I am trying to play video in background everything works just fine and the video play and get pause normally in background.But the only problem is whenever I go back from the from my
videoviewcontroller(the view on which is played to menu), the video still remains in the background and you can see it as Musicplayer position. How can this be removed once I get out of videoviewcontroller
I have tried
NSError *error;
[[AVAudioSession sharedInstance] setActive:NO error:&error];
NSLog(#"ERROR: %#", error);
output
ERROR: (null)
this code removes the video from the background
[[AVAudioSession sharedInstance] setCategory:nil error:nil];
but if now if want to play the video again it will not play in background mode
From Apple's:AVAudioSession class documentation
It says
Deactivating your session will fail if any associated audio objects (such as queues, converters, players or recorders) are currently running.
So you need to stop any/all of this audio objects before calling the setActive:No
I had had similar issues while trying to perform this before stopping my audio queue.
In mi case I was using an external audio library (Dirac) and I just needed to call an AudioQueueStop method from this library before.
Related
In iOS, I'm trying to duck the Music app's music when playing some sound effects. In case you don't know, "ducking" simply means that the music volume gets a bit down before playing my sound, then the sound plays, and then the music volume gets back its initial volume.
For ducking, I'm setting AVAudioSession category to AVAudioSessionCategoryAmbient with option AVAudioSessionCategoryOptionDuckOthers, and then activating/deactivating the session (and playing the sound in-between, obviously). It works well, but the volume changes seem to be done in the same thread as the call, and the app hangs while the volume is being modified.
If you want to replicate the behavior, I think the fastest route is to start a new SpriteKit project, which will give you the sample, ship rotating project. Then put the following code in the touchesBegan:withEvent method:
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient withOptions: AVAudioSessionCategoryOptionDuckOthers error: nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];
[[AVAudioSession sharedInstance] setActive:NO error:nil];
Next run the app in an iOS device, put some music in the Music app and touch the screen to create ships and duck the music. You'll hear the ducking, but also see the ships freezing on the screen.
Is this normal? What would be the simplest way to avoid the app freezing while the ducking is made?
By the way, I'm using an iPhone 5S on iOS 8.1. Also, I'm using this in a Unity3D plugin. How can I duck the Music app from Unity itself?
You can try putting the AVAudioSession calls on a different thread. Then they won't be blocking the main (UI) thread. This is especially for setActive, which takes a noticeable amount of time to complete.
dispatch_queue_t myQueue = dispatch_queue_create("com.myname.myapp", nil);
dispatch_async(myQueue, ^{
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient withOptions: AVAudioSessionCategoryOptionDuckOthers error: nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];
});
This question also seems relevant: iOS AudioSessionSetActive() blocking main thread?
How to keep the video player silent after the video recorder has been initialized and the silent switched is turned on?
In the application I am working on I have a video player (will call it player) and a video recorder (will call it recorder). If the phone is in silent mode (the switch on the side of the device is turned on to disable the sound) the player is kept silent when entering the application which is an expected and desired result. But after the recorder has begun running the session this behavior is lost and the video will play out loud although the silent mode is enabled.
I know specifically where this happens is when startRunning is called on an AVCaptureSession.
I also know the reason is somewhere in [AVAudioSession sharedInstance] category or mode property which seem to be changed right after the session begins running.
So what I do at the moment is call
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategorySoloAmbient error:&error];
[[AVAudioSession sharedInstance] setMode:AVAudioSessionModeDefault error:&error];
after the recording is completed to reset the session. The issue is this works in most but not all cases, sometimes reports error, sometimes works with a delay, sometimes doesn't work at all.
The possible solutions I am looking for are (any would do):
Somehow prevent the recorder to enable sound playing
Have a clear way of resetting the category and mode after the recording has completed (no errors or misbehaving)
Have a clean solution to find the state of the silence button (seems the old functions are deprecated and I found nothing but hacks)
Any other ideas welcome
An important information is that I have both the player and a recorder initialized all the time for a quick usage. Also I can control the player to be mute.
What I use for player:
AVFoundation
AVPlayer
AVPlayerLayer
The source is an AVAsset representing a remote URL
The implementation is pretty standard.
What I use for the recorder:
AVFoundation
AVCaptureDeviceInput
AVCaptureMovieFileOutput
AVCaptureVideoPreviewLayer
Again all pretty standard.
Hope this question doesn't get down voted - I haven't seen anything in the documentation.
I want to play music from the ipod library while the app is in the back ground.
I am creating the music player using the default mechanism.
-(void)viewWillAppear:(BOOL)animated
{
MPMusicPlayerController *myPlayer =
[MPMusicPlayerController applicationMusicPlayer];
// assign a playback queue containing all media items on the device
[myPlayer setQueueWithQuery: [MPMediaQuery songsQuery]];
// start playing from the beginning of the queue
[myPlayer play];
}
As soon as the app enters the background the music stops playing. I would like it to continue playing though.
I do not want to use the iPodMusicPlayer option
How can I do this?
You should set background audio mode in the project settings (Project settings > Capabilities > Background modes > Audio and AirPlay) like it's shown on the screenshot below:
Also you should set Audio Session Category in the appDelegate (in the didFinishLaunching method). Example is shown below:
NSError *setCategoryErr = nil;
NSError *activationErr = nil;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error:&setCategoryErr];
[[AVAudioSession sharedInstance] setActive:YES error:&activationErr];
I have same issue. I searched even after added flag in plist. It will not work because :
The applicationMusicPlayer does not support background music. Use
MPMusicPlayerController's systemMusicPlayer instead. It shares the
state with the built-in System player and music will continue to play
when your app enters the background.
Other Solution is :
You can use AVAudioPlayer to play either streamed or local(bundle) audio. It even allows you to play multiple audio file at the same time having an AVAudioPlayer instance for each.
Note : iPodMusicPlayer is deprecated. so Instead of this use systemMusicPlayer.
I've searched around for this but haven't found anything helpful thus far. In my app, any music that is already playing on the device is faded out to be replaced by my game's music.
I know from experience that this can be really annoying and can even be a reason to not play the game at all. How can I avoid this? More specifically, I would like the game's music and sound effects to be played if there is no music already being played by the user - otherwise the game music should be muted and the user's music should continue to play.
If at all relevant, I am using AVAudioPlayer to play my sounds - background music and sound effects.
I pulled this from my git history:
{ // Set audio category to ambient - allows music to coexist with the application
NSError *error;
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory: AVAudioSessionCategoryAmbient error: &error];
if (error) {
NSLog(#"setCategory failed %#",error);
}
}
Hope it helps.
I implement MPMoviePlayerViewController to play video and I enable airPlay and works great but the problem is when the screen on the ipad locks. My question is how can make sure the MPMoviePlayerViewController still in airPlay even when the screen locks. Any of you knows how can I make this work?
Where as Apple thinks that When user can't see the video what is the benefit to runs consistently? So there is no need to play Video when you can't see it. Apple pauses it when app goes to background or screen locks. If you still want to play it you can add notification to start and stop when you go to background and come to foreground.
Hope this helps.
In your Info.plist file, add the key "Required background modes" with the value "App plays audio or streams audio/video using AirPlay".
Also, when you receive the notification MPMoviePlayerIsAirPlayVideoActiveDidChangeNotification, add these lines:
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];
And add this line to your dealloc method:
[[AVAudioSession sharedInstance] setActive:NO error:nil];