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jvs
n00b
Joined: 01 Apr 2004
Posts: 22
Location: Utrecht (NL)
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 Posted: Mon Feb 21, 2005 9:24 am Post subject: rename and re-numbering |
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hi,
I managed to rename filenames with spaces in it. However, the numbering part of the file starts at 117 (filename_117.jpg) till 347.
How can I reset this count starting at 001?
I tried using 'rename' or 'mv' but these file-utils don't seem to be able to do this.
thanks in advance,
jvs
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"Black holes are where God divided by zero" |
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teknomage1
Veteran
Joined: 05 Aug 2003
Posts: 1239
Location: Los Angeles, CA
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| Posted: Mon Feb 21, 2005 10:49 am Post subject: |
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Hi, I work with long strings of rendered frames all the time so I wrote this perl script to handle renumbering frames a while back. Maybe you could get some use out of it. | Code: | #!/usr/bin/perl -w
# take a directory, regex, starting number, ending number,
# and new starting number, and step and return a new sequence
# reseq dir '(filename.)(\d+)(\.jpg)' 48 96 24 1
$usage = 'reseq directory regex start end newStart step \n reseq dir \'(filename.)(\d+)(\.jpg)\' 48 96 24 1\n';
$dir = shift() or die "$usage";
$regex = shift() or die "$usage";
$start_num = shift() or die "$usage";
$end_num = shift() or die "$usage";
$new_start_num = shift() or die "$usage";
$step = shift() or die "$usage";
sub match_pad {
my $old_num = shift();
my $target_num = shift();
my $num_length = length($old_num);
return sprintf("%.*d", $num_length, $target_num);
}
opendir(DIR, $dir) or die "Couldn't open $dir, $!\n";
@files = sort(readdir(DIR));
$counter = 0;
foreach $file (@files) {
if ($file =~ /$regex/) {
my $old_number = $2;
if ($old_number <= $end_num && $old_number >= $start_num) {
my $old_name = $file;
my $new_position = $new_start_num + ($counter * $step);
$new_position = match_pad($old_number, $new_position);
$file =~ s/$regex/$1$new_position$3/;
print "Moving $old_name -> $file" . "\n";
`mv $old_name $file`;
$counter++;
}
}
} |
Okay so it looks arcane and perlish, but all you have to do is copy that whole mess to a file called 'reseq' in your path and make it executable, then you call it like it describes. The trickiest part is the regular expression argument. You have to use exactly 3 sets of parentheses and the second set has to be around the numeric portion. So to call this on your example files it'd look like | Code: | | reseq . '(filename_)(\d+)(\.jpg)' 117 347 1 1 |
The last number is the number to count by. And please be careful especially if your data is irreplaceable it's very easy to ruin lots of files with this script. |
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jvs
n00b
Joined: 01 Apr 2004
Posts: 22
Location: Utrecht (NL)
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| Posted: Mon Feb 21, 2005 2:53 pm Post subject: |
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well, thanks!
It does the job, so that's enough for me.
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