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Re: filtering my own output

by RhetTbull (Curate)
on Sep 06, 2001 at 19:50 UTC ( #110602=note: print w/replies, xml ) Need Help??

in reply to filtering my own output

I recommend Filter::Handle. I think it will do exactly what you want. I used it for the very same purpose -- to log the output a script without changing print statements, etc. Here's a sample script.
#!/usr/local/bin/perl use warnings; use strict; use Filter::Handle qw/subs/; #open the logfile open (LOGFILE,">>test.log") || die "open: $!"; #set up a sub to filter our output #print @_ to LOGFILE then also print it to STDERR Filter \*STDERR, sub { local $_ = "@_"; print LOGFILE scalar(localtime), ": $_"; $_ +}; #test it out by printing something to STDERR print STDERR "hello world\n"; #turn off filtering UnFilter \*STDERR; close LOGFILE || die "close: $!";
When run, this produces the following output:
/home/rhet/misc> ./ hello world /home/rhet/misc> cat test.log Thu Sep 6 11:46:24 2001: hello world /home/rhet/misc>

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[Corion]: Hurr. Yesterday I played around with ffmpeg as a new toy and found its "scene" filter great - it detects scene changes. Now I could write a module that splits a given video on its cuts into different scenes. Except I have no use case for that :)
[Corion]: (and also, writing yet another FFmpeg module just to wrap system() and grep through its output isn't all that great ...)
[erix]: cut out advertisements from movies? :)

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