objective c - AVPlayer got the metadata but not playing -

i'm trying simple application, purpose listening audio stream (aac 64 kbps). i'm using avplayer apple avfoundation has follow :

viewcontroller.m

#import "viewcontroller.h" @interface viewcontroller () @end  @implementation viewcontroller @synthesize playeritem, player;  - (void)viewdidload {     [super viewdidload]; }  - (void) viewwillappear:(bool)animated{     [super viewwillappear:animated];     playeritem = [avplayeritem playeritemwithurl:[nsurl urlwithstring:@"http://stream.myjungly.fr/myjungly2"]];     [playeritem addobserver:self forkeypath:@"timedmetadata" options:nskeyvalueobservingoptionnew context:nil];      player = [avplayer playerwithplayeritem:playeritem];     [player play];      nslog(@"player item error : %@", playeritem.error.description);     nslog(@"player error : %@", player.error.description); }  - (void) observevalueforkeypath:(nsstring*)keypath ofobject:(id)object                      change:(nsdictionary*)change context:(void*)context {      if ([keypath isequaltostring:@"timedmetadata"])     {         avplayeritem* _playeritem = object;         (avmetadataitem* metadata in _playeritem.timedmetadata)         {             nslog(@"\nkey: %@\nkeyspace: %@\ncommonkey: %@\nvalue: %@", [metadata.key description], metadata.keyspace, metadata.commonkey, metadata.stringvalue);         }     } }  @end 

my object player , playeritem strong properties :

viewcontroller.h

@interface viewcontroller : uiviewcontroller  @property (nonatomic, strong) avplayeritem* playeritem; @property (nonatomic, strong) avplayer* player;  @end 

the key value observer working great, here log :

2013-05-14 11:18:03.725 musicavplayer[6494:907] player item error : (null) 2013-05-14 11:18:03.728 musicavplayer[6494:907] player error : (null) 2013-05-14 11:18:08.140 musicavplayer[6494:907]  key: title keyspace: comn commonkey: title value: alabama shakes - mine 

but audio not played, i've go no sound ! idea why ?

edit: @ questions :

no sound coming avplayer

avaudioplayer, no sound

avaudioplayer not playing sound

that's why i'm using strong property, guess problem not arc related

i found problem : iphone in silent mode ... no sound can go out on speaker, the sound played when using head phone.

but i've got new question : how can play sound on speaker when phone in silent mode ? (like official music application)

edit : ... , answer there : play sound on iphone in silent mode