Added support for MicroVideoOffset

MicroVideoOffset is used by Google Motion Photos to indicate position of video in jpg

Author: tmp-hallenser

lib/PHPExif/Exif.php

@@ -59,6 +59,7 @@ class Exif
     const CONTENTIDENTIFIER     = 'contentIdentifier';
     const FRAMERATE             = 'framerate';
     const DURATION              = 'duration';
+    const MICROVIDEOOFFSET      = 'MicroVideoOffset';
 
     /**
      * The mapped EXIF data
@@ -1153,4 +1154,31 @@ public function getDuration()
 
             return $this->data[self::DURATION];
         }
+
+        /**
+         * Sets the duration value
+         *
+         * @param string $value
+         * @return \PHPExif\Exif
+         */
+        public function setMicroVideoOffset($value)
+        {
+            $this->data[self::MICROVIDEOOFFSET] = $value;
+
+            return $this;
+        }
+
+        /**
+         * Returns duration, if it exists
+         *
+         * @return string|boolean
+         */
+        public function getMicroVideoOffset()
+        {
+            if (!isset($this->data[self::MICROVIDEOOFFSET])) {
+                return false;
+            }
+
+            return $this->data[self::MICROVIDEOOFFSET];
+        }
 }

lib/PHPExif/Mapper/Exiftool.php

@@ -60,6 +60,7 @@ class Exiftool implements MapperInterface
     const LENS                     = 'ExifIFD:LensModel';
     const SUBJECT                  = 'XMP-dc:Subject';
     const CONTENTIDENTIFIER        = 'Apple:ContentIdentifier';
+    const MICROVIDEOOFFSET         = 'XMP-GCamera:MicroVideoOffset';
 
     const DATETIMEORIGINAL_QUICKTIME  = 'QuickTime:CreationDate';
     const IMAGEHEIGHT_VIDEO           = 'Composite:ImageSize';
@@ -135,6 +136,7 @@ class Exiftool implements MapperInterface
         self::FRAMERATE_QUICKTIME_3       => Exif::FRAMERATE,
         self::DURATION                    => Exif::DURATION,
         self::DURATION_QUICKTIME          => Exif::DURATION,
+        self::MICROVIDEOOFFSET            => Exif::MICROVIDEOOFFSET,
     );
 
     /**