linux image grabber

[hard2hold]

I have used a program in winblows called image grabber II which just takes a screen shot of an video file at random intervals and save them as one larger jpg file. A sample file looks like this:



Is there a linux program that can perform the same options as it seems trying to use this in CentOS 5 with wine does not function properly.

[unchiujar]

Try xvidcap.

[Marsolin]

QFrameCatcher is another option.

[hard2hold]

Thanks for the responses. I could not get them to do what I wanted very well so I googled some and wrote up a script. Was able to use ffmpeg and montage to make something that works.



It still needs a lot of work as I am not the best script person around, but so far it is working. If anyone wants the workings of it, I am more the willing to share it.

[funchords]

I'm looking for the same thing, hard2hold -- I'd love to see your script. Don't worry about not being the best scripter, I'll take it -- warts and all.

> QFrameCatcher is another option.

Yes! Thank you, this worked great!

[hard2hold]

Warned u I am not a script guru:

#!/bin/bash
RANGE=`tcprobe -i $1 2>&1 |grep "length:" | awk '{ print $2 }'`
echo $RANGE
#
IMG1=`echo "$RANGE "*" 1/10" | bc`
echo $IMG1
IMG2=`echo "$RANGE "*" 2/10" | bc`
echo $IMG2
IMG3=`echo "$RANGE "*" 3/10" | bc`
echo $IMG3
IMG4=`echo "$RANGE "*" 4/10" | bc`
echo $IMG4
IMG5=`echo "$RANGE "*" 5/10" | bc`
echo $IMG5
IMG6=`echo "$RANGE "*" 6/10" | bc`
echo $IMG6
IMG7=`echo "$RANGE "*" 7/10" | bc`
echo $IMG7
IMG8=`echo "$RANGE "*" 8/10" | bc`
echo $IMG8
IMG9=`echo "$RANGE "*" 9/10" | bc`
echo $IMG9
ffmpeg -y -i $1 -f mjpeg -ss 100 -vframes 30 -an test0.jpg
ffmpeg -y -i $1 -f mjpeg -ss 200 -vframes 30 -an test1.jpg
ffmpeg -y -i $1 -f mjpeg -ss 300 -vframes 30 -an test2.jpg
ffmpeg -y -i $1 -f mjpeg -ss 400 -vframes 30 -an test3.jpg
fImpeg -y -i $1 -f mjpeg -ss 500 -vframes 30 -an test4.jpg
ffmpeg -y -i $1 -f mjpeg -ss 600 -vframes 30 -an test5.jpg
ffmpeg -y -i $1 -f mjpeg -ss 700 -vframes 30 -an test6.jpg
ffmpeg -y -i $1 -f mjpeg -ss 800 -vframes 30 -an test7.jpg
ffmpeg -y -i $1 -f mjpeg -ss 900 -vframes 30 -an test8.jpg
montage -label $1 -comment $1 -geometry 480x260+10+10 -bordercolor black *.jpg $2
rm test*

Been in LA for this week so I have not had a chance to mess with this.

[funchords]

Thanks! I'll give that a try and let you know!

[dalvin]

sorry to dig this up again but I was wondering if anyone managed to get a similar script like this to work.

I found a small php script that would generate a random thumb, but only a single thumbnail.

 <?php
 
// where ffmpeg is located, such as /usr/sbin/ffmpeg
$ffmpeg = 'ffmpeg';
 
// the input video file
$video  = dirname(__FILE__) . '/demo.mpg';
 
// where you'll save the image
$image  = dirname(__FILE__) . '/demo.jpg';
 
// default time to get the image
$second = 1;
 
// get the duration and a random place within that
$cmd = "$ffmpeg -i $video 2>&1";
if (preg_match('/Duration: ((\d+):(\d+):(\d+))/s', `$cmd`, $time)) {
    $total = ($time[2] * 3600) + ($time[3] * 60) + $time[4];
    $second = rand(1, ($total - 1));
}
 
// get the screenshot
$cmd = "$ffmpeg -i $video -deinterlace -an -ss $second -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg $image 2>&1";
$return = `$cmd`;
 
// done! 
echo 'done!';
 
?>  

I have no idea about php coding but I tried to modify it by adding "montage" command at the end of the script which ended up looking like this.

 <?php
 
// where ffmpeg is located, such as /usr/sbin/ffmpeg
$ffmpeg = 'ffmpeg';
$montage = 'montage';
// the input video file
$video  = dirname(__FILE__) . '/demo.wmv';
 
// where you'll save the image
$image  = dirname(__FILE__) . '/demo.jpg';
$image2  = dirname(__FILE__) . '/demo2.jpg';
$image3  = dirname(__FILE__) . '/demo3.jpg';
// default time to get the image
$second = 1;
 
// get the duration and a random place within that
$cmd = "$ffmpeg -i $video 2>&1";
if (preg_match('/Duration: ((\d+):(\d+):(\d+))/s', `$cmd`, $time)) {
    $total = ($time[2] * 3600) + ($time[3] * 60) + $time[4];
    $second = rand(1, ($total - 1));
}
$cmd = "$ffmpeg -i $video 2>&1";
if (preg_match('/Duration: ((\d+):(\d+):(\d+))/s', `$cmd`, $time)) {
    $total = ($time[2] * 3600) + ($time[3] * 60) + $time[4];
    $second2 = rand(1, ($total - 1));
}
$cmd = "$ffmpeg -i $video 2>&1";
if (preg_match('/Duration: ((\d+):(\d+):(\d+))/s', `$cmd`, $time)) {
    $total = ($time[2] * 3600) + ($time[3] * 60) + $time[4];
    $second3 = rand(1, ($total - 1));
}
 
// get the screenshot
$cmd = "$ffmpeg -i $video -deinterlace -an -ss $second -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg $image 2>&1";
$return = `$cmd`;
$cmd = "$ffmpeg -i $video -deinterlace -an -ss $second2 -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg $image2 2>&1";
$return = `$cmd`;
$cmd = "$ffmpeg -i $video -deinterlace -an -ss $second3 -t 00:01:01 -r 1 -y -vcodec mjpeg -f mjpeg $image3 2>&1";
$return = `$cmd`;
// done!
echo 'done!';
 
//montage the sets
$cmd = "montage -geometry 320x240+10+10 -bordercolor *.jpg screen.jpg";
$return = `$cmd`;
?>  

I only added those two extra lines just to see if I can produce three thumbs and the montage actually worked but I know this isn't the most efficient way to do it and I would probably kill the server if I tried doing say 9 thumbnails.


I would much rather a shell script that works or a far better example of what I was trying to achieve above.

Please help!

[LemonadeI]

Also try GFrameCatcher.