add video duration attribute in Medium

android/src/main/kotlin/com/morbit/photogallery/PhotoGalleryPlugin.kt

@@ -63,6 +63,7 @@ class PhotoGalleryPlugin : FlutterPlugin, MethodCallHandler {
             MediaStore.Video.Media._ID,
             MediaStore.Video.Media.WIDTH,
             MediaStore.Video.Media.HEIGHT,
+            MediaStore.Video.Media.DURATION,
             MediaStore.Video.Media.DATE_TAKEN,
             MediaStore.Video.Media.DATE_MODIFIED
         )
@@ -580,12 +581,14 @@ class PhotoGalleryPlugin : FlutterPlugin, MethodCallHandler {
         val idColumn = cursor.getColumnIndex(MediaStore.Video.Media._ID)
         val widthColumn = cursor.getColumnIndex(MediaStore.Video.Media.WIDTH)
         val heightColumn = cursor.getColumnIndex(MediaStore.Video.Media.HEIGHT)
+        val durationColumn = cursor.getColumnIndex(MediaStore.Video.Media.DURATION)
         val dateTakenColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATE_TAKEN)
         val dateModifiedColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATE_MODIFIED)
 
         val id = cursor.getLong(idColumn)
         val width = cursor.getLong(widthColumn)
         val height = cursor.getLong(heightColumn)
+        val duration = cursor.getLong(durationColumn)
         var dateTaken: Long? = null
         if (cursor.getType(dateTakenColumn) == FIELD_TYPE_INTEGER) {
             dateTaken = cursor.getLong(dateTakenColumn)
@@ -600,6 +603,7 @@ class PhotoGalleryPlugin : FlutterPlugin, MethodCallHandler {
             "mediumType" to videoType,
             "width" to width,
             "height" to height,
+            "duration" to duration,
             "creationDate" to dateTaken,
             "modifiedDate" to dateModified
         )

ios/Classes/SwiftPhotoGalleryPlugin.swift

@@ -371,6 +371,7 @@ public class SwiftPhotoGalleryPlugin: NSObject, FlutterPlugin {
       "mediumType": toDartMediumType(value: asset.mediaType),
       "height": asset.pixelHeight,
       "width": asset.pixelWidth,
+      "duration": NSInteger(asset.duration * 1000),
       "creationDate": (asset.creationDate != nil) ? NSInteger(asset.creationDate!.timeIntervalSince1970) * 1000 : nil,
       "modifiedDate": (asset.modificationDate != nil) ? NSInteger(asset.modificationDate!.timeIntervalSince1970) * 1000 : nil
     ]

lib/src/models/medium.dart

@@ -17,6 +17,9 @@ class Medium {
   /// The medium height.
   final int height;
 
+  /// The duration of video
+  final int duration;
+
   /// The date at which the photo or video was taken.
   final DateTime creationDate;
 
@@ -28,6 +31,7 @@ class Medium {
     this.mediumType,
     this.width,
     this.height,
+    this.duration,
     this.creationDate,
     this.modifiedDate,
   });
@@ -38,6 +42,7 @@ class Medium {
         mediumType = jsonToMediumType(json["mediumType"]),
         width = json["width"],
         height = json["height"],
+        duration = json['duration'] ?? 0,
         creationDate = json['creationDate'] != null
             ? DateTime.fromMillisecondsSinceEpoch(json['creationDate'])
             : null,