Converting files?

Marshalscienceguy · June 5, 2015

How do you turn a WEBP file

Into JPG, PNG, GIF and BMP files.

Those 3 are accepted on most websites but there is this one site that only does WEBP file and its very hard to convert. I generally save it in MSpaint to convert it but that does not always work. Is there another way to do it?

Acme · June 5, 2015

Lots of freeware for it out there. converting WEBP file @ Yahoo search

Sensei · June 5, 2015

On wikipedia there is mentioned that it's format developed by Google.
So I would try opening it in Chrome ("Amongst web browsers, Google Chrome and Opera natively support WebP."), then taking screen-shot, and saving to any file format should work..
This way wouldn't need to install anything at least.

Edited June 5, 2015 by Sensei

fiveworlds · June 5, 2015

You can do so with php using the imagick and gd libraries. Imagick I am using for psd and tiff files. You can download and install imagick from here http://www.imagemagick.org/script/binary-releases.php#windowsit also comes with commandline options ie. convert "image.webp" "image.jpg" so you could make a .exe or regedit to convert files

<?php
$filename='filename.bmp';
$outputfilename='filename.png';
function imagecreatefrombmp($filename)
{
//Ouverture du fichier en mode binaire
   if (! $f1 = fopen($filename,"rb")) return FALSE;

//1 : Chargement des ent?tes FICHIER
   $FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1,14));
   if ($FILE['file_type'] != 19778) return FALSE;

//2 : Chargement des ent?tes BMP
   $BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel'.
                 '/Vcompression/Vsize_bitmap/Vhoriz_resolution'.
                 '/Vvert_resolution/Vcolors_used/Vcolors_important', fread($f1,40));
   $BMP['colors'] = pow(2,$BMP['bits_per_pixel']);
   if ($BMP['size_bitmap'] == 0) $BMP['size_bitmap'] = $FILE['file_size'] - $FILE['bitmap_offset'];
   $BMP['bytes_per_pixel'] = $BMP['bits_per_pixel']/8;
   $BMP['bytes_per_pixel2'] = ceil($BMP['bytes_per_pixel']);
   $BMP['decal'] = ($BMP['width']*$BMP['bytes_per_pixel']/4);
   $BMP['decal'] -= floor($BMP['width']*$BMP['bytes_per_pixel']/4);
   $BMP['decal'] = 4-(4*$BMP['decal']);
   if ($BMP['decal'] == 4) $BMP['decal'] = 0;

//3 : Chargement des couleurs de la palette
   $PALETTE = array();
   if ($BMP['colors'] < 16777216)
   {
    $PALETTE = unpack('V'.$BMP['colors'], fread($f1,$BMP['colors']*4));
   }

//4 : Cr?ation de l'image
   $IMG = fread($f1,$BMP['size_bitmap']);
   $VIDE = chr(0);

   $res = imagecreatetruecolor($BMP['width'],$BMP['height']);
   $P = 0;
   $Y = $BMP['height']-1;
   while ($Y >= 0)
   {
    $X=0;
    while ($X < $BMP['width'])
    {
     if ($BMP['bits_per_pixel'] == 24)
        $COLOR = unpack("V",substr($IMG,$P,3).$VIDE);
     elseif ($BMP['bits_per_pixel'] == 16)
     {
        $COLOR = unpack("n",substr($IMG,$P,2));
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     elseif ($BMP['bits_per_pixel'] == 8)
     {
        $COLOR = unpack("n",$VIDE.substr($IMG,$P,1));
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     elseif ($BMP['bits_per_pixel'] == 4)
     {
        $COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
        if (($P*2)%2 == 0) $COLOR[1] = ($COLOR[1] >> 4) ; else $COLOR[1] = ($COLOR[1] & 0x0F);
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     elseif ($BMP['bits_per_pixel'] == 1)
     {
        $COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
        if     (($P*8)%8 == 0) $COLOR[1] =  $COLOR[1]        >>7;
        elseif (($P*8)%8 == 1) $COLOR[1] = ($COLOR[1] & 0x40)>>6;
        elseif (($P*8)%8 == 2) $COLOR[1] = ($COLOR[1] & 0x20)>>5;
        elseif (($P*8)%8 == 3) $COLOR[1] = ($COLOR[1] & 0x10)>>4;
        elseif (($P*8)%8 == 4) $COLOR[1] = ($COLOR[1] & 0x8)>>3;
        elseif (($P*8)%8 == 5) $COLOR[1] = ($COLOR[1] & 0x4)>>2;
        elseif (($P*8)%8 == 6) $COLOR[1] = ($COLOR[1] & 0x2)>>1;
        elseif (($P*8)%8 == 7) $COLOR[1] = ($COLOR[1] & 0x1);
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     else
        return FALSE;
     imagesetpixel($res,$X,$Y,$COLOR[1]);
     $X++;
     $P += $BMP['bytes_per_pixel'];
    }
    $Y--;
    $P+=$BMP['decal'];
   }

//Fermeture du fichier
   fclose($f1);

return $res;
}


switch(image_type_to_extension(exif_imagetype($filename),true)){
case ".png":
    $image = imagecreatefrompng($filename);break;
case ".gif":
    $image = imagecreatefromgif($filename);break;
case ".jpg":
    $image = imagecreatefromjpeg($filename);break;
case ".psd":
    $im = new Imagick($filename);
    $im->flattenImages();
    $im->setImageFormat('jpg');
    $im->writeImage('test.jpg');
    imagecreatefromjpeg('test.jpg');
    break;
case ".bmp":
    $image = imagecreatefrombmp($filename);break;
case ".tiff":
    $im = new Imagick($filename);
    $im->flattenImages();
    $im->setImageFormat('jpg');
    $im->writeImage('test.jpg');
    imagecreatefromjpeg('test.jpg');break;
case ".gd2":
    $image = imagecreatefromgd2($filename);break;
case ".webp":
    $image = imagecreatefromwebp($filename);break;
case ".wbmp":
    $image = imagecreatefromwbmp($filename);break;
case ".xbm":
    $image = imagecreatefromxbm($filename);break;
case ".xpm":
    $image = imagecreatefromxpm($filename);break;
}
if(isset($image)){
imagepng($image, 'recipies.png');
imagedestroy($image);
}
?>

Edited June 5, 2015 by fiveworlds

Science world · September 12, 2015

You can do so with php using the imagick and gd libraries. Imagick I am using for psd and tiff files. You can download and install imagick from here http://www.imagemagick.org/script/binary-releases.php#windowsit also comes with commandline options ie. convert "image.webp" "image.jpg" so you could make a .exe or regedit to convert files

<?php
$filename='filename.bmp';
$outputfilename='filename.png';
function imagecreatefrombmp($filename)
{
//Ouverture du fichier en mode binaire
   if (! $f1 = fopen($filename,"rb")) return FALSE;

//1 : Chargement des ent?tes FICHIER
   $FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1,14));
   if ($FILE['file_type'] != 19778) return FALSE;

//2 : Chargement des ent?tes BMP
   $BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel'.
                 '/Vcompression/Vsize_bitmap/Vhoriz_resolution'.
                 '/Vvert_resolution/Vcolors_used/Vcolors_important', fread($f1,40));
   $BMP['colors'] = pow(2,$BMP['bits_per_pixel']);
   if ($BMP['size_bitmap'] == 0) $BMP['size_bitmap'] = $FILE['file_size'] - $FILE['bitmap_offset'];
   $BMP['bytes_per_pixel'] = $BMP['bits_per_pixel']/8;
   $BMP['bytes_per_pixel2'] = ceil($BMP['bytes_per_pixel']);
   $BMP['decal'] = ($BMP['width']*$BMP['bytes_per_pixel']/4);
   $BMP['decal'] -= floor($BMP['width']*$BMP['bytes_per_pixel']/4);
   $BMP['decal'] = 4-(4*$BMP['decal']);
   if ($BMP['decal'] == 4) $BMP['decal'] = 0;

//3 : Chargement des couleurs de la palette
   $PALETTE = array();
   if ($BMP['colors'] < 16777216)
   {
    $PALETTE = unpack('V'.$BMP['colors'], fread($f1,$BMP['colors']*4));
   }

//4 : Cr?ation de l'image
   $IMG = fread($f1,$BMP['size_bitmap']);
   $VIDE = chr(0);

   $res = imagecreatetruecolor($BMP['width'],$BMP['height']);
   $P = 0;
   $Y = $BMP['height']-1;
   while ($Y >= 0)
   {
    $X=0;
    while ($X < $BMP['width'])
    {
     if ($BMP['bits_per_pixel'] == 24)
        $COLOR = unpack("V",substr($IMG,$P,3).$VIDE);
     elseif ($BMP['bits_per_pixel'] == 16)
     {
        $COLOR = unpack("n",substr($IMG,$P,2));
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     elseif ($BMP['bits_per_pixel'] == 8)
     {
        $COLOR = unpack("n",$VIDE.substr($IMG,$P,1));
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     elseif ($BMP['bits_per_pixel'] == 4)
     {
        $COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
        if (($P*2)%2 == 0) $COLOR[1] = ($COLOR[1] >> 4) ; else $COLOR[1] = ($COLOR[1] & 0x0F);
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     elseif ($BMP['bits_per_pixel'] == 1)
     {
        $COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
        if     (($P*8)%8 == 0) $COLOR[1] =  $COLOR[1]        >>7;
        elseif (($P*8)%8 == 1) $COLOR[1] = ($COLOR[1] & 0x40)>>6;
        elseif (($P*8)%8 == 2) $COLOR[1] = ($COLOR[1] & 0x20)>>5;
        elseif (($P*8)%8 == 3) $COLOR[1] = ($COLOR[1] & 0x10)>>4;
        elseif (($P*8)%8 == 4) $COLOR[1] = ($COLOR[1] & 0x8)>>3;
        elseif (($P*8)%8 == 5) $COLOR[1] = ($COLOR[1] & 0x4)>>2;
        elseif (($P*8)%8 == 6) $COLOR[1] = ($COLOR[1] & 0x2)>>1;
        elseif (($P*8)%8 == 7) $COLOR[1] = ($COLOR[1] & 0x1);
        $COLOR[1] = $PALETTE[$COLOR[1]+1];
     }
     else
        return FALSE;
     imagesetpixel($res,$X,$Y,$COLOR[1]);
     $X++;
     $P += $BMP['bytes_per_pixel'];
    }
    $Y--;
    $P+=$BMP['decal'];
   }

//Fermeture du fichier
   fclose($f1);

return $res;
}


switch(image_type_to_extension(exif_imagetype($filename),true)){
case ".png":
    $image = imagecreatefrompng($filename);break;
case ".gif":
    $image = imagecreatefromgif($filename);break;
case ".jpg":
    $image = imagecreatefromjpeg($filename);break;
case ".psd":
    $im = new Imagick($filename);
    $im->flattenImages();
    $im->setImageFormat('jpg');
    $im->writeImage('test.jpg');
    imagecreatefromjpeg('test.jpg');
    break;
case ".bmp":
    $image = imagecreatefrombmp($filename);break;
case ".tiff":
    $im = new Imagick($filename);
    $im->flattenImages();
    $im->setImageFormat('jpg');
    $im->writeImage('test.jpg');
    imagecreatefromjpeg('test.jpg');break;
case ".gd2":
    $image = imagecreatefromgd2($filename);break;
case ".webp":
    $image = imagecreatefromwebp($filename);break;
case ".wbmp":
    $image = imagecreatefromwbmp($filename);break;
case ".xbm":
    $image = imagecreatefromxbm($filename);break;
case ".xpm":
    $image = imagecreatefromxpm($filename);break;
}
if(isset($image)){
imagepng($image, 'recipies.png');
imagedestroy($image);
}
?>

Thank you so much:)

fiveworlds · September 13, 2015

I actually created a few executables to get around the need for installing imagemagick or the gd library.

https://github.com/davidmather/imagetobmp/blob/master/bin/Release/imagetobmp.exe?raw=true

https://github.com/davidmather/imagetoemf/blob/master/imagetoemf/bin/Debug/imagetoemf.exe?raw=true

https://github.com/davidmather/imagetoexif/blob/master/imagetoexif/bin/Debug/imagetoexif.exe?raw=true

https://github.com/davidmather/imagetogif/blob/master/imagetogif/bin/Debug/imagetogif.exe?raw=true

https://github.com/davidmather/imagetojpg/blob/master/imagetojpg/bin/Debug/imagetojpg.exe?raw=true

https://github.com/davidmather/imagetoicon/blob/master/imagetoicon/bin/Debug/imagetoicon.exe?raw=true

Which run as

<?php
exec(exename inputfilename outputfilename);
?>

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