Hello,
In few words, my application is doing that :
1) My main view (MovieListController) has some video thumbnails and when I tap on one, it displays the moviePlayer (MoviePlayerViewController) :
MovieListController.h :
@interface MoviePlayerViewController : UIViewController <UITableViewDelegate>{
    UIView *viewForMovie;
    MPMoviePlayerController *player;
}
@property (nonatomic, retain) IBOutlet UIView *viewForMovie;
@property (nonatomic, retain) MPMoviePlayerController *player;
- (NSURL *)movieURL;
@end
MovieListController.m :
 MoviePlayerViewController *controllerTV = [[MoviePlayerViewController alloc] initWithNibName:@"MoviePlayerViewController" bundle:nil];
 controllerTV.delegate = self;
 controllerTV.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
 [self presentModalViewController: controllerTV animated: YES];
 [controllerTV release];
2) In my moviePlayer, I initialize the video I want to play
MoviePlayerViewController.m :
@implementation MoviePlayerViewController
@synthesize player;
@synthesize viewForMovie;
- (void)viewDidLoad {
  NSLog(@"start");
  [super viewDidLoad];
  self.player = [[MPMoviePlayerController alloc] init];
  self.player.view.frame = self.viewForMovie.bounds;
  self.player.view.autoresizingMask = 
  UIViewAutoresizingFlexibleWidth |
  UIViewAutoresizingFlexibleHeight;
  [self.viewForMovie addSubview:player.view];
  self.player.contentURL = [self movieURL];
    }
    - (void)dealloc {
     NSLog(@"dealloc TV");
     [player release];
     [viewForMovie release];
        [super dealloc];
    }
     -(NSURL *)movieURL
    {
     NSBundle *bundle = [NSBundle mainBundle];
      NSString *moviePath = 
      [bundle 
       pathForResource:@"FR_Tribord_Surf camp_100204" 
       ofType:@"mp4"];
      if (moviePath) {
       return [NSURL fileURLWithPath:moviePath];
      } else {
      return nil;
      }
     }
- It's working good, my movie is display
My problem :
When I go back to my main view :
- (void) returnToMap: (MoviePlayerViewController *) controller {
 [self dismissModalViewControllerAnimated: YES];
}
And I tap in a thumbnail to display again the moviePlayer (MoviePlayerViewController), I get a *Program received signal:  “EXC_BAD_ACCESS”.*
In my debugger I saw that it's stopping on the thread "main" :
//
//  main.m
//  MoviePlayer
//
//  Created by Eric Freeman on 3/27/10.
//  Copyright Apple Inc 2010. All rights reserved.
//
#import <UIKit/UIKit.h>
int main(int argc, char *argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    int retVal = UIApplicationMain(argc, argv, nil, nil); //EXC_BAD_ACCESS
    [pool release];
    return retVal;
}
If I comment self.player.contentURL = [self movieURL]; it's working, but when I let it, iI have this problem.
I read that it's due to null pointer or memory problem but I don't understand why it's working the first time and not the second time. I release my object in dealloc method.
Thanks for your help !
Bruno.