I've a UIImagePickerController in video mode; after I finish recording video and I tap on "Use" button to accept the video I use this method -(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info and inside it i want save the video in camera roll and retrieve the first frame from the video to show it in UIImageView. The code that I use is the following:
NSString *tempFilePath = [[info objectForKey:UIImagePickerControllerMediaURL] path];
NSURL *url = [NSURL fileURLWithPath:tempFilePath];
MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
moviePlayer.shouldAutoplay = NO;
imageView.image = [moviePlayer thumbnailImageAtTime:0.0 timeOption:MPMovieTimeOptionNearestKeyFrame];
The problem is that if I add the method UISaveVideoAtPathToSavedPhotosAlbum the app crash.
UISaveVideoAtPathToSavedPhotosAlbum(tempFilePath, self, @selector(video:didFinishSavingWithError:contextInfo:), nil);
where tmpFilePath is the same that I used above.
Instead if I use only one of this operation (UISaveVideoAtPathToSavedPhotosAlbum or retrieve frame) all work fine !
The console report this error:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[NSInvocation invocationWithMethodSignature:]: method signature argument cannot be nil'
Any ideas ? Thanks...
