING The level of logging output of the various command line tools and underly- ing libraries can be specified by the user. By default, only errors and warnings are written to the standard error stream. Using option --verbose also informational messages like processing details are reported. Option --debug can be used to get more details on the internal activity, e.g. for debugging purposes. Other logging levels can be selected using option --log-level. In --quiet mode only fatal errors are reported. In such very severe error events, the application will usually terminate. For more de- tails on the different logging levels, see documentation of module 'oflog'. In case the logging output should be written to file (optionally with log- file rotation), to syslog (Unix) or the event log (Windows) option --log- config can be used. This configuration file also allows for directing only certain messages to a particular output stream and for filtering certain messages based on the module or application where they are generated. An example configuration file is provided in <etcdir>/logger.cfg. EXIT CODES The dcmdecap utility uses the following exit codes when terminating. This enables the user to check for the reason why the application terminated. general EXITCODE_NO_ERROR 0 EXITCODE_COMMANDLINE_SYNTAX_ERROR 1 input file errors EXITCODE_CANNOT_READ_INPUT_FILE 20 EXITCODE_NO_INPUT_FILES 21 EXITCODE_INVALID_INPUT_FILE 22 output file errors EXITCODE_CANNOT_WRITE_OUTPUT_FILE 40 processing errors EXITCODE_EXEC_FAILED 91 COMMAND LINE All command line tools use the following notation for parameters: square brackets enclose optional values (0-1), three trailing dots indicate that multiple values are allowed (1-n), a combination of both means 0 to n val- ues. Command line options are distinguished from parameters by a leading '+' or '-' sign, respectively. Usually, order and position of command line options are arbitrary (i.e. they can appear anywhere). However, if options are mu- tually exclusive the rightmost appearance is used. This behavior conforms to the standard evaluation rules of common Unix shells. In addition, one or more command files can be specified using an '@' sign as a prefix to the filename (e.g. @command.txt). Such a command argument is replaced by the content of the corresponding text file (multiple white- spaces are treated as a single separator unless they appear between two quotation marks) prior to any further evaluation. Please note that a com- mand file cannot contain another command file. This simple but effective approach allows one to summarize common combinations of options/parameters and avoids longish and confusing command lines (an example is provided in file <datadir>/dumppat.txt). ENVIRONMENT The dcmdecap utility will attempt to load DICOM data dictionaries specified in the DCMDICTPATH environment variable. By default, i.e. if the DCMDICT- PATH environment variable is not set, the file <datadir>/dicom.dic will be loaded unless the dictionary is built into the application (default for Windows). The default behavior should be preferred and the DCMDICTPATH environment variable only used when alternative data dictionaries are required. The DCMDICTPATH environment variable has the same format as the Unix shell PATH variable in that a colon (':') separates entries. On Windows systems, a semicolon (';') is used as a separator. The data dictionary code will at- tempt to load each file specified in the DCMDICTPATH environment variable. It is an error if no data dictionary can be loaded. SEE ALSO dcmencap(1) COPYRIGHT Copyright (C) 2007-2025 by OFFIS e.V., Escherweg 2, 26121 Oldenburg, Ger- many. Version 3.7.0 Mon Dec 15 2025 dcmdecap(1)
NAME | SYNOPSIS | DESCRIPTION | PARAMETERS | OPTIONS | NOTES | LOGGING | EXIT CODES | COMMAND LINE | ENVIRONMENT | SEE ALSO | COPYRIGHT
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