Image Manipulation ...

bsamson · April 21, 2008

Good Afternoon,

I found the following script which grabs a still image from an mjpeg video stream.

<?

// an IP address
$dest = "123.123.123.123";

if  ($_GET['view']=="1") {
    $view = ":1024"; 
    } elseif ($_GET['view']=="2") {
    $view = ":1025";
  }

$camurl="http://".$dest.$view."/img/video.mjpeg";

$boundary="\n--";

$f = fopen($camurl,"r");

if( ! $f ) {
//**** Failed opening the socket
if( function_exists( 'imagecreatetruecolor' ) && $img = imagecreatetruecolor( 320, 200 ) ) {
  // Display an image if we have GD
  $logo = imagecreatefromgif( "http://www.mydomain.com/backend/cams/img/errorConnecting.jpg" );
  $font = 1;

  header( "Content-type: image/jpeg" );

  imagealphablending( $img, 1 );
  imagealphablending( $logo, 1 );

  $img_w = imagesx( $img );
  $img_h = imagesy( $img );
  $logo_w = imagesx( $logo );
  $logo_h = imagesy( $logo );

  $bgc = imagecolorallocate( $img, 255, 255, 255 );
  $tc = imagecolorallocate( $img, 0, 0, 0 );
  $dc = imagecolorallocate( $img, 255, 0, 0 );

  imagefill( $img, 0, 0, $bgc );

  imagerectangle( $img, 0, 0, $img_w-1, $img_h-1, $dc );
  imageline( $img, 0, 0, $img_w-1, $img_h-1, $dc );
  imageline( $img, 0, $img_h-1, $img_w-1, 0, $dc );

  imagecopy( $img, $logo, 0, 0, 0, 0, $logo_w, $logo_h );
  imagestring( $img, $font, 5, $logo_h, "Error accessing $camurl", $tc );

  $date = time();
  $date = date( 'Ymd-His (O T)', $date );
  imagestring( $img, $font, 5, $logo_h + imagefontheight( $font ) + 1, $date, $tc );

  imagejpeg( $img );

  imagedestroy( $img );
  imagedestroy( $logo );
} else {
  // Display an error if we do not have GD
  header( "Content-type: text/html" );
  echo "<html><body><h1>Error</h1>Error accessing $camurl";
  echo "</body></html>";
}
} else {
//**** URL OK
// Transfer the image...
while (substr_count($r,"Content-Length") != 2) $r.=fread($f,512);

$start = strpos($r,'ÿ');
$end   = strpos($r,$boundary,$start)-1;
$frame = substr("$r",$start,$end - $start);

header("Content-type: image/jpeg");

echo $frame;
}

fclose($f);

?>

And this works well. However, we have 20+ cams and load time is of concern. What I am looking to do is to adjust this script to save the image NOT display it. Any assistance would be greatly appreciated! Thanks!

Zhadus · April 21, 2008

From that script it looks like $frame will be the final image. With that said, you should be able to output that variable to a file and that should accomplish what you are looking for.

jonsjava · April 21, 2008

<?

// an IP address
$dest = "123.123.123.123";
$save_directory = "/"; //change to the directory you want the files saved to
$filename = "image_".date("Y_m_d_Gi_s_u").".jpg";
if  ($_GET['view']=="1") {
    $view = ":1024"; 
    } elseif ($_GET['view']=="2") {
    $view = ":1025";
  }

$camurl="http://".$dest.$view."/img/video.mjpeg";

$boundary="\n--";

$f = fopen($camurl,"r");

if( ! $f ) {
//**** Failed opening the socket
if( function_exists( 'imagecreatetruecolor' ) && $img = imagecreatetruecolor( 320, 200 ) ) {
  // Display an image if we have GD
  $logo = imagecreatefromgif( "http://www.mydomain.com/backend/cams/img/errorConnecting.jpg" );
  $font = 1;

  header( "Content-type: image/jpeg" );

  imagealphablending( $img, 1 );
  imagealphablending( $logo, 1 );

  $img_w = imagesx( $img );
  $img_h = imagesy( $img );
  $logo_w = imagesx( $logo );
  $logo_h = imagesy( $logo );

  $bgc = imagecolorallocate( $img, 255, 255, 255 );
  $tc = imagecolorallocate( $img, 0, 0, 0 );
  $dc = imagecolorallocate( $img, 255, 0, 0 );

  imagefill( $img, 0, 0, $bgc );

  imagerectangle( $img, 0, 0, $img_w-1, $img_h-1, $dc );
  imageline( $img, 0, 0, $img_w-1, $img_h-1, $dc );
  imageline( $img, 0, $img_h-1, $img_w-1, 0, $dc );

  imagecopy( $img, $logo, 0, 0, 0, 0, $logo_w, $logo_h );
  imagestring( $img, $font, 5, $logo_h, "Error accessing $camurl", $tc );

  $date = time();
  $date = date( 'Ymd-His (O T)', $date );
  imagestring( $img, $font, 5, $logo_h + imagefontheight( $font ) + 1, $date, $tc );

  imagejpeg( $img );

  imagedestroy( $img );
  imagedestroy( $logo );
} else {
  // Display an error if we do not have GD
  header( "Content-type: text/html" );
  echo "<html><body><h1>Error</h1>Error accessing $camurl";
  echo "</body></html>";
}
} else {
//**** URL OK
// Transfer the image...
while (substr_count($r,"Content-Length") != 2) $r.=fread($f,512);

$start = strpos($r,'ÿ');
$end   = strpos($r,$boundary,$start)-1;
$frame = substr("$r",$start,$end - $start);

$new_file = fopen($save_directory.$file, "w+");
$write_file = fwrite($save_directory, $frame);
fclose($write_file);
/* header("Content-type: image/jpeg");

echo $frame;
*/
}

fclose($f);

?>

this should do it for you (I hope)

bsamson · April 21, 2008

Thanks for all the help! However, unfortunately the script doesn't want to save the image. Gives me errors indicating folder not found. Anyway, I also tried to use the IMAGEJPEG function ... but errors indicate that it doesn't recognize the format. Any one have any other suggestions as I am not yet too familiar with working with images in PHP. Thanks in advance!!!

-Brian

bsamson · April 21, 2008

Ok. Here's another approach ... (that isn't working) ...

<?php
$camurl="http://123.123.123.123:1024/img/video.mjpeg";

$boundary="\n--";

$f = fopen($camurl,"r") ;

   if(!$f)
   {
        //**** cannot open
        echo "error";
   }
    else
  {
        //**** URL OK
         while (substr_count($r,"Content-Length") != 2) $r.=fread($f,512);

         $start = strpos($r,'ÿ');
         $end   = strpos($r,$boundary,$start)-1;
         $frame = substr("$r",$start,$end - $start);

         header("Content-type: image/jpeg");
         imagejpeg($frame);
         
   }


fclose($f);

?>

This script displays this error:

Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/grabStill-2.php on line 29

Any suggestions? Im sorry, but I have not worked much w/ PHP & images. Again, it's all I want to do is to save the frame that is captured. That side of the script works. Thanks in advance for any assistance!

Best Regards,

Brian

craygo · April 21, 2008

change this

         header("Content-type: image/jpeg");
         imagejpeg($frame);

to something like this

// no need for header info if your not outputting the image to the browser
$folder = "path/to/image/folder/";
$filename = "somename.jpg";
imagejpeg($frame, $folder.$filename);

Make sure the folder exists.

Here is the info for imagejpeg()

http://us2.php.net/manual/en/function.imagejpeg.php

Ray

bsamson · April 21, 2008

Appreciate the advice. However, I believe the problem is the fact that the image stored in $frame is not jpeg? That is just a shot in the dark because of this error:

Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/grabStill-2.php on line 26

Any advise? Thanks in advance!

craygo · April 22, 2008

the image is above that.

<?php

// an IP address
$dest = "123.123.123.123";

if  ($_GET['view']=="1") {
    $view = ":1024"; 
    } elseif ($_GET['view']=="2") {
    $view = ":1025";
  }

$camurl="http://".$dest.$view."/img/video.mjpeg";

$boundary="\n--";

$f = fopen($camurl,"r");

if( ! $f ) {
//**** Failed opening the socket
if( function_exists( 'imagecreatetruecolor' ) && $img = imagecreatetruecolor( 320, 200 ) ) {
  // Display an image if we have GD
  $logo = imagecreatefromgif( "http://www.mydomain.com/backend/cams/img/errorConnecting.jpg" );
  $font = 1;

  header( "Content-type: image/jpeg" );

  imagealphablending( $img, 1 );
  imagealphablending( $logo, 1 );

  $img_w = imagesx( $img );
  $img_h = imagesy( $img );
  $logo_w = imagesx( $logo );
  $logo_h = imagesy( $logo );

  $bgc = imagecolorallocate( $img, 255, 255, 255 );
  $tc = imagecolorallocate( $img, 0, 0, 0 );
  $dc = imagecolorallocate( $img, 255, 0, 0 );

  imagefill( $img, 0, 0, $bgc );

  imagerectangle( $img, 0, 0, $img_w-1, $img_h-1, $dc );
  imageline( $img, 0, 0, $img_w-1, $img_h-1, $dc );
  imageline( $img, 0, $img_h-1, $img_w-1, 0, $dc );

  imagecopy( $img, $logo, 0, 0, 0, 0, $logo_w, $logo_h );
  imagestring( $img, $font, 5, $logo_h, "Error accessing $camurl", $tc );

  $date = time();
  $date = date( 'Ymd-His (O T)', $date );
  imagestring( $img, $font, 5, $logo_h + imagefontheight( $font ) + 1, $date, $tc );

  $folder = "path/to/image/folder/"; // Add this
  $filename = "somename.jpg";  // Add this
  imagejpeg( $img, $folder.$filename);  // Modify this

  imagedestroy( $img );
  imagedestroy( $logo );
} else {
  // Display an error if we do not have GD
  header( "Content-type: text/html" );
  echo "<html><body><h1>Error</h1>Error accessing $camurl";
  echo "</body></html>";
}
} else {
//**** URL OK
// Transfer the image...
while (substr_count($r,"Content-Length") != 2) $r.=fread($f,512);

$start = strpos($r,'ÿ');
$end   = strpos($r,$boundary,$start)-1;
$frame = substr("$r",$start,$end - $start);

header("Content-type: image/jpeg");

echo $frame;
}

fclose($f);

?>

bsamson · April 23, 2008

I am a bit lost ... what do you mean image is above that? Thanks in advance.

--Brian

craygo · April 23, 2008

You did imagejpeg($frame). $frame is not the image, the image is being created above that. I put notes next to the lines to change

  $folder = "path/to/image/folder/"; // Add this
  $filename = "somename.jpg";  // Add this
  imagejpeg( $img, $folder.$filename);  // Modify this

Ray

bsamson · April 25, 2008

Craygo,

Thanks for the help. However, that part of the script is only ran IF the URL (i.e.: http://11.11.11.11:1024/img/video.mjpeg) is not found. Here is the script w/ that section removed that I just tested and works:

<?php

$camurl="http://11.11.11.11:1024/img/video.mjpeg";

$boundary="\n--";

$f = fopen($camurl,"r");

//**** URL OK
// Transfer the image...
while (substr_count($r,"Content-Length") != 2) $r.=fread($f,512);

$start = strpos($r,'ÿ');
$end   = strpos($r,$boundary,$start)-1;
$frame = substr("$r",$start,$end - $start);

header("Content-type: image/jpeg");

echo $frame;

fclose($f);

?>

Thanks again for the help, any other suggestions?

Best,

Brian

craygo · April 25, 2008

so if I get this right $frame would be the image you are getting or just the name of the image?

bsamson · April 25, 2008

From what I understand $frame is the image. I have searched and searched for a solution. Thanks in advance for the assistance!

Best Regards,

Brian

craygo · April 25, 2008

Looking at the code, it looks like just the image name.

What do you get when you echo $frame.

Ray

bsamson · April 25, 2008

The image, without it nothing is displayed.

craygo · April 25, 2008

Can you right click on the page and get the page source and post the section for the image.

Ray

bsamson · April 25, 2008

I just copied the script to my personal domain. Here is the URL:

http://www.nnylocal.com/phpFreaks/grabStill-3.php. This is a working cam in one of our stores ...

Thanks!

Best Regards,

Brian Samson

craygo · April 25, 2008

Looks like you will have to do something like this.

<?php
$size = getimagesize($frame);
$img_src = imagecreatefromjpeg($frame);
$img_dst=imagecreatetruecolor($size[0],$size[1]);
imagecopyresampled($img_dst, $img_src, 0, 0, 0, 0, $size[0], $size[1], $size[0], $size[1]);
  $folder = "path/to/image/folder/"; 
  $filename = "somename.jpg";  
  imagejpeg($img_dst, $folder.$filename);   
  imagedestroy($img_dst);
?>

Other than that you would have to make a different page with the code above it in it and use grabStill-3.php as the source file.

So if you hade to do that just add

$frame = "grabStill-3.php";

to the top of the above code

Ray

bsamson · April 25, 2008

Ok ... using this script:

<?php

$camurl="http://111.111.111.111:1024/img/video.mjpeg";

$boundary="\n--";

$f = fopen($camurl,"r");

//**** URL OK
// Transfer the image...
while (substr_count($r,"Content-Length") != 2) $r.=fread($f,512);

$start = strpos($r,'ÿ');
$end   = strpos($r,$boundary,$start)-1;
$frame = substr("$r",$start,$end - $start);

  $size = getimagesize($frame);
  $img_src = imagecreatefromjpeg($frame);
  $img_dst=imagecreatetruecolor($size[0],$size[1]);
  imagecopyresampled($img_dst, $img_src, 0, 0, 0, 0, $size[0], $size[1], $size[0], $size[1]);
  $folder = "/home/nnyserve/www/backend/cams/scripts/stills/"; 
  $filename = "somename.jpg";  
  imagejpeg($img_dst, $folder.$filename);   
  imagedestroy($img_dst);

// header("Content-type: image/jpeg");
// echo $frame;

fclose($f);

?>

I received these errors:

Warning: getimagesize(ÿØÿÛ) [function.getimagesize]: failed to open stream: No such file or directory in /home/nnyserve/public_html/backend/cams/scripts/grabStill-4.php on line 17

Warning: imagecreatefromjpeg(ÿØÿÛ) [function.imagecreatefromjpeg]: failed to open stream: No such file or directory in /home/nnyserve/public_html/backend/cams/scripts/grabStill-4.php on line 18

Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in /home/nnyserve/public_html/backend/cams/scripts/grabStill-4.php on line 19

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/grabStill-4.php on line 20

Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/grabStill-4.php on line 23

Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/grabStill-4.php on line 24

LOL ... Thanks for all the help thus far Craygo ... but any other idea's?

Best regards,

Brian Samson

craygo · April 26, 2008

Well all it takes is the first one to error and the rest just follow. Did you try puting the code I did above in it's own file and call the script which creates the image

file called saveimages.php

<?php
  $frame = "grabStill-3.php"; 
  $size = getimagesize($frame);
  $img_src = imagecreatefromjpeg($frame);
  $img_dst=imagecreatetruecolor($size[0],$size[1]);
  imagecopyresampled($img_dst, $img_src, 0, 0, 0, 0, $size[0], $size[1], $size[0], $size[1]);
  $folder = "/home/nnyserve/www/backend/cams/scripts/stills/"; 
  $filename = "somename.jpg";  
  imagejpeg($img_dst, $folder.$filename);   
  imagedestroy($img_dst);
?>

Now instead of browsing to grabStill-3 go to saveimages.php

Ray

bsamson · April 27, 2008

Ok ... Just tried your scripts ... and now this:

Warning: imagecreatefromjpeg() [function.imagecreatefromjpeg]: gd-jpeg: JPEG library reports unrecoverable error: in /home/nnyserve/public_html/backend/cams/scripts/imgTest.php on line 4

Warning: imagecreatefromjpeg() [function.imagecreatefromjpeg]: 'grabStill-3.php' is not a valid JPEG file in /home/nnyserve/public_html/backend/cams/scripts/imgTest.php on line 4

Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in /home/nnyserve/public_html/backend/cams/scripts/imgTest.php on line 5

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/imgTest.php on line 6

Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/imgTest.php on line 9

Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/nnyserve/public_html/backend/cams/scripts/imgTest.php on line 10

I just dont understand PHP & images ... lol ... thanks for all your help though! Any other suggestions?? Thanks!

Best Regards,

Brian

bsamson · April 29, 2008

Anyone have any other suggestions? Thanks in advance!

Best Regards,

Brian

Sign In

Image Manipulation ...

Recommended Posts

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Link to comment

Share on other sites

Archived

Important Information