LinuxQuestions.org - I created a launcher for a bash(sh) script but it won't run

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I created a launcher for a bash(sh) script but it won't run

I created a script to to pass two file names to ffmpeg in order to extract the audio from the video: The script works fine and I usually run it from a directory were I have a flv file I want to strip the audio from. It places the audio created in the same directory as the flv file. I wanted to be able to run it from the top panel in gnome 2 so I created a link and drug it to the panel. Now when I click on it it wont run. I get this error:

Quote:

Originally Posted by p3aul (Post 4703692)

Does that notice give the correct file name, even with an upper case "L" for "Link"? Does that file exist if you check for it in a terminal shell?

Quote:

the top panel in gnome 2 so I created a link and drug it to the panel

1) make the script.sh executable
2) cp script.sh /usr/local/bin/
3) Create a launcher that says : Exec=script.sh
3a) When the launcher / the executable works,
then an entry can be added to the panel.

.

I never paid any attention to that path! Maybe Ubuntu is choking on the name of the link. When I right-clicked my expresswv.sh file and chose create link that's the name it gave me, with the capital L but the full name of it was "Link to extractwv.sh" I wonder if that's all the error msg had room for or if i maybe should have renamed the link to just one word?

Well, I renamed the link and I didn't get the error msg but it didn't open the terminal window either.

Here is another one I have for temperature that I have placed under the Applications menu. It opens a terminal window and works just fine. I will list it and then mine for comparison: This the temperature converter. It is just sits in the home dir.

Code:

#!/bin/bash

echo "*** Converting between the different temperature scales ***"

echo "1. Convert Celsius temperature into Fahrenheit"

echo "2. Convert Fahrenheit temperatures into Celsius"

echo -n "Select your choice (1-2) : "

read choice

 

if [ $choice -eq 1 ]

then

        echo -n "Enter temperature (C) : "

        read tc

        # formula Tf=(9/5)*Tc+32

        tf=$(echo "scale=2;((9/5) * $tc) + 32" |bc)

        echo "$tc C = $tf F"



elif [ $choice -eq 2 ]

then

        echo -n "Enter temperature (F) : "

        read tf

        # formula Tc=(5/9)*(Tf-32)

        tc=$(echo "scale=2;(5/9)*($tf-32)"|bc)

        echo "$tf = $tc"

else

        echo "Please select 1 or 2 only"

        exit 1

fi

echo -n "

-->  Press any key to exit "

read echoice



exit 0

This is my audio extractor: I was told to put it in a directory I created call bin in the home dir so that it would be in the path statement.

Code:

#!/bin/sh

echo Enter full input file name;

read I

echo Enter full output file name;

read O

ffmpeg -i "$I" -vn -f wav "$O"

Knudfl:
I logged in as root so that I could copy the file extractwv.sh to user/bin/ like you said. I created a file called audible.sh with the code you gave me and converted it to a launcher by dragging it to the panel(thats the only way I know how to do it) I get no error msgs when I click on it, but it doesn't work either :(

Quote:

a file called audible.sh .. .. and converted it to a launcher
by dragging it to the panel

Not possible.

Please copy your scripts to /usr/local/bin/ :
1) chmod +x expresswv.sh
2) chmod +x audible.sh
3) sudo cp expresswv.sh /usr/local/bin/
4) sudo cp audible.sh /usr/local/bin/
... First then you can get a launcher to use the scripts.

Which OS are you using ? Like Ubuntu 12.04.
Which Desktop is it about ? KDE, Gnome 3, Gnome 2. Please specify.

A launcher is a short text file. Named a desktop entry : Name.desktop.
All Desktops have a tool to automatically create a launcher. (Gnome 3 : Don't know.)
Two examples are attached.
.

Hi

Don't have my laptop with me now, but just an observation:

Your scripts require the user to make input in a terminal. To make a shell script run in a terminal, doesn't one have to tell the launcher explicitly to run it in a terminal? Otherwise it just runs in the background, waiting for input, like the little android boy in "AI". I seem to remember in KDE anyway there is a check-box for "Run in Terminal" or something (in the Properties).

Just a thought.

j0nn0

# 7

That's right, the command in the desktop entry should then be e.g. :

xterm -exec audible.sh

Ok that worked, but it's not saving my output file to the current directory. Is there an option for that?

# 9

May be change : ffmpeg -i "$I" -vn -f wav "$O"

To : ffmpeg -i "$I" -vn -f wav "$O" > <path-to-"save"-directory>/
Like : ffmpeg -i "$I" -vn -f wav "$O" > /home/owner/folder1/

.

Quote:

Originally Posted by knudfl (Post 4704092)

# 9

May change : ffmpeg -i "$I" -vn -f wav "$O"

To : ffmpeg -i "$I" -vn -f wav "$O" > <path-to-"save"-directory>/
Like : ffmpeg -i "$I" -vn -f wav "$O" > /home/owner/folder1/

.

Ok then I would always have to save in same folder.Is there a way to stipulate the current folder?

hmmm...OK, I guess not

The current directory . Is one period ( . )

ffmpeg -i "$I" -vn -f wav "$O" > ./

Or just : ffmpeg -i "$I" -vn -f wav "$O" > .

.

Quote:

ffmpeg -i "$I" -vn -f wav "$O" > ./

Yeah that sounds good I take it the ">" means to output it to the current dir. What about the input? How will ffmpeg find the input file? Would < work for input like:

Code:

ffmpeg -i < ./ "$I" -vn -f wav "$O" > ./

Quote:

I take it the ">" means to output it to the current dir

No. ' > ' will redirect to any directory with your write permissions.

> . : The current directory. Repeat: the dot, period ( . ) is the current directory.
> /home/owner/folder1/ : Another directory.