No se puede reproducir video con MPMoviePlayerViewController

Question

Creé un proyecto nuevo con el siguiente ViewController.m. Cuando ejecuto la aplicación, puedo ver un cuadro del origen/tamaño esperado (38, 100, 250, 163) pero es negro y no se reproduce video. Hay una extraña salida en Xcode:

2012-08-23 15:36:45.559 VideoTest1[11398:c07] [MPAVController] Autoplay: Disabling autoplay for pause 
2012-08-23 15:36:45.560 VideoTest1[11398:c07] [MPAVController] Autoplay: Disabling autoplay 
2012-08-23 15:37:18.186 VideoTest1[11398:c07] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0) 

Tenga en cuenta que el video se convierte con Videora iPhone Converter y juega bien en Xcode (lo que no es un problema de vídeo); el camino al video está bien porque cuando especifico demo-iPhone1 (que no existe) obtengo una excepción nula. Intenté en Simulator y en iPhone: siempre caja negra. ¿Algunas ideas?

#import "ViewController.h" 
#import <MediaPlayer/MediaPlayer.h> 

@interface ViewController() 

@end 

@implementation ViewController 
- (void)moviePlaybackComplete:(NSNotification *)notification 
{ 
    MPMoviePlayerController *moviePlayerController = [notification object]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self 
                name:MPMoviePlayerPlaybackDidFinishNotification 
                object:moviePlayerController]; 

    [moviePlayerController.view removeFromSuperview]; 
} 


- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    NSString *filepath = [[NSBundle mainBundle] pathForResource:@"demo-iPhone" ofType:@"mp4"]; 
    NSURL *fileURL = [NSURL fileURLWithPath:filepath]; 
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL]; 
    [[NSNotificationCenter defaultCenter] addObserver:self 
              selector:@selector(moviePlaybackComplete:) 
               name:MPMoviePlayerPlaybackDidFinishNotification 
               object:moviePlayerController]; 
    [moviePlayerController.view setFrame:CGRectMake(38, 
                100, 
                250, 
                163)]; 
    [self.view addSubview:moviePlayerController.view]; 
    [moviePlayerController play]; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
} 

@end 

Answer 1

que resolver un problema similar añadiendo playercontroller.moviePlayer.movieSourceType = MPMovieSourceTypeFile;

Answer 2

¿Utiliza ARC? Si es así, debes retener el MPMoviePlayerController.

Agregar a su interfaz de

@property (nonatomic, strong) MPMoviePlayerController *controller; 

Comprobar última línea de viewDidLoad

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    NSString *filepath = [[NSBundle mainBundle] pathForResource:@"demo-iPhone" ofType:@"mp4"]; 
    NSURL *fileURL = [NSURL fileURLWithPath:filepath]; 
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL]; 
    [[NSNotificationCenter defaultCenter] addObserver:self 
              selector:@selector(moviePlaybackComplete:) 
              name:MPMoviePlayerPlaybackDidFinishNotification 
              object:moviePlayerController]; 
    [moviePlayerController.view setFrame:CGRectMake(38, 
               100, 
               250, 
               163)]; 
    [self.view addSubview:moviePlayerController.view]; 
    [moviePlayerController play]; 
    [self setController:moviePlayerController]; 
} 

Answer 3

Acabo de resolver un problema similar con esta línea de código. Los controladores del reproductor ahora se muestran y el video se reproduce perfectamente:

@property (nonatomic, strong) MPMoviePlayerController *moviePlayer; 
// 
@synthesize moviePlayer = _moviePlayer; 
// 
[self.moviePlayer prepareToPlay]; 

Modifique para adaptarse a su entorno.

Answer 4

Consulte también el formato de video. Seguí recibiendo este error con mi video de muestra .m4v (que descargué del sitio web de Apple). Eventualmente probé con un video diferente que era .mp4 y funcionó bien. Muchos de los errores aún aparecieron en mi consola.

2013-01-22 15:44:04.850 VideoTesting[4497:c07] [MPAVController] Autoplay: Likely to keep up or full buffer: 0 
2013-01-22 15:44:04.851 VideoTesting[4497:c07] [MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up. 
2013-01-22 15:44:04.853 VideoTesting[4497:c07] [MPAVController] Autoplay: Disabling autoplay for pause 
2013-01-22 15:44:04.853 VideoTesting[4497:c07] [MPAVController] Autoplay: Disabling autoplay 
2013-01-22 15:44:04.861 VideoTesting[4497:c07] [MPAVController] Autoplay: Enabling autoplay 

Sin embargo, el video se reprodujo.