如何在elcImagePickerController中获取视频的NSData？

- (void)elcImagePickerController:(ELCImagePickerController *)picker didFinishPickingMediaWithInfo:(NSArray *)info {
    for (NSDictionary *dict in info) {
        NSString *mediaType = [dict objectForKey:UIImagePickerControllerMediaType];
        if ([mediaType isEqualToString:@"public.movie"]) {
            NSURL *videoURL = [dict objectForKey:UIImagePickerControllerMediaURL];
            NSData *videoData = [NSData dataWithContentsOfURL:videoURL];
            
            // 在这里可以使用videoData进行后续的处理
        }
    }
}