Mute AVPlayer which is playing live-stream (m3u8 file)

I am using AVPlayer to play live stream (m3U8 file). It plays perfectly using AVPlayer but I am not able to mute it.

I dont want to mute full ios system, just want to mute the player. I am using following code to mute the audio.

NSMutableArray *allAudioParams = [NSMutableArray array];

for (AVPlayerItemTrack *track in _player.currentItem.tracks)

{

if ([track.assetTrack.mediaType isEqual:AVMediaTypeAudio])

{

AVMutableAudioMixInputParameters *audioInputParams = [AVMutableAudioMixInputParameters audioMixInputParameters];

[audioInputParams setVolume:0.0 atTime:kCMTimeZero];

[audioInputParams setTrackID:[track.assetTrack trackID]];

[allAudioParams addObject:audioInputParams];

}

}

AVMutableAudioMix *audioZeroMix = [AVMutableAudioMix audioMix];

[audioZeroMix setInputParameters:allAudioParams];

[[_player currentItem] setAudioMix:audioZeroMix];

With the same code I able to mute the local video files as well as progressive video urls which I am playing in same AVPlayer code.

(may be for live stream video , tracks available in AVPlayer instance can be set volume ZERO but next buffering tracks are fresh with volume, am i right or any other reasons?)

In Apple documentation it is written that AVAudioMix only supports file-based assets. But I am not getting any replacement for AVAudioMix for livestream-based assets.

Anybody have any idea on this issue. Any help on this is highly appreciable.