[Gllug] Command line tool to find video dimensions?

Nix nix at esperi.org.uk
Sat Jun 2 17:45:09 UTC 2007

On 1 Jun 2007, salsaman at xs4all.nl uttered the following:
>     open MPLAYER, '$mplay_command -identify -v -vo null -ao null -frames 0
> \"$file\" 2>/dev/null </dev/null |';

You want an

or die "can't run mplayer: $!"

on the end of that.

You also probably don't want to throw stderr away, and the stdin
redirection is a bit of a waste of time.

You also also don't want to do $-interpolation inside single quotes, as
these suppress variable interpolation.

If you want to do complex redirections, look at IPC::Run, which lets you
do things like bidirectional piping, redirection through ptys, and so

`On a scale of one to ten of usefulness, BBC BASIC was several points ahead
 of the competition, scoring a relatively respectable zero.' --- Peter Corlett
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