Getting trimmed video file size from UIImagePickerController - xcode

Question

After selecting a video using UIImagePickerController I can get the video's file size from its
[defaultRepresentation size].
However, if I enable the picker's trimming option, [defaultRepresentation size] returns the same file size as the original untrimmed video.
Does anyone have a method for retrieving the trimmed video's file size?
Much appreciated...
Yes, I should have included some code. Me bad.
What I'm trying to achieve is have the user choose and trim an existing video, then upload the trimmed version. I would like to have the trimmed version's file size in order to populate the progress bar during the upload. I would also like the trimmed version's duration.
The calling method is:
-(IBAction)selectVideoPressed:(id)sender
{
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
UIImagePickerController *videoPicker = [[UIImagePickerController alloc] init];
[videoPicker setDelegate: self];
[videoPicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[videoPicker setMediaTypes:[NSArray arrayWithObjects:(NSString *)kUTTypeMovie, nil]];
[videoPicker setVideoQuality:vvi.videoQuality];
[videoPicker setAllowsEditing:YES];
[videoPicker setModalTransitionStyle:gTransitionStyle];
[self presentViewController:videoPicker animated:YES completion:Nil];
}
}
The delegate method which fires after the user has trimmed and pressed Choose is:
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[vvi setRawSourceVideoFileURL:[info objectForKey:UIImagePickerControllerMediaURL]];
[vvi setSourceVideoURL:[info objectForKey:UIImagePickerControllerReferenceURL]];
ALAssetsLibrary *assetLibrary = [[ALAssetsLibrary alloc] init];
ALAssetsLibraryAssetForURLResultBlock resultBlock = ^(ALAsset *myAsset)
{
// Video metrics info.
[vvi setVideoDuration:[myAsset valueForProperty:ALAssetPropertyDuration]];
[vvi setVideoOrientation:[myAsset valueForProperty:ALAssetPropertyOrientation]];
NSDate *videoDate = [myAsset valueForProperty:ALAssetPropertyDate];
[vvi setVideoDateString:[videoDate descriptionWithLocale:[NSLocale currentLocale]]];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:gShortDateFormat];
[vvi setShortVideoDateString:[dateFormatter stringFromDate:videoDate]];
ALAssetRepresentation *myAssetRepresentation = [myAsset defaultRepresentation];
[vvi setVideoAssetSize:[NSNumber numberWithLongLong:[myAssetRepresentation size]]];
NSLog(#"Duration:%#", vvi.videoDuration);
NSLog(#"Size:%#", vvi.videoAssetSize);
};
....
vvi is just my own custom class.
The two NSLog's return the duration and size of the original untrimmed video. The video pointed to with [vvi setRawSourceVideoFileURL:[info objectForKey:UIImagePickerControllerMediaURL]]; does return the properly trimmed video.
Thanks and much!

Answer 1

Something like this should take care finding the file size of a selected image or video returned from the UIImagePickerController
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSURL *videoUrl=(NSURL*)[info objectForKey:UIImagePickerControllerMediaURL];
//Error Container
NSError *attributesError;
NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:[videoUrl path] error:&attributesError];
NSNumber *fileSizeNumber = [fileAttributes objectForKey:NSFileSize];
long long fileSize = [fileSizeNumber longLongValue];
}