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From sebb <seb...@gmail.com>
Subject Re: Commons Exec not producing the same result as the command line
Date Wed, 14 Apr 2010 09:46:23 GMT
On 14/04/2010, Daniel Wamara <daolwin@hotmail.com> wrote:
> 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.

If the PATH is different, it may pick up a different application.

Do other Exec calls work OK?

Try creating a wrapper shell script with no parameters.
Call that interactively and from Exec.
Add debug echo statements as necessary to determine what is happening.

>  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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> >
> >
>
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