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From "Daniel Wamara" <daol...@hotmail.com>
Subject Re: Commons Exec not producing the same result as the command line
Date Wed, 14 Apr 2010 09:40:48 GMT
Very unlikely IMO because they both call an external process which has 
nothing to do with Java and if there was some kind of problem with the path, 
I think the external process would have thrown an error of some kind.

Regards,
Daniel W.

--------------------------------------------------
From: "sebb" <sebbaz@gmail.com>
Sent: Wednesday, April 14, 2010 11:36 AM
To: "Commons Users List" <user@commons.apache.org>
Subject: Re: Commons Exec not producing the same result as the command line

> On 14/04/2010, sebb <sebbaz@gmail.com> wrote:
>> On 14/04/2010, Daniel Wamara <daolwin@hotmail.com> wrote:
>>  > Thanks but I don't think this will help solve the problem as I can see 
>> in
>>  > the log that the command which is executed is the correct one and as 
>> said,
>>  > copy-pasting the command seen in the logs is producing a file 
>> completely
>>  > different than the one created by Commons Exec.
>>
>>
>> Then the two invocations are most likely using different classpaths at
>>  some point.
>
> ... I mean PATHs.
>
>>
>>  >  Regards,
>>  >  Daniel W.
>>  >
>>  >  --------------------------------------------------
>>  >  From: "sebb" <sebbaz@gmail.com>
>>  >  Sent: Wednesday, April 14, 2010 1:18 AM
>>  >  To: "Commons Users List" <user@commons.apache.org>
>>  >  Subject: Re: Commons Exec not producing the same result as the 
>> command line
>>  >
>>  >
>>  > >
>>  > > On 13/04/2010, Daniel Wamara <daolwin@hotmail.com> wrote:
>>  > >
>>  > > > Good evening all,
>>  > > >
>>  > > >  I am trying to call ffmpeg via the command exec in order to 
>> transcode
>>  > some files and the strange thing happening is that the files produced 
>> are
>>  > not the same as the one I can create when calling the same command via 
>> the
>>  > command line.
>>  > > >
>>  > > >  This is how I am calling fmpeg and I get a file with a particular

>> codec
>>  > in it (strangely not the right one) although launching in the command 
>> line
>>  > exactly what I have in the sb.toString() which is the command to be
>>  > executed, the file created has a correct codec. So to say, the same 
>> command
>>  > started via Exec and the one started via the command line have not the 
>> same
>>  > result. Anyone has an idea?
>>  > > >
>>  > > >  Thanks.
>>  > > >  Daniel Wamara
>>  > > >
>>  > > >  StringBuilder sb = new
>>  > StringBuilder("/home/ect/scripts/transcoding.sh ");
>>  > > >
>>  > > >  sb.append(" " + source.getAbsolutePath());
>>  > > >
>>  > > >  sb.append(" " + attributes.getCodec());
>>  > > >
>>  > > >  sb.append(" " +
>>  > String.valueOf(attributes.getSamplingRate().intValue()));
>>  > > >
>>  > > >  sb.append(" " + target.getAbsolutePath());
>>  > > >
>>  > > >
>>  > > >  logDebug("command --> " + sb.toString());
>>  > > >
>>  > > >
>>  > > >  CommandLine commandLine =
>>  > CommandLine.parse(sb.toString());
>>  > > >
>>  > >
>>  > > Why do you build up the command-line and then parse it?
>>  > >
>>  > > Much safer to add the arguments one at a time, see:
>>  > >
>>  > > http://commons.apache.org/exec/tutorial.html
>>  > >
>>  > > under the heading "Build the Command Line Incrementally"
>>  > >
>>  > >
>>  > >
>>  > > >  DefaultExecutor executor = new DefaultExecutor();
>>  > > >
>>  > > >  executor.execute(commandLine);
>>  > > >
>>  > > >
>>  > >
>>  > >
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>>  > >
>>  > >
>>  > >
>>  >
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>>  >
>>
>
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