in reply to Passing an in memory scalar to an external command as an argument

This may help: 
my $mp3 = <binary contents of an mp3 file already in memory>;

$pid = open(PLAY, "| ffmpeg -i pipe:0") or die "Couldn't fork: $!\n";
print PLAY $mp3;
close(PLAY) or die "Couldn't close: $!\n";

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Re^2: Passing an in memory scalar to an external command as an argument
by LanX (Saint) on Apr 08, 2015 at 19:07 UTC
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[d/l]
      Thank you, BINMODE added to fh PLAY
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Re^2: Passing an in memory scalar to an external command as an argument
by RonW (Parson) on Apr 08, 2015 at 20:55 UTC

    I would suggest:

    use IO::Pipe;
my $pipe = IO::Pipe->new();
$pipe->writer(qw(ffmpeg -i pipe:0));
print $pipe $mp3;

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    to avoid the shell being used to launch ffmpeg.

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[d/l]
      I like that solution. But I need to capture stdout also (so I am actually using open2 for this). Can I write and read using IO::Pipe? The docs look like it is one or the other.
[reply]

        It is possible, but open2 is easier:

        $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'ffmpeg', '-i', 'pipe:0');

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[d/l]
Re^2: Passing an in memory scalar to an external command as an argument
by Rodster001 (Pilgrim) on Apr 08, 2015 at 19:08 UTC
    That's what I was looking for, thank you sir
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