Getting thumbnail from movie - ios

Question

I have an app where I can shoot a video and then store it in core-data with some other data. It's stored as Transformable and "Store in External Record File". I get the video clip into an object called movie like this;
(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
movie = [info objectForKey:UIImagePickerControllerEditedImage];
Where I get stuck is to get a thumbnail from the movie. Using MPMoviePlayerController I have to have an URL, but the movie isn't stored anywhere yet. Plus finding the URL from the core-data is a mystery as well.
The closest help I can find here is Getting a thumbnail from a video url or data in iPhone SDK . But I get caught out on the URL issue.
I am saving it to core-data like this;
NSManagedObjectContext *context = [self managedObjectContext];
NSManagedObject *newMedia = [NSEntityDescriptioninsertNewObjectForEntityForName:#"Media" inManagedObjectContext:context];
[newMedia setValue:#"Video Clip " forKey:#"title"];
[newMedia setValue:now forKey:#"date_time"];
[newMedia setValue:movie forKey:#"movie"];
[newMedia setValue:[self generateImage] forKey:#"frame"];
I would be grateful if there is someone out there that can give me a pointer.

Answer 1

I used like this in my app
- (UIImage *)imageFromMovie:(NSURL *)movieURL atTime:(NSTimeInterval)time {
// set up the movie player
MPMoviePlayerController *mp = [[MPMoviePlayerController alloc]
initWithContentURL:movieURL];
mp.shouldAutoplay = NO;
mp.initialPlaybackTime = time;
mp.currentPlaybackTime = time;
// get the thumbnail
UIImage *thumbnail = [mp thumbnailImageAtTime:time
timeOption:MPMovieTimeOptionNearestKeyFrame];
// clean up the movie player
[mp stop];
[mp release];
return(thumbnail);
}
used like
imageView.image = [self imageFromMovie:fileURL atTime:10.0];

Answer 2

To get thumbnail from movie...
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
if ([[info objectForKey:#"UIImagePickerControllerMediaType"] rangeOfString:#"movie"].location!=NSNotFound)
{
MPMoviePlayerController *theMovie = [[MPMoviePlayerController alloc] initWithContentURL:[info objectForKey:#"UIImagePickerControllerMediaURL"]];
theMovie.view.frame = self.view.bounds;
theMovie.controlStyle = MPMovieControlStyleNone;
theMovie.shouldAutoplay=NO;
UIImage *imgTemp = [theMovie thumbnailImageAtTime:0 timeOption:MPMovieTimeOptionExact];
}
}

Answer 3

You can get your movie URL like this and then use this URL to get thumbnail using MPMoviePlayerController.
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSURL * movieURL = [info valueForKey:UIImagePickerControllerMediaURL] ;
. .. .
.. ..
}