run command & get output

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: runn command & get outut by VSarkiss (Monsignor) on Jan 12, 2002 at 21:13 UTC
This FAQ has been asked and answered many many times. Why can't I get the output of a command with system()? perlman:perlop on the use of backticks and/or `qx`. perlman:perlfunc on `system` Just try typing "command output" in the search box (at the top of every page) for over 100 writeups. HTH	[reply] [d/l] [select]
Re: runn command & get outut by archen (Pilgrim) on Jan 12, 2002 at 22:43 UTC
okay, to clarify this question (since a lot of people seem to be taking this the wrong way). oggenc ecodes files from wave files to ogg/vorbis format. As it does so it prints a basic status update (a spinner and the percent of the file done). My understanding is that he wants the status in REAL time somehow. `system` doesn't give anything back, and the backtic operator only gives output on the final status of what the program output (if memory serves me correctly - I've never tried to capture output of such a program). Now I don't know how this myself, but maybe my explanation will make things a tad bit more clear(?). Truth be told this might be going about this the wrong way entirely. You can for instance obtain an ogg/vorbis encoding .dll, and interface directly with the .dll instead of trying to capture the status of the command line. But as I said, I don't know how to approach your problem either.	[reply]
Re: Re: runn command & get outut by marauder (Novice) on Jan 12, 2002 at 22:46 UTC
thanks for clarifying things for me. i am going to try & find out how to interface to a DLL.	[reply]
Re: Re: Re: runn command & get outut by theorbtwo (Prior) on Jan 12, 2002 at 23:27 UTC
The easiest way, BTW, is probably using Inline::C or Inline::CPP. (Not that I have huge amounts of experince in the matter. Thanks, James Mastros, Just Another Perl Scribe	[reply]
Re: runn command & get outut by talexb (Chancellor) on Jan 12, 2002 at 21:09 UTC
You need to provide more information before we have any hope of being able to help you. How does `oggenc` announce its progress? Is there a result file that grows to a particular size? Does it always take 45 seconds? More effort, please. --t. alex "Excellent. Release the hounds." -- Monty Burns.	[reply] [d/l]
Re: Re: runn command & get outut by Anonymous Monk on Jan 12, 2002 at 21:17 UTC
the progress of oggenc.exe is output to the msdos screen as "encoding... 2%" and increases accordingly. the time it takes is not the same each time as this depends on file size cpu etc.	[reply]
Re: runn command & get outut by Anonymous Monk on Jan 12, 2002 at 22:03 UTC
I have been reading all the nodes re: getting output and am more confused now. All I want to do is store the output while the command is running so I can have a running progress stored in a variable. I will then use this to create a perl/tk progress bar rather than have a dos window. the program oggenc.exe. oggenc produces its output status to STDERR while it's running. I will also need to minimise the dos box or get rid of it somehow. maybe it isn't possible what I'm trying to do but I will continue resarching.	[reply]