AVQueuePlayer播放但没有声音 [英] AVQueuePlayer play but no sound

问题描述

- (void)playVideoInteractionNarration:(NSString *)vNarr{

[self pauseActionExecution];

NSURL *u = [NSURL fileURLWithPath:vNarr];
AVQueuePlayer *player = [[AVQueuePlayer alloc] initWithURL:u];
self.controller = [[AVPlayerViewController alloc]init];
controller.player = player;
controller.showsPlaybackControls=NO;

[controller.player setActionAtItemEnd:AVPlayerActionAtItemEndAdvance];

[[NSNotificationCenter defaultCenter]
 addObserver:self
 selector:@selector(videoNarrationFinishedPlaying:)                                                 
 name:AVPlayerItemDidPlayToEndTimeNotification
 object:player.currentItem];
//NSLog(@"MPVIDEOOOOOOO %@", player);

[controller.player setVolume:1.0];
[controller.player setMuted:NO];
[controller setViewInCurrentController];
[controller.player play];

}

- (void)videoNarrationFinishedPlaying:(NSNotification *) aNotification{

AVPlayerItem * item = [aNotification object];

[self.controller removeViewInCurrentController];
[[NSNotificationCenter defaultCenter] removeObserver:self
                                                name:AVPlayerItemDidPlayToEndTimeNotification
                                              object:item];

[self.controller.player pause];
[self.controller release];
[self playActionExecution];
}

视频开始和结束正确但没有声音
为什么？

the video start and finish correctly but NO sound why ?

推荐答案

正确的答案是：

  [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];

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