fix[image_picker_ios]: Prevent transcoding on video selection (#10559)

Fixes a severe performance regression where picking videos on iOS could take 10-30+ seconds. The delay was caused by PHPickerViewController defaulting to the Automatic asset representation mode, which triggered slow transcoding for formats like HEVC.

This change sets preferredAssetRepresentationMode to Current to provide the original file without conversion, significantly improving performance.

Fixes flutter/flutter#176355

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Author: okorohelijah

packages/image_picker/image_picker_ios/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.8.13+3
+
+* Fixes a performance regression on iOS where picking videos could cause a long delay due to transcoding. The picker is now configured to request the original asset to avoid conversion.
+
 ## 0.8.13+2
 
 * Updates to Pigeon 26.

packages/image_picker/image_picker_ios/example/ios/RunnerTests/ImagePickerPluginTests.m

@@ -701,4 +701,28 @@ - (void)testPickMultiVideoWithoutLimit {
   XCTAssertEqual(plugin.callContext.maxItemCount, 0);
 }
 
+- (void)testPickVideoSetsCurrentRepresentationMode API_AVAILABLE(ios(14)) {
+  id mockPickerViewController = OCMClassMock([PHPickerViewController class]);
+  OCMStub(ClassMethod([mockPickerViewController alloc])).andReturn(mockPickerViewController);
+  OCMExpect([mockPickerViewController
+                initWithConfiguration:[OCMArg checkWithBlock:^BOOL(PHPickerConfiguration *config) {
+                  return config.preferredAssetRepresentationMode ==
+                         PHPickerConfigurationAssetRepresentationModeCurrent;
+                }]])
+      .andReturn(mockPickerViewController);
+
+  FLTImagePickerPlugin *plugin = [[FLTImagePickerPlugin alloc] init];
+  id partialPlugin = OCMPartialMock(plugin);
+  id mockViewController = OCMClassMock([UIViewController class]);
+  OCMStub([partialPlugin viewControllerWithWindow:OCMOCK_ANY]).andReturn(mockViewController);
+
+  [plugin pickVideoWithSource:[FLTSourceSpecification makeWithType:FLTSourceTypeGallery
+                                                            camera:FLTSourceCameraRear]
+                  maxDuration:nil
+                   completion:^(NSString *_Nullable result, FlutterError *_Nullable error){
+                   }];
+
+  OCMVerifyAll(mockPickerViewController);
+}
+
 @end

packages/image_picker/image_picker_ios/ios/image_picker_ios/Sources/image_picker_ios/FLTImagePickerPlugin.m

@@ -99,6 +99,7 @@ - (void)launchPHPickerWithContext:(nonnull FLTImagePickerMethodCallContext *)con
   PHPickerConfiguration *config =
       [[PHPickerConfiguration alloc] initWithPhotoLibrary:PHPhotoLibrary.sharedPhotoLibrary];
   config.selectionLimit = context.maxItemCount;
+  config.preferredAssetRepresentationMode = PHPickerConfigurationAssetRepresentationModeCurrent;
   NSMutableArray<PHPickerFilter *> *filters = [[NSMutableArray alloc] init];
   if (context.includeImages) {
     [filters addObject:[PHPickerFilter imagesFilter]];

packages/image_picker/image_picker_ios/pubspec.yaml

@@ -2,7 +2,7 @@ name: image_picker_ios
 description: iOS implementation of the image_picker plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/image_picker/image_picker_ios
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+image_picker%22
-version: 0.8.13+2
+version: 0.8.13+3
 
 environment:
   sdk: ^3.9.0