how to get a snapshot using php for dahua SD49225T-HN

wozzzzza · Dec 3, 2017

trying to write a php script that refreshes every second and displays the image that the SD49225T-HN camera is seeing in your web browser but its not working.
if i put in internet explorer
http://User:Passwd@xxx.xxx.xxx.xxx/cgi-bin/snapshot.cgi
all i get is an error saying windows cannot find it.
yet if i put it in chrome it works.
how do i make a php script return the image of the camera??

xco · Dec 4, 2017

Internet explorer disables the user

assword function by default.
try wget http://User:Passwd@xxx.xxx.xxx.xxx/cgi-bin/snapshot.cgi if on linux
or
invoke-webrequest http://User:Passwd@xxx.xxx.xxx.xxx/cgi-bin/snapshot.cgi in powershell on windows
to verify the cgi is serving the picture.

wozzzzza · Dec 4, 2017

yes the picture actually works with that url, but now i have come up with the code below after a day of stuffing around.
but now i get from the script that it is "Unable to decode image"
what am i doing wrong here??

PHP:

<?php

$user = "admin";
$pass = "xxxxxxxx";
$basic_auth=false;



$url="http://192.168.xxx.xxx/cgi-bin/snapshot.cgi?";

$options=build_options($url,$user,$pass,$debug=1,$basic_auth);

# execute the curl call
$response=curl_call($options);

header("Content-type: image/jpeg");
print imagejpeg($response);
        
              
# ===== Functions ====
function catchGet($opt){
  if(isset($_GET[$opt])&&trim($_GET[$opt])!==''){
    return trim($_GET[$opt]);
  }else{
    return false;
  }
}

function build_options($url,$user,$pass,$debug,$basic_auth){
  $options = array(
          CURLOPT_URL            => $url,
          CURLOPT_BINARYTRANSFER => true,
          CURLOPT_USERPWD        => $user . ":" . $pass,
          CURLOPT_RETURNTRANSFER => true,
  );
  # auth method
  if($basic_auth){
    $auth_header='Basic '.base64_encode("$user:$pass");
    $options[CURLOPT_HTTPHEADER]=[$auth_header];
  }else{
    $options[CURLOPT_HTTPAUTH]=CURLAUTH_DIGEST;
  }
  # debug headers
  if($debug){
    $options[CURLOPT_HEADER]=true;
    $options[CURLOPT_VERBOSE]=true;
  }
  return $options;
}

function curl_call($options){
  $ch = curl_init();
  curl_setopt_array( $ch, $options);

  try {
    $raw_response  = curl_exec( $ch );
    // validate CURL status
    if(curl_errno($ch)){
        throw new Exception(curl_error($ch), 500);
    }
    // validate HTTP status code (user/password credential issues)
    $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    if ($status_code != 200)
        throw new Exception("Response with Status Code [" . $status_code . "].", 500);
  } catch(Exception $ex) {
      throw new Exception($ex);
  } finally {
      curl_close($ch);
      return $raw_response;
  }
}

?>

Go3Team · Dec 4, 2017

Here's what I was using to change image size:

Code:

<!DOCTYPE html>
<html>
<head>
<title>Dog Dog Cam</title>
</head>
<body>
<?php
$orig = file_get_contents("http://10.0.0.49/cgi-bin/snapshot.cgi");
$im = imagecreatefromstring($orig);
$now = date("U");
$newfile = "/tmp/$now.jpg";
file_put_contents($newfile, $orig);
$newnew = imagecreatetruecolor(960,540);
imagecopyresized($newnew, $im, 0, 0, 0, 0, 960, 540, 1920, 1080);
$newnewfile = "/var/www/tires/dogdog/images/$now-r.jpg";
imagejpeg($newnew, $newnewfile);
imagedestroy($im);
imagedestroy($newnew);
echo "<img src=\"images/$now-r.jpg\">";
?>
</body>
</html>

Go3Team · Dec 4, 2017

Another way using curl:

Code:

<!DOCTYPE html>
<html>
<head>
<title>Dog Dog Cam</title>
</head>
<body>
<?php
$login = 'dookiehead';
$password = 'putsomestuffhereithink';
$url = 'http://10.0.0.65/cgi-bin/snapshot.cgi';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, "$login:$password");
$result = curl_exec($ch);
curl_close($ch);
$im = imagecreatefromstring($result);
$now = date("U");
$newfile = "/tmp/$now.jpg";
file_put_contents($newfile, $orig);
$newnew = imagecreatetruecolor(960,540);
imagecopyresized($newnew, $im, 0, 0, 0, 0, 960, 540, 1920, 1080);
$newnewfile = "/var/www/tires/dogdog/images/$now-r.jpg";
imagejpeg($newnew, $newnewfile);
imagedestroy($im);
imagedestroy($newnew);
echo "<img src=\"images/$now-r.jpg\">";
?>
</body>
</html>
?>

wozzzzza · Dec 4, 2017

d00d your a legend, that works great, thanks for that.

Go3Team · Dec 4, 2017

You're welcome.

wozzzzza · Dec 4, 2017

that first script you put up there just gave me a black page but second one worked. i just have to modify it now to suit what i need to d.

Go3Team · Dec 4, 2017

wozzzzza said:
that first script you put up there just gave me a black page but second one worked. i just have to modify it now to suit what i need to d.

I realized the first one was for the older Dahua cams where you didn't have to authenticate to get the screenshot. The 2nd allows for digest authentication which the newer Dahua cams need. I originally used the script so I could see how the dogs were doing while we were away. I shrunk the image to save bandwidth on mobile. Once you have the "$result", you can pretty much do anything with it.

Go3Team · Dec 4, 2017

This should auto refresh every 5 seconds. Change the number 5 in:

Code:

<meta http-equiv="refresh" content="5">

to however many seconds you need refreshed. 1 second may be a little optimistic.

Code:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="refresh" content="5">
<title>Dog Dog Cam</title>
</head>
<body>
<?php
$login = 'user';
$password = 'password';
$url = 'http://10.0.0.65/cgi-bin/snapshot.cgi';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, "$login:$password");
$result = curl_exec($ch);
curl_close($ch);
$im = imagecreatefromstring($result);
$now = date("U");
$newfile = "/tmp/$now.jpg";
file_put_contents($newfile, $orig);
$newnew = imagecreatetruecolor(960,540);
imagecopyresized($newnew, $im, 0, 0, 0, 0, 960, 540, 1920, 1080);
$newnewfile = "/var/www/tires/dogdog/images/$now-r.jpg";
imagejpeg($newnew, $newnewfile);
imagedestroy($im);
imagedestroy($newnew);
echo "<img src=\"images/$now-r.jpg\">";
?>
</body>
</html>

0blar · Dec 4, 2017

Hi
I try your php script but i have an error, it only display

Code:

"; ?>

on the page
I installed libcurl3 libcurl3-dev and php5-curl on a the web server.
The error maybe come from the last line :

Code:

echo "<img src=\"images/$now-r.jpg\">";

Can you help me to resolve it ?

I added :

Code:

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

and rename the script into .php instead of .html and get error:

Code:

Notice: Undefined variable: orig in /var/www/html/cam.php on line 22

and

Code:

Warning: imagejpeg(/var/www/html/images/1512431550-r.jpg): failed to open stream: Permission denied in /var/www/html/cam.php on line 26

Thanks

0blar · Dec 4, 2017

Here my script:

Code:

<?php
$login = 'admin';
$password = 'password';
$url = 'http://Cam_IP/cgi-bin/snapshot.cgi';
header("Content-type: image/jpg");
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, "$login:$password");
$result = curl_exec($ch);
curl_close($ch);
$im = imagecreatefromstring($result);
$now = date("U");
$newfile = "/tmp/$now.jpg";
file_put_contents($newfile, $now);
$newnew = imagecreatetruecolor(960,540);
imagecopyresized($newnew, $im, 0, 0, 0, 0, 960, 540, 1920, 1080);
$newnewfile = "/tmp/$now-r.jpg";
imagejpeg($newnew, $newnewfile);
imagedestroy($im);
imagedestroy($newnew);
echo "<img src=\"/tmp/$now-r.jpg\">";

?>

<!DOCTYPE html>
<HTML>
 <HEAD>
  <TITLE>Cam SnapShot</TITLE>
 </HEAD>

<BODY>
<img src="<?php echo $newnewfile; ?>" alt=""/>
</BODY>
</HTML>

Go3Team · Dec 5, 2017

0blar said:

Here my script:

Code:

<?php
$login = 'admin';
$password = 'password';
$url = 'http://Cam_IP/cgi-bin/snapshot.cgi';
header("Content-type: image/jpg");
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, "$login:$password");
$result = curl_exec($ch);
curl_close($ch);
$im = imagecreatefromstring($result);
$now = date("U");
$newfile = "/tmp/$now.jpg";
file_put_contents($newfile, $now);
$newnew = imagecreatetruecolor(960,540);
imagecopyresized($newnew, $im, 0, 0, 0, 0, 960, 540, 1920, 1080);
$newnewfile = "/tmp/$now-r.jpg";
imagejpeg($newnew, $newnewfile);
imagedestroy($im);
imagedestroy($newnew);
echo "<img src=\"/tmp/$now-r.jpg\">";

?>

<!DOCTYPE html>
<HTML>
 <HEAD>
  <TITLE>Cam SnapShot</TITLE>
 </HEAD>

<BODY>
<img src="<?php echo $newnewfile; ?>" alt=""/>
</BODY>
</HTML>

Take out these 2 lines, I realized they were from an older version that I copy pasted.

Code:

$newfile = "/tmp/$now.jpg";
file_put_contents($newfile, $now);

You're going to need write permissions in your folder

Code:

/var/www/html/images/

There's a few ways to do that, some easier than others. Check the security implications on the way you decide.

0blar · Dec 5, 2017

Hi
I made some modification on the script to get ride of that permission error
I also remove the 2 lines as you said.
Here my final script:

PHP:

<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

$login = 'admin';
$password = 'password';
$url = 'http://Cam_IP/cgi-bin/snapshot.cgi';
header("Content-type: image/jpg");
header ("Content-type: image/jpeg");
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, "$login:$password");
$result = curl_exec($ch);
curl_close($ch);
$im = imagecreatefromstring($result);
$now = date("U");
$newnew = imagecreatetruecolor(960,540);
imagecopyresized($newnew, $im, 0, 0, 0, 0, 960, 540, 1920, 1080);
$newnewfile = "/tmp/$now-r.jpg";
imagejpeg($newnew, $newnewfile);
imagedestroy($im);
imagedestroy($newnew);
?>
<!DOCTYPE html>
<HTML>
<HEAD>
<meta http-equiv="Content-type" content="text/html; charset=UTF-8"/>
<TITLE>Test Cam SnapShot</TITLE>
</HEAD>
<BODY>
<img src="<?php echo $newnewfile; ?>" alt=""/>
</BODY>
</HTML>

The picture is correctly recorded on /tmp.

The error i have now is the image cannot be displayed because it contains errors

Any idea ?

Go3Team · Dec 5, 2017

Are you using Apache? Apache isn't able to use files from /tmp unless you copy the file to /var/www/html/??? or create a symbolic link from /tmp/$file to /var/www/html/images/???. It's probably easier to create the symbolic link.

0blar · Dec 5, 2017

Thanks for your reply
I'm using nginx on a raspberry pi

I will try to sym link an i will let you know

Edit: i made ln -s /tmp/ /var/www/html/ but same issue
Watching the picture via web browser is ok

Go3Team · Dec 5, 2017

Can you see the images in the var/www/html/ folder?

0blar · Dec 5, 2017

When i created the symbolic link from /tmp to /var/www/html i get the tmp folder inside the /var/www/html/ folder
and i can see the files in
but cannot display the picture through the browser

0blar · Dec 5, 2017

I made some modification

PHP:

$newnewfile = "/var/www/html/images/$now-r.jpg";

and chown www-data:www-data /var/www/html/images/

I'm able to see the saved screenshot on the folder
but still have the same error displaying on browser

Go3Team · Dec 5, 2017

You can see the image file created in "/var/www/html/images"?

You'll want to:

If your *.php file is in /var/www/html:

Code:

echo "<img src=\"images/$now-r.jpg\">";

If the php file is in /var/www/html/images:

Code:

echo "<img src=\"$now-r.jpg\">";

how to get a snapshot using php for dahua SD49225T-HN

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