Controllo volume AVPlayer

Question

Desidero creare un pulsante che silenzia l'audio da un AVPlayer.

Perché non posso utilizzare .volume con AVPlayer, solo con AVAudioPlayer? C'è un altro modo per cambiare il volume?

es music.volume = 0.0;

Grazie per le vostre risposte.

Answer 1

A partire dal iOS 7, semplicemente c tutti:

myAvPlayer.volume = 0; 

In caso contrario, si dovrà utilizzare la soluzione fastidioso setAudioMix. Sto rilevando il supporto per questo nella mia app come segue:

if ([mPlayer respondsToSelector:@selector(setVolume:)]) { 
    mPlayer.volume = 0.0; 
} else { 
    NSArray *audioTracks = mPlayerItem.asset.tracks; 

    // Mute all the audio tracks 
    NSMutableArray *allAudioParams = [NSMutableArray array]; 
    for (AVAssetTrack *track in audioTracks) { 
     AVMutableAudioMixInputParameters *audioInputParams =[AVMutableAudioMixInputParameters audioMixInputParameters]; 
     [audioInputParams setVolume:0.0 atTime:kCMTimeZero]; 
     [audioInputParams setTrackID:[track trackID]]; 
     [allAudioParams addObject:audioInputParams]; 
    } 
    AVMutableAudioMix *audioZeroMix = [AVMutableAudioMix audioMix]; 
    [audioZeroMix setInputParameters:allAudioParams]; 

    [mPlayerItem setAudioMix:audioZeroMix]; // Mute the player item 
} 

Answer 2

Ho usato sotto il codice per silenziare AVPlayer.

float volSet = 0 ; 
AVAsset *avAsset = [[avPlayer currentItem] asset] ; 
NSArray *audioTracks = [avAsset tracksWithMediaType:AVMediaTypeAudio] ; 

NSMutableArray *allAudioParams = [NSMutableArray array] ; 
for(AVAssetTrack *track in audioTracks){ 
AVMutableAudioMixInputParameters *audioInputParams = [AVMutableAudioMixInputParameters audioMixInputParameters] ; 
[audioInputParams setVolume:volSet atTime:kCMTimeZero] ; 
[audioInputParams setTrackID:[track trackID]] ; 
[allAudioParams addObject:audioInputParams]; 
} 
AVMutableAudioMix *audioVolMix = [AVMutableAudioMix audioMix] ; 
[audioVolMix setInputParameters:allAudioParams]; 
[[avPlayer currentItem] setAudioMix:audioVolMix]; 

Answer 3

modo migliore è come seguendo

AVAssetTrack* assetTrackAudio = [arrayTracks objectAtIndex:0]; 

    AVMutableAudioMixInputParameters* audioInputParams = [AVMutableAudioMixInputParameters audioMixInputParameters]; 
    [audioInputParams setVolume:currentVolume atTime:playerCursorStartPosition]; 
    [audioInputParams setTrackID:[assetTrackAudio trackID]]; 

    NSArray* audioParams = [NSArray arrayWithObject:audioInputParams]; 
    AVMutableAudioMix* audioMix = [AVMutableAudioMix audioMix]; 
    [audioMix setInputParameters:audioParams]; 

    AVPlayerItem* item = [player currentItem]; 
    [item setAudioMix:audioMix]; 

Answer 4

controlla questo link

apple documentation for muting audio

seguito è riportato il codice di

AVURLAsset *asset = [AVURLAsset URLAssetWithURL:[self myAssetURL] options:nil]; 
NSArray *audioTracks = [asset tracksWithMediaType:AVMediaTypeAudio]; 

// Mute all the audio tracks 
NSMutableArray *allAudioParams = [NSMutableArray array]; 
for (AVAssetTrack *track in audioTracks) { 
    AVMutableAudioMixInputParameters *audioInputParams =[AVMutableAudioMixInputParameters audioMixInputParameters]; 
    [audioInputParams setVolume:0.0 atTime:kCMTimeZero]; 
    [audioInputParams setTrackID:[track trackID]]; 
    [allAudioParams addObject:audioInputParams]; 
} 
AVMutableAudioMix *audioZeroMix = [AVMutableAudioMix audioMix]; 
[audioZeroMix setInputParameters:allAudioParams]; 

// Create a player item 
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:asset]; 
[playerItem setAudioMix:audioZeroMix]; // Mute the player item 

// Create a new Player, and set the player to use the player item 
// with the muted audio mix 
AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem]; 

// assign player object to an instance variable 
self.mPlayer = player; 

// play the muted audio 
[mPlayer play]; 

Answer 5

Come di iOS 7 v'è anche una proprietà muted su AVPlayer:

@property (nonatomic, getter=isMuted) BOOL muted NS_AVAILABLE(10_7, 7_0);