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Full Discussion: BASH: how to launch a program with parameters
Top Forums Shell Programming and Scripting BASH: how to launch a program with parameters Post 302175277 by TinCanFury on Thursday 13th of March 2008 02:18:41 PM
Old 03-13-2008
BASH: how to launch a program with parameters
Hi, I'm a pretty big fan of BASH scripting. I've got a bunch I use for random things and lately a couple issues have been plaguing me.

Both are somewhat related, in that they deal with filenames with spaces and "escaped" characters and with launching a program with command line arguements (which invariably include these filenames).

for instance. I have a bunch of MKV movies with embedded subtitles. I'd like to extract the subtitles into their own SRT file. so I've got this basic script written:

Code:
#!/bin/bash

MOVIE=$1
echo "Original Movie: $MOVIE"
SRTFILE=${MOVIE/%mkv/srt}
echo "srt File: $SRTFILE"

TRACK=`mkvinfo "$MOVIE" | grep subtitle -B3 | grep Track\ number\:\ | sed -e 's$
#echo "Track is $TRACK"

if [[ "$TRACK" -gt "0" ]]
then
        echo "Track is: $TRACK"
        mkvextract tracks $MOVIE ${TRACK}:$SRTFILE
else
        echo "No subtitle track!"
fi

which gives me
Quote:
$ ./subtitleextract.sh Ying\ Xiong\ \(Hero\).mkv
Original Movie: Ying Xiong (Hero).mkv
srt File: Ying Xiong (Hero).srt
Track is: 3

Error: Missing track ID in argument 'Xiong'.
it should be running
mkvextract tracks Ying\ Xiong\ \(Hero\).mkv 3:Ying\ Xiong\ \(Hero\).srt
but obviously isn't.

The other script I've got that I'd love to get working is one I wrote to combine a series of avi files using avidemux. to do this I wrote a script that takes the input files as the arguements, deduces the output file name and then because of avidemux's arguement procedure I have it create a set of strings that it needs to append to the call to avidemux for each file being added to the original. I have a similar problem with this script as well, but with many more arguements involved. What I've done with this one is have it echo the required command to run which I can then copy and paste and it works fine, but it would be much nicer if I could get it to actually *launch* said command.

phew, hopefully someone that knows how to solve this bothered to read through this long post, and to you sir, I thank and congratulate you, especially if you have an answer to my troubles!

thanks!
 

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LEARN ABOUT SUSE

gst-complete

gst-complete-0.8(1)						   User Commands					       gst-complete-0.8(1)

NAME

       gst-complete-0.8, gst-complete - perform bash completion for gst-launch command lines

SYNOPSIS

       complete -Cgst-complete-0.8 gst-launch

       gst-complete [--gst-list-mm] [--gst-mm=string] [--print]

DESCRIPTION

       gst-complete-0.8 enables bash to provide context-sensitive tab completion for gst-launch command lines. See gst-launch(1) for the syntax of
       gst-launch command lines.

       You must have a version of bash that supports programmable completion. Such versions of bash provide the complete built-in command.

       gst-complete is a wrapper script that runs the latest installed version of gst-complete-X.X. For example, if both gst-complete-0.7 and gst-
       complete-0.8 are installed on your system, gst-complete runs gst-complete-0.8.

OPTIONS

       The following options are supported by gst-complete-0.8 and gst-complete:

       --help	       Display detailed usage message. You can also use -? to specify this option.

       The following options are supported by gst-complete only:

       --gst-list-mm   List found major/minor versions. This option displays the versions that are available.

       --gst-mm=string Force  major/minor  version.  This  option  enables you to specify a specific version to run, if you do not want to run the
		       default version.

       --print	       Print wrapped command line. This option displays the command that will be run, and then runs the command.

EXAMPLES

       Example 1: Generating the Registry of Available Plugins by Running gst-compprep

       Run the following command in your .bash_profile or other appropriate place:

       example% complete -C gst-complete-0.8 gst-launch

       Example 2: Running the Wrapper Script and Displaying the Command Name

       example% gst-complete --print
       /usr/bin/gst-complete-0.8

FILES

       The following files are used by this application:

       /usr/bin/gst-complete-0.Executable for bash completion for gst-launch

       /usr/bin/gst-complete   Wrapper script that runs the latest installed version of gst-complete-X.X

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-media		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |External			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gst-compprep(1), gst-feedback(1), gst-inspect(1), gst-launch(1), gst-launch-ext(1), gst-md5sum(1), gst-register(1), gst-thumbnail(1),  gst-
       typefind(1), gst-xmlinspect(1), gst-xmllaunch(1), gstreamer-properties(1), libgstreamer-0.8(3), libgstgetbits(3)

NOTES

       Original man page written by the GStreamer team at http://gstreamer.net/.

       Updated by Brian Cameron, Sun Microsystems Inc., 2004.

SunOS 5.10							    14 Oct 2004 					       gst-complete-0.8(1)
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