Question

Hi
I am trying to get a video duration and insert in into the database with the video.
But now I am working with extracting video duration using ffmpeg.
I am working on this for past 1 week.
I am able to make this work in linux.
But in windows its just not able to print the duration.
Here is the code.

use strict;
use warnings;
use IPC::Open3;

my @list = glob('*.mp3 *.mp4 *.mpg *.aac *.midi *m3u *.mpa *.dat *.avi');

foreach my $song (@list){

print "$song \n";

my $filename = $song;

my %videoInfo = videoInfo($filename);
print "duration: " . $videoInfo{'duration'}. "\n";
print "durationsecs: " . $videoInfo{'durationsecs'}. "\n\n";

}

sub videoInfo {

# ffmpeg command

my $ffmpeg = 'C:\ffmpeg.exe';



my %finfo = (

              'duration'     => "00:00:00.00",
              'durationsecs'  => "0"
);

my $file = shift;



# escaping characters

$file =~ s/(\W)/$1/g;



open3( "nul", "nul", \*ERPH, "$ffmpeg -i $file" ) or die "can't run $ffmpeg\n";

my @res = <ERPH>;

foreach (@res) {



     #duration

    if (m!Duration: ([0-9][0-9]:[0-9][0-9]:[0-9][0-9].[0-9][0-9])!) {

        $finfo{'duration'} = $1;

    }

 }


my $tenths  = substr( $finfo{'duration'}, 9, 2 );


my $seconds = substr( $finfo{'duration'}, 6, 2 );

my $minutes = substr( $finfo{'duration'}, 3, 2 );

my $hours   = substr( $finfo{'duration'}, 0, 2 );

$finfo{'durationsecs'} = ( $tenths * .01 ) + $seconds + ( $minutes * 60 ) + ( $hours * 360 );

return %finfo;
}

I installed ffmpeg in C:\ and given the path.

ffmpeg is working fine and is displaying bitrate, codec etc etc ( Here I have removed it since I only need Duration) But its jus not printing any duration, Its just printing 00:00:00.00.

I suspect its the search problem in the array.

Please help me in getting through this..

Here is the ouput when I run ffmpeg from command prompt

C:\>ffmpeg.exe -i cisco1.flv
FFmpeg version Sherpya-r10707, Copyright (c) 2000-2007 Fabrice Bellard, et al.
libavutil version: 49.5.0
libavcodec version: 51.45.0
libavformat version: 51.14.0
built on Oct 11 2007 06:25:25, gcc: 4.2.1 [Sherpya]
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cisco1.flv':
Duration: 00:08:37.0, start: 0.000000, bitrate: 421 kb/s
Stream #0.0(und): Audio: mpeg4aac, 44100 Hz, stereo
Stream #0.1(und): Video: h264, yuv420p, 960x720, 29.97 fps(r)
Must supply at least one output file

Here you can see the duration is fine.

If I add a

print;

Statement in the above code below line

foreach (@res) {

It will display the same ffmpeg output

Answer 1

You match with:

if (m!Duration: ([0-9][0-9]:[0-9][0-9]:[0-9][0-9].[0-9][0-9])!) {

But the output is:

Duration: 00:08:37.0, start: 0.000000, bitrate: 421 kb/s

Notice that there is only one digit after the ..

Try:

if (m!Duration:\s+([0-9][0-9]:[0-9][0-9]:[0-9][0-9]\.[0-9][0-9]?)!) {

It will match if there is one or two digits after the . (and you should escape . in the regular expression, otherwise it matches any single character).

$ cat input
FFmpeg version Sherpya-r10707, Copyright (c) 2000-2007 Fabrice Bellard, et al.
libavutil version: 49.5.0
libavcodec version: 51.45.0
libavformat version: 51.14.0
built on Oct 11 2007 06:25:25, gcc: 4.2.1 [Sherpya]
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cisco1.flv':
Duration: 00:08:37.0, start: 0.000000, bitrate: 421 kb/s
Stream #0.0(und): Audio: mpeg4aac, 44100 Hz, stereo
Stream #0.1(und): Video: h264, yuv420p, 960x720, 29.97 fps(r)
Must supply at least one output file
$ cat input | perl -ne 'if (m!Duration:\s+([0-9][0-9]:[0-9][0-9]:[0-9][0-9]\.[0-9][0-9]?)!) { print $1, "\n"; }'
00:08:37.0