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Shutter speed in EXIF

13 posts from 6 voices

Started 1 year ago by berrald
Latest reply from Mya
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This topic is resolved

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berrald
Member

Hello,

Excellent theme, as usual…

Is there a way to display the shutter speed as a fraction (1/125 s and not 0,008 s) when the speed is below 1 second?

Hope you will understand my poor english…

Happy new year from France!

Posted 1 year ago #
Dude
Dude
Hey,
basically you'd need to convert it back (i.e. see http://www.enliteart.com/blog/2008/08/30/quick-shutter-speed-fix-for-wordpress-exif/ ) because wp automatically changes the speed to decimal values. You can find the code in flashlight\includes\helper-slideshow.php - search for following function:
```
function avia_exif_data($attachment_id = "")
```
It requires some fiddling with the php code.
Posted 1 year ago #
berrald
Member

Problem solved, thank you !

Posted 1 year ago #
Chris Beard

Glad that Dude could help :)

Posted 1 year ago #
JoeLamari
Member

I could use some help on where to include the php code for the shutter speed conversion.

Thanks in advance.

Joe

Posted 1 year ago #

berrald
Member

First, add this function in the file 'helper-slideshow.php' :

function decimal2fraction ($number)
{
    list ($whole, $numerator) = explode ('.', $number);
    $denominator = 1 . str_repeat (0, strlen ($numerator));
    $GCD = GCD ($numerator, $denominator);
    $numerator /= $GCD;

    $denominator /= $GCD;
    if($whole == 0)
        return sprintf ('1/%d', round($denominator/$numerator));
    return sprintf ('%d 1/%d',
        $whole, round($denominator/$numerator));
}

function GCD ($a, $b)
{
    while ( $b != 0)
      {
        $remainder = $a % $b;
        $a = $b;
        $b = $remainder;

      }
    return abs ($a);
}

Posted 1 year ago #

berrald
Member

Then, replace the line :

if(!empty($meta['shutter_speed'])) 		{	$exif['shutter_speed'] 		 = array(__('Shutter','avia_framework'), $meta['shutter_speed']);		}

by :

if(!empty($meta['shutter_speed']))		{
	if($meta['shutter_speed'] < 0.6)		{	$exif['shutter_speed'] 		 = array(__('Vitesse ','avia_framework'), decimal2fraction ($meta['shutter_speed']));	}
	else 									{	$exif['shutter_speed'] 		 = array(__('Vitesse ','avia_framework'), $meta['shutter_speed']);	}	}

It will call the function 'decimal2fraction' only if the shutter speed is below 0.6 seconds.

Posted 1 year ago #

berrald
Member

Ooops, sorry, the word 'Shutter' was translated in french in the above post…
Here is the correct version :

if(!empty($meta['shutter_speed']))		{
	if($meta['shutter_speed'] < 0.6)		{	$exif['shutter_speed'] 		 = array(__('Shutter','avia_framework'), decimal2fraction ($meta['shutter_speed']));	}
	else 									{	$exif['shutter_speed'] 		 = array(__('Shutter','avia_framework'), $meta['shutter_speed']);	}	}

Posted 1 year ago #

berrald
Member

If you want, you could then add the units for the exif values : 's' for seconds, 'mm' for millimeters and 'f/' for the aperture.
Replace the code (two occurences) :

if($exif['shutter_speed']) $meta .= "<li class='exif-shutter_speed'><span>".$exif['shutter_speed'][0].":</span> ".$exif['shutter_speed'][1]."</li>";
				if($exif['iso']) $meta .= "<li class='exif-iso'><span>".$exif['iso'][0].":</span> ".$exif['iso'][1]."</li>";
				if($exif['aperture']) $meta .= "<li class='exif-aperture'><span>".$exif['aperture'][0].":</span> ".$exif['aperture'][1]."</li>";
				if($exif['focal_length']) $meta .= "<li class='exif-focal_length'><span>".$exif['focal_length'][0].":</span> ".$exif['focal_length'][1]."</li>";

by :

if($exif['shutter_speed']) $meta .= "<li class='exif-shutter_speed'><span>".$exif['shutter_speed'][0].":</span> ".$exif['shutter_speed'][1]." s</li>";
				if($exif['iso']) $meta .= "<li class='exif-iso'><span>".$exif['iso'][0].":</span> ".$exif['iso'][1]."</li>";
				if($exif['aperture']) $meta .= "<li class='exif-aperture'><span>".$exif['aperture'][0].":</span> f/".$exif['aperture'][1]."</li>";
				if($exif['focal_length']) $meta .= "<li class='exif-focal_length'><span>".$exif['focal_length'][0].":</span> ".$exif['focal_length'][1]." mm</li>";

Posted 1 year ago #

berrald
Member

Here is an example of what you should get :
http://www.compostyl.fr/photo/ (Work in progress…)

Posted 1 year ago #
JoeLamari
Member

Hi Berrald,

Thank you so mush for your help. I will give it a try and will let you know how it goes.

I visited your site and like the look especially the front pages first picture!

Best
Joe

Posted 1 year ago #
xGSTQ
Member

I tried this MOD and I get an error in the function decimal2fraction

this is the error

Warning: Division by zero in /home/themes/flashlight/includes/helper-slideshow.php on line 742

this is line 742

return sprintf ('1/%d', round($denominator/$numerator));

Posted 10 months ago #
Mya

Hi xGSTQ,

It's possible the MOD you tried conflicts now since Flashlight has been updated. If you will start a new thread with your problem and we'll try to help you solve.

Regards,
Mya

Posted 10 months ago #