I am playing live streaming video in iPhone using AVPlayer. I want to switch off the volume of the player (programmatically). I tried this http://developer.apple.com/library/ios/#qa/qa1716/_index.html. But it is not working in my case.
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];
Please suggest any solution for this.
Thanks
You can use MPVolumeView class, available [here]. It has a slider for volume control, that works for HTTP Live Streams as well.(http://developer.apple.com/library/ios/#documentation/mediaplayer/reference/MPVolumeView_Class/Reference/Reference.html)
Related
I am trying to play a video which is stored on my device using the following code. The problem is that I am seeing nothing on the screen, just a white screen.
The value of filePath in this case is file:///var/mobile/Containers/Data/Application/0E87EF09-B87C-443F-9BFB-E9A68AC4A162/Documents/TMRecordedVideos/2015-07-25T18-57-19Z.mov
NSString *filePath = [self.video fileURL];
NSURL *fileUrl = [NSURL fileURLWithPath:filePath isDirectory:NO];
AVAsset *videoAsset = [AVAsset assetWithURL:fileUrl];
AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithAsset:videoAsset];
self.videoPlayer = [AVPlayer playerWithPlayerItem:playerItem];
self.videoPlayerLayer = [AVPlayerLayer playerLayerWithPlayer:self.videoPlayer];
[self.videoPlayerLayer setFrame:self.view.frame];
[self.view.layer addSublayer:self.videoPlayerLayer];
[self.videoPlayer play];
I am using AVPlayerLayer for playing video. I used the below code and it worked fine. The URL(in my case outputFileURL) is similar to your filePath.
AVPlayer *avPlayerq = [AVPlayer playerWithURL:outputFileURL];
avPlayerq.actionAtItemEnd = AVPlayerActionAtItemEndNone;
AVPlayerLayer *videoLayer = [AVPlayerLayer playerLayerWithPlayer:avPlayerq];
videoLayer.frame= self.view.bounds;
videoLayer.videoGravity=AVLayerVideoGravityResizeAspectFill;
[self.view.layer addSublayer:videoLayer];
[avPlayerq play];
Hope this may help you to sort out your issue.
The Problem:
During every playback, the audio is between 1-2 seconds behind the video.
The Setup:
The assets are loaded with AVURLAssets from a media stream.
To write the composition, I'm using AVMutableCompositions and AVMutableCompositionTracks with asymmetric timescales. The audio and video are both streamed to the device. The timescale for audio is 44100; the timescale for video is 600.
The playback is done with AVPlayer.
Attempted Solutions:
Using videoAssetTrack.timeRange for [composition insertTimeRange].
Using CMTimeRangeMake(kCMTimeZero, videoAssetTrack.duration);
Using CMTimeRangeMake(kCMTimeZero, videoAssetTrack.timeRange.duration);
The Code:
+(AVMutableComposition*)overlayAudio:(AVURLAsset*)audioAsset
withVideo:(AVURLAsset*)videoAsset
{
AVMutableComposition* mixComposition = [AVMutableComposition composition];
AVAssetTrack* audioTrack = [self getTrackFromAsset:audioAsset withMediaType:AVMediaTypeAudio];
AVAssetTrack* videoTrack = [self getTrackFromAsset:videoAsset withMediaType:AVMediaTypeVideo];
CMTime duration = videoTrack.timeRange.duration;
AVMutableCompositionTrack* audioComposition = [self composeTrack:audioTrack withComposition:mixComposition andDuration:duration andMedia:AVMediaTypeAudio];
AVMutableCompositionTrack* videoComposition = [self composeTrack:videoTrack withComposition:mixComposition andDuration:duration andMedia:AVMediaTypeVideo];
[self makeAssertionAgainstAudio:audioComposition andVideo:videoComposition];
return mixComposition;
}
+(AVAssetTrack*)getTrackFromAsset:(AVURLAsset*)asset withMediaType:(NSString*)mediaType
{
return [[asset tracksWithMediaType:mediaType] objectAtIndex:0];
}
+(AVAssetExportSession*)configureExportSessionWithAsset:(AVMutableComposition*)composition toUrl:(NSURL*)url
{
AVAssetExportSession* exportSession = [[AVAssetExportSession alloc] initWithAsset:composition presetName:AVAssetExportPresetHighestQuality];
exportSession.outputFileType = #"com.apple.quicktime-movie";
exportSession.outputURL = url;
exportSession.shouldOptimizeForNetworkUse = YES;
return exportSession;
}
-(IBAction)playVideo
{
[avPlayer pause];
avPlayerItem = [AVPlayerItem playerItemWithAsset:mixComposition];
avPlayer = [[AVPlayer alloc]initWithPlayerItem:avPlayerItem];
avPlayerLayer =[AVPlayerLayer playerLayerWithPlayer:avPlayer];
[avPlayerLayer setFrame:CGRectMake(0, 0, 305, 283)];
[avPlayerLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
[playerView.layer addSublayer:avPlayerLayer];
[avPlayer seekToTime:kCMTimeZero];
[avPlayer play];
}
Comments:
I don't understand much of the AVFoundation framework. It is entirely probable that I am simply misusing the snippets I have provided. (i.e. why "insertTimeRange" for composition?)
I can provide any other information needed for resolution - including debug asset track property values, network telemetry, streaming information, etc.
If it's consistent, it appears there is an enforced delay to sample the audio properly.
Apple's guides are usually easier to read than their accompanying books, however here is the specific note on delay.
https://developer.apple.com/library/ios/technotes/tn2258/_index.html
The programming guides will detail why/what.
So I am streaming a video file with audio using AVPlayer and have a UIWebView overlayed over the video that has controls for play/pause, seek, ect. I also have a slider for volume that I am trying to implement but so far I haven't had any luck. Here is my code the change the volume:
- (void)setPlayerVolume:(float)volume
{
NSArray *tracks = [self.player.currentItem.asset tracksWithMediaType:AVMediaTypeAudio];
NSMutableArray *audio = [NSMutableArray array];
for (AVAssetTrack *track in tracks) {
AVMutableAudioMixInputParameters *input = [AVMutableAudioMixInputParameters audioMixInputParameters];
[input setVolume:volume atTime:kCMTimeZero];
[input setTrackID:track.trackID];
[audio addObject:input];
}
AVMutableAudioMix *mix = [AVMutableAudioMix audioMix];
[mix setInputParameters:audio];
[self.player.currentItem setAudioMix:mix];
}
I have been reading up, and it seems like the only solution to use MPVolumeView. Are there any other solutions?
Thanks for any help, its greatly appreciated.
I wanted to change volume settings with a UISlider.
I used currentItem inside AVQueuePlayer.
ps0 is an AVQueuePlayer.
I have no error and same sound level when I use my UISlider:
- (IBAction)volumeSliderMoved:(UISlider *)sender
{
AVMutableAudioMixInputParameters *audioInputParams = [AVMutableAudioMixInputParameters audioMixInputParameters];
AVPlayerItem *av = [ps0 currentItem];
CMTime currentTime = [av currentTime];
float volume = [sender value];
[audioInputParams setVolume:volume atTime:currentTime];
AVMutableAudioMix *audioMix = [AVMutableAudioMix audioMix];
audioMix.inputParameters = [NSArray arrayWithObject:audioInputParams];
av.audioMix = audioMix;
[ps0 replaceCurrentItemWithPlayerItem: av];
}
EDITED :
I tried another solution from Apple to change volume settings.
As you can see in this solution, it create a new playerItem and a new player.
But my playerItem is a copy of the current one because I just want to change the sound (not the item). And it is automatically related to the old player.
When I try to use their solution. I have an error message saying:
An AVPlayerItem cannot be associated with more than one instance of AVPlayer
Any suggestion?
EDITED again
To change playback with AVQueuePlayer
I have an array with every mp3 name “textMissingTab”
I have an array with AVPlayerItem “soundItems”
Creation :
textMissingTab = [[NSArray alloc] initWithObjects:#"cat",#"mouse",#"dog",#"shark",#"dolphin", #"eagle", #"fish", #"wolf", #"rabbit", #"person", #"bird", nil];
for (NSString *text in textMissingTab)
{
NSURL *soundFileURL = [[NSURL alloc] initFileURLWithPath: [[NSBundle mainBundle] pathForResource:text ofType:#"mp3"]];
AVPlayerItem *item = [AVPlayerItem playerItemWithURL:soundFileURL];
[soundItems addObject:item];
}
Init :
NSURL *soundFileURL = [[NSURL alloc] initFileURLWithPath: [[NSBundle mainBundle] pathForResource:#"dog" ofType:#"mp3"]];
ps0 = [[AVQueuePlayer alloc] initWithURL:soundFileURL];
Change playItem : text is NSString
int index = [textMissingTab indexOfObject:text];
[ps0 setActionAtItemEnd:AVPlayerActionAtItemEndNone];
CMTime newTime = CMTimeMake(0, 1);
[ps0 seekToTime:newTime];
[ps0 setRate:1.0f];
[ps0 replaceCurrentItemWithPlayerItem:[soundItems objectAtIndex:(index)]];
[ps0 play];
I had several problems using AVQueuePlayer and changing playback parameters. If your goal is to use a slider for volume adjustment, I would replace the UISlider with a blank UIView in your storyboard and then instantiate an MPVolumeView within that view. This works reliably for me. Note that MPVolumeView does not show up on the simulator.
I think you are right tigloo. MPVolumeView is the best way to manage sound level.
It is explained in this tutorial :http://www.littlereddoor.co.uk/ios/controlling-system-output-volume-by-adding-an-mpvolumeview-object-to-an-ios-application/
"Everything works exactly as we would expect until the user hits the stumbling block that is created by the current ringer volume that is set on the device. The maximum value of the AVAudioPlayer property is 1.0, where 1.0 is equal to the current ringer volume setting of the device. Simply put, if the device ringer volume is set to 50% volume, then 100% of the AVAudioPlayer volume still only equates to the already set 50% ringer. The limitations of using this method speak for themselves."
I edited again my post to show how I manage some songs with AVQueuePlayer. This part of code is working.
AVAsset *asset;
NSArray *playerTracks;
NSMutableArray *playerParams;
AVMutableAudioMix *muteAudioMix;
for (int k=0; k<[[audio items] count]; k++)
{
//disable audio (this is the version when you have more than one video in the playlist: i write this version so it should be more useful)
asset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:[soundfile objectAtIndex:k+([soundfile count]-[[audio items] count])] ofType:#"mp3"]] options:nil];
playerTracks = [asset tracksWithMediaType:AVMediaTypeAudio];
playerParams = [NSMutableArray array];
for (AVAssetTrack *track in playerTracks) {
AVMutableAudioMixInputParameters *audioInputParams = [AVMutableAudioMixInputParameters audioMixInputParameters];
[audioInputParams setVolume:1.0 atTime:kCMTimeZero];
[audioInputParams setTrackID:[track trackID]];
[playerParams addObject:audioInputParams];
}
muteAudioMix = [AVMutableAudioMix audioMix];
[muteAudioMix setInputParameters:playerParams];
[[[audio items] objectAtIndex:k] setAudioMix:muteAudioMix];
}
I'm using AVPlayer for playing radio stream.
For initializing player i'm using next code:
self.asset = [AVAsset assetWithURL:self.url];
self.item = [AVPlayerItem playerItemWithAsset:self.asset];
self.player = [AVPlayer playerWithPlayerItem:self.item];
I've read this question Adjusting the volume of a playing AVPlayer
and i'm trying to set volume with slider value
- (void)setVolume:(float )volume
{
_volume = volume;
NSArray *audioTracks = self.asset.tracks;
NSMutableArray *allAudioParams = [NSMutableArray array];
for (AVAssetTrack *track in audioTracks) {
AVMutableAudioMixInputParameters *audioInputParams =
[AVMutableAudioMixInputParameters audioMixInputParameters];
[audioInputParams setVolume:volume atTime:kCMTimeZero];
[allAudioParams addObject:audioInputParams];
[audioInputParams setTrackID:[track trackID]];
}
AVMutableAudioMix *audioMix = [AVMutableAudioMix audioMix];
[audioMix setInputParameters:allAudioParams];
NSLog(#"%#", self.player.currentItem);
NSLog(#"%f", volume);
[self.player.currentItem setAudioMix:audioMix];
}
I'm also trying to set
[audioInputParams setVolume:volume atTime:self.player.currentTime];
but there are not any tracks in that array (self.asset.tracks),
and its have not any effect on volume. (also i can't get any metadata),
I can't use AVAudioPlayer for playing audio stream by url
An instance of the AVAudioPlayer class, called an audio player,
provides playback of audio data from a file or memory.
Apple recommends that you use this class for audio playback unless you
are playing audio captured from a network stream or require very low
I/O latency.
I'm thinking about using that code https://github.com/DigitalDJ/AudioStreamer/downloads
for playing radio stream, but i don't know how set volume with Audiotoolbox.
Please, help me! Thanks!
i have tried lots of solutions, but the best way to do that is to implement an instance ov MPVolumeVIew:
self.myViewVolume = [[MPVolumeView alloc] initWithFrame:CGRectMake(20, 330, 280, 50)];
[self.myViewVolume sizeToFit];
[self.view addSubview:self.myViewVolume];
You can add this to any UIView you want, just change the class to MPVolumeView
Do not forget to add MediaPlayer framework.
Here is what you have to do if you want to get metadata from your stream:
[playerItem addObserver:self forKeyPath:#"timedMetadata" options:NSKeyValueObservingOptionNew context:NULL];
With this you can simply add the information to any UILabel