I have an app that uses AVAudioPlayer to play sound effects, music, etc. It works fine for just about every user (100,000+ users), but I've had several reports of sound not playing at all even though sound effects are working on other apps on the same device. The bug has gone away for some users after an app restart/device reboot, but for others it continues to persist. AVSpeechSynthesizer isn't working for these users either.
I haven't been able to reproduce the bug to see if the AVAudioPlayer is throwing an error, so I'm not sure if it is - but I don't see why it would be working fine for 99.9% of users and not this tiny subset.
Has anyone else run into something like this?
Here's the code I'm using to set up the player:
[[AVAudioSession sharedInstance] setCategory:#"AVAudioSessionCategoryAmbient" error:nil];
NSString *file = [filename stringByDeletingPathExtension];
NSString *extension = [filename pathExtension];
NSURL *soundFileURL = [[NSBundle mainBundle] URLForResource:file withExtension:extension];
self.soundPlayer1 = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFileURL error:&error];
[self.soundPlayer1 prepareToPlay];
Related
The app must to play a sound when it is in background. In the capabilities background fetch and audio & airplay are checked.
The method called for play the sound is that
-(void)playSound
{
NSString* str = [[NSBundle mainBundle] pathForResource:#"alarm4" ofType:#"wav"];
NSURL* url = [NSURL fileURLWithPath:str];
NSError* erreur;
self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&erreur];
if(!erreur)
{
[self.audioPlayer setVolume:1];
[self.audioPlayer setNumberOfLoops:-1];
[self.audioPlayer prepareToPlay];
[self.audioPlayer play];
}
else
NSLog(#"erreur de chargemnt %#", [erreur localizedDescription]);
}
Can you give me some advice, please?
My advice is: Don't even dream of such a thing. In general, you can't do it.
You can continue playing a sound as you go into the background, but you cannot spontaneously produce a sound out of the blue in an already backgrounded app. It would be terrible if this could happen, because the user would not know where the sound is coming from, the sound could mess up the user's music listening experience, etc.
You should ask yourself why you think you need to do such a thing in the first place. You probably don't need to.
(Some Apple apps can do it. For example, the Clock app produces a repeating alarm sound out of the blue, in the background. But you, as you have probably noticed by now, are not Apple.)
I am using an AVAudioPlayer to play audio in my app, and it worked for a while. Suddenly, it just stopped working and I cannot figure out why. I created the AVAudioPlayer at the class level in the .h file. This is the code I use to init the player
-(void)initAudio
{
NSURL *song = [[NSBundle mainBundle] URLForResource:#"Prelude" withExtension:#"m4a"];
NSError *error = nil;
_audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:song error:&error];
[_audioPlayer prepareToPlay];
}
I call this method in the initWithSize function. error is nil, and I have verified that the player object contains the actual audio file. The audio file plays back fine in my OS environment and I have tried adding it to the build phase compile sources just to be safe, even though beforehand it worked fine without it explicitly there. When I trigger the play event, it will play the first snippet of the audio and then nothing. I log the current time of the player and it is 0. Everything else about the app is continuing on and functions without issue. I do not interfere with the avaudioplayer object in any way except to play/pause/preparetoplay.
I am completely stumped as it worked fine and then suddenly no longer works. I have tried to clean the project, I have even dumped the derivedData.
Any ideas?
I think your player has an error when you try to play the song.
You need to check the error first.
In my opinion, it seems like OSStatus error -43.
When you update an app, file path can be changed.
For example,
old path : /var/mobile/Applications/F28E0C2C-4AE2-4C9D-906F-414AE1669D90/Documents/AAA.mp3
new path: var/mobile/Applications/6086783B-A410-42C3-9BAE-7BA755D0E528/Documents/AAA.mp3
Try this code instead:
NSError *error;
NSURL *song = [[NSBundle mainBundle] URLForResource:#"Prelude" withExtension:#"m4a"];
_audioPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:song error:&error];
if(error){
NSLog(#"[error localizedDescription] %#", [error localizedDescription]);
NSString *fileName = [[song absoluteString] lastPathComponent]; //this code is just example. get your fileName like "AAA.m4a"
NSString *docDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filePath = [NSString stringWithFormat:#"%#/%#", docDirPath , fileName];
_audioPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL URLWithString:filePath] error:&error];
}
_audioPlayer.delegate = self;
[_audioPlayer prepareToPlay];
[_audioPlayer play];
}
I hope this will help you.
Cheers
I have the following code that used to work to play a sound in my project however after iv done some playing around over the past few weeks on other aspects of the project it dose not seem to play.
The audio file is in the main directory and works in preview.
Any ideas?
//playsound
AVAudioPlayer *showsound;
NSString *audiopath = [[NSBundle mainBundle] pathForResource:#"mouse1" ofType:#"wav"];
NSURL *audiourl = [NSURL fileURLWithPath:audiopath];
showsound = [[AVAudioPlayer alloc]initWithContentsOfURL:audiourl error:Nil];
[showsound play];
It's because after the line showsound play your method comes to an end and showsound (your AVAudioPlayer) is released. Hence there is nothing to do any playing any more. Solution: retain it! (For example, set an instance variable to hold on to it.)
I’ve read many articles/posts on this topic, but I’m still unable to play a sound while the screen is locked.
In viewDidLoad, I initialize the audio session and set the audio property to kAudioSessionCategory_MediaPlayback:
AudioSessionInitialize(NULL, NULL, interruptionListenerCallback, self);
UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);
AudioSessionSetActive(true);
I then initialize my AVAudioPlayer variable (audioPlayer):
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource: #"click" ofType: #"wav"];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: fileURL error: &error];
[fileURL release];
I added “App plays audio” to a “Required background modes” section of my info.plist.
I added AVAudioPlayerDelegate and AVAudioSessionDelegate to my view controller’s *.h file (although I don’t know if that was necessary).
I play the (very short) sound periodically (~1x per second):
[audioPlayer play]
The sound plays fine when the screen is unlocked, but stops playing when I lock it. When I then unlock the screen, the (queued) sounds are played.
Ideas? Thanks!
Thanks holex:
I got "App plays audio" from http://mobile.tutsplus.com/tutorials/iphone/ios-sdk_background-audio/.
If you add a row with UIBackgroundModes to the plist, it's automatically populated and includes this and six other background modes. If you Google "App plays audio" and UIBackgroundModes you'll see plenty of hits.
[I would have replied via a Comment rather than an Answer, but alas, I don't have the reputation.]
It seems the problem is that I'm starting to play the sound after the screen has been locked. That's mostly answered in How to play sounds in locked mode on iPhone.
I am trying to play a sound on button click using the AVFoundation framework. Previously, i used audio toolbox however when i use the audioplayer nothing comes out. What is weird is that when i test it on my phone and i press the button, the volume controls aren't the normal ringer volume controls. This suggests that it should be playing but i can't hear anything, on my phone or the simulator. I have used different files, created new project changed the code, nothing has helped.
Here's the code in .h:
#interface MainViewController : UIViewController <AVAudioPlayerDelegate>
- (IBAction)test;
Here's the code in .m:
- (IBAction)test {
NSString *path = [[NSBundle mainBundle] pathForResource:#"sound" ofType:#"mp3"];
AVAudioPlayer* theAudio = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
theAudio.delegate = self;
[theAudio play];
}
can you do this before you play the sound i think you might have the wrong category:
AudioSessionInitialize (NULL,NULL,NULL,NULL);
UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty (kAudioSessionProperty_AudioCategory,sizeof (sessionCategory),&sessionCategory);
AudioSessionSetActive(true);