18 Sep
2008
18 Sep
'08
4:38 p.m.
SoX can do the job with some help. Here's a little Perl script to
figure out the speed scaling ratio based on the desired new length in
samples:
#!/usr/bin/perl
if(@ARGV != 3){ die "Usage: resize-audio.pl <in_file> <new_size>
<out_file>\n"; }
($in_file,$new_size,$out_file) = @ARGV;
$size = `sox $in_file -n stat 2>&1 |grep ^Samples |awk '{print \$3}'`;
$ratio = $size / $new_size;
print "$ratio\n";
`sox $in_file $out_file speed $ratio`;
In the couple tests I ran, it doesn't get to the *exact* new size
specified in samples, but pretty close -- I converted a file 12486
samples long to 3000 samples and ended up with a file with 3002 samples.
Jari Suominen wrote:
Tiago Tavares kirjoitti:
Can SoX do the job?
Nope. Speed shift takes in prosent or cents.
....j
On Thu, Sep 18, 2008 at 1:51 PM, Jari Suominen
<jari.suominen(a)helsinki.fi>wrote;wrote:
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Hello,
I'm trying to search a program (with no success) that could used for
speeding up an audio file to a certain length. I mean, I would have a
audio file that has 40000 samples, and I would need it to be 40010. And
the pitch of the file can/should change. All speed change stuff that I
have found will take semitones/cents/procents as a input parameter. I
would wan't to only input the exact length (in samples) that I need.
My purpose is basically make bunch of files that are loopable and have
equal length with each other.
Does this thing exist or do I have to make it myself?
Thanks!
..j
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