UNIX for Dummies Questions & Answers

I have UWIn version of Unix for Desktop.
I have a file (Subtitle file of a movie) with the following format

[00:00:01]
abc def ghi jkl
[00:00:10]
mno pqr stuv
[00:00:15]
uvw xyz

The subtitles are delayed about a min or few seconds more. I want to increase it to be as shown below:
[00:01:11]
abc def ghi jkl
[00:01:20]
mno pqr stuv
[00:01:25]
uvw xyz

Can you please let me know, how to increase the numbers within "[...]"

Thanks

Try...

Code:

$ cat file1
[00:00:01]
abc def ghi jkl
[00:00:10]
mno pqr stuv
[00:00:15]
uvw xyz

$ awk -F '[]:[]' '/^\[..:/{t=($2*60*60)+($3*60)+$4+s;$0=sprintf("[%02d:%02d:%02d]",t/60/60,t/60%60,t%60)}1' s=70 file1 > file2

$ cat file2
[00:01:11]
abc def ghi jkl
[00:01:20]
mno pqr stuv
[00:01:25]
uvw xyz

$

I appreciate your help, Ygor.

I'm trying to understand the command. I haven't touched unix for almost a year and my knowledge drained little bit. Besides I was new to Unix even 2 years ago.

I understood the following
-F is a field separator. But how come "[]:[]" is a separator.
/^\[..:/ - replacing the string that begins with "[..:"; ".." - 2 characters.
s=70 - initialized for 70 seconds.

Can you please explain the command.

"[]:[]" is a character set, see The AWK Manual - Regexp Operators and The AWK Manual - Field Separators

"/^\[..:/" Searches for lines that begin with "[..:" then executes the two commands within "{}". See The AWK Manual - Getting Started

"t=($2*60*60)+($3*60)+$4+s" This sets variable t to the new timestamp (in seconds). See The AWK Manual - Assignment Ops

"$0=sprintf("[%02d:%02d:%02d]",t/60/60,t/60%60,t%60)" Replaces current line with formatted timestamp. See The AWK Manual - Printf

Thank you very much