


tcmodchain(1)                                       tcmodchain(1)


NAME
       tcmodchain - Query compatibily of transcode modules chains.

SYNOPSIS
       tcmodchain [ -m path ] [ -C ] [ -L ] [ -d verbosity ] [ -v ] module1
       module2

COPYRIGHT
       tcmodchain is Copyright (C) by Transcode Team

DESCRIPTION
       tcmodchain allow to inspect transcode(1) modules, as well as it's com-
       panion, tcmodinfo(1). While tcmodinfo(1) focus on single modules,
       tcmodchain is intended to help in exploring/experimenting module inter-
       actions.

OPTIONS
       -m path
              Look in Path instead of the compiled-in module path while trying
              to load a module.

       -C     Enable check mode.
              In check mode tcmodchain expects exactly two module identifiers.
              tcmodchain will check compatibilty between two given modules.
              Result will be logged out or not depending of verbosity level.
              Anyway, if two modules are compatible, tcmodchain will exit suc-
              cesfully; otherwise, tcmodchain will exit with error.
              see RETURN VALUES below.

       -L     Enable list mode.
              In list mode tcmodchain expects exactly two module identifiers,
              exactly one of which containing a wildcard.  tcmodchain will
              inspect all avalaible installed modules matching the wildcard
              and will print out module names that are compatible with the
              other given one. if at least one compatible module is found,
              tcmodchain will exit succesfully; otherwise, tcmodchain will
              exit with error.
              see RETURN VALUES below.


       -d verbosity
              Specify the verbosiness level to use, like transcode does.
              Default value is 1 (TC_INFO verbosiness).

       -v     Print version information and exit.

MODULE IDENTIFIERS
       tcmodchain identifies modules using a type:name naming scheme. Cur-
       rently, as in transcode 1.1.0, only encode and multiplex module types
       are supported. name can refer to the name of any avalaible transcode
       modules, using the same rules of tcmodinfo(1) -i option.  The wildcard
       character * is supported in the name section of module identifier.
       Wildcard meaning is `any of avalaible modules' and is honoured only
       when list mode (-L option) is used. Using wildcard character for both



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tcmodchain(1)                                       tcmodchain(1)


       module identifiers will lead to an error.


EXAMPLES
       $ tcmodchain -C encode:null multiplex:null -d 1

       [encode_null.so] v0.0.3 (2005-06-05) null (fake) A/V encoder
       [multiplex_null.so] v0.0.2 (2005-12-29) discard each encoded frame
       [tcmodchain] encode:null | multiplex:null [OK]
       [tcmodchain] module chain OK


       $ tcmodchain -L 'encode:*' multiplex:null

       copy
       faac
       lame
       lzo
       null
       x264
       xvid

       PLEASE NOTE that output of this example may vary depending of your
       installation.
       At least null and copy modules will be showed on your output.


       $ tcmodchain -L encode:null 'multiplex:*'

       avi
       null
       raw
       y4m


RETURN VALUES
       tcmodchain uses following return values:
        0  successfull
        1  bad parameter or command line option
        2  error while (un)loading a module
        3  given module pair isn't compatible
        4  error while looking for module(s)




AUTHORS
       tcmodchain was written by Francesco Romani
       <fromani@gmail.com> with contributions from many others.  See AUTHORS
       for details.

SEE ALSO
       transcode(1) tcmodinfo(1)




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