Using printf to modify scalars

[jussi]

Hi Gurus

I try to make an timecode generator and my problem is that using printf
I can get right format. But I can't use printf to modify scalars
format:

Here is what get so far:

------------- START ---------------

#!/usr/bin/perl -w
$time_seconds = 0;
$time_minutes = 0;
$time_hours = 10;




while (</tmp/*.jpg>)
{


$time_frames = $time_frames + 1 ;
if ($time_frames < 10 ) {
$time_frames = "0".$time_frames;
}
if ($time_frames == 25) {
$time_frames = 0;
$time_seconds = $time_seconds + 1;
}
if ($time_seconds == 60) {
$time_seconds = 0;
$time_minutes = $time_minutes + 1;
}
if ($time_seconds < 10 ) {
$time_seconds = "0".$time_seconds ;
}

if ($time_minutes == 60 ){
$time_minutes = 0 ;
$time_hours = $time_hours + 1;
}
if ($time_minutes < 10 ){
$time_minutes = "0".$time_minutes;
}

$timecode = (printf
"%02d:%02d:%02d:%02d\n",$time_hours,$time_minutes,$time_seconds,$time_frames);
print "Time Code is: $timecode\n";

--------------------------- END ------------------------------

Printf gives me right format, but $timecode is constant 1 (=succesfull
??):

10:00:00:01
Time Code is: 1
10:00:00:02
Time Code is: 1
10:00:00:03
Time Code is: 1
10:00:00:04
Time Code is: 1
10:00:00:05
Time Code is: 1
10:00:00:06
Time Code is: 1
10:00:00:07
Time Code is: 1
10:00:00:08
Time Code is: 1
10:00:00:09
Time Code is: 1
10:00:00:10
Time Code is: 1
10:00:00:11
Time Code is: 1
10:00:00:12
Time Code is: 1
10:00:00:13
Time Code is: 1
10:00:00:14
Time Code is: 1
10:00:00:15
Time Code is: 1
10:00:00:16
Time Code is: 1
10:00:00:17
Time Code is: 1
10:00:00:18
Time Code is: 1
10:00:00:19
Time Code is: 1
10:00:00:20
Time Code is: 1
10:00:00:21
Time Code is: 1
10:00:00:22


So I would like to get time code in 10:00:00:22 format so I can pas it
to bash script

Any help would be very appreciate
-Jussi

 

[Brian McCauley]

[ question about printf() ]

Please read the documentation of the printf() function. Make sure that
you read at least as far as halfway through the first sentence before
you give up and ask for help.

Note: in general if you have question about a specific
function/module/error message whatever it's more efficient for all
concerned to try looking it up in the manual before asking for help.

 

[jdamon]

$timecode = (printf
"%02d:%02d:%02d:%02d\n",$time_hours,$time_minutes,$time_seconds,$time_frames);
print "Time Code is: $timecode\n";

I don't know what your script is attempting to do ( as your times have
nothing to do with times of the files ) , but

a quick fix would be



$timecode = print sprintf
"%02d:%02d:%02d:%02d\n",$time_hours,$time_minutes,$time_seconds,$time_frames);

print "Time Code is: $timecode\n";


the sprintf will do your formatting...

-Jimi