// The following example shows how you can get an asset to represent the first video in the Saved Photos Album.ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];// Enumerate just the photos and videos group by using ALAssetsGroupSavedPhotos.[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {// Within the group enumeration block, filter to enumerate just videos.[group setAssetsFilter:[ALAssetsFilter allVideos]];// For this example, we‘re only interested in the first item.[group enumerateAssetsAtIndexes:[NSIndexSet indexSetWithIndex:0]options:0usingBlock:^(ALAsset *alAsset, NSUInteger index, BOOL *innerStop) {// The end of the enumeration is signaled by asset == nil.if (alAsset) {ALAssetRepresentation *representation = [alAsset defaultRepresentation];NSURL *url = [representation url];AVAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];// Do something interesting with the AV asset.}}];}failureBlock: ^(NSError *error) {// Typically you should handle an error more gracefully than this.NSLog(@"No groups");}];[library release];

[MHImagePickerMutilSelector showInViewController:self];