The application I'm currently working on plays background sound by using AVFoundation and effect sounds using the Finch engine. Problem is when I try to record video with sound (i.e. add a audio input to the session) by using AVFoundation lower level classes all sounds suddenly stop. Also, on iOS 5, if I try to record a second video I get an error. If the video is recorded without audio everything is fine. Any ideas what the cause might be
Your audio session is being interrupted by the AVFoundation daemon. You need to set a non-exclusive audio session category to stop this happening.
See the Audio Session Cookbook section of the Audio Session Programming Guide.
Related
I am building a iOS app with Ionic and Capacitor. I use AVFoundation inside a Capacitor plugin which provides a public method to play an audio file accessible at a remote URL. The basics work, the audio file is successfully played. Now I want to correctly handle interruptions and background audio. By background audio I mean start playing an audio file while the app is in the background and not continue playing it in the background when it was started in foreground before. To summarize, the app should behave the following way:
If another app (e.g. Spotify) is playing audio and my app wants to play audio, the other app should be interrupted and my app's audio should start playing without mixing.
If my app's audio is finished playing, the other app's audio should resume.
My app must be able to start playing audio without mixing when it is in the background.
I want to show a play/pause button and the audio title on the lockscreen and in the notification center.
I added the background mode audio capability. I use AVPlayer, AVAudioSession, MPNowPlayingInfoCenter and MPRemoteCommandCenter, followed best practices, especially regarding activation and deactivation of an audio session and interruption handling. I followed this question and this question. I tried several solutions, but never managed to achieve all of the above goals. What I found out so far is the following:
Goal 1. above is easy to achieve. Simply activate an audio session without mixing and start playing the audio.
After the audio of my app is finished, I deactivate the audio session. Unfortunately, I can only achieve goal 2. above if I don't use remote commands nor notification info. This means, my app then has no audio control UI on the lockscreen nor in the notification center. Somehow the configurations of MPNowPlayingInfoCenter and MPRemoteCommandCenter seem to affect the interruption behavior. As far as I could see, Apple documentation doesn't say anything about this.
I only manage to start playing audio in the background when setting the option .mixWithOthers. Apple documentation doesn't say anything about this, either.
Any help would be greatly appreciated.
Rony
I have an app that is used in the gym. The user may want to watch a video demonstrating an exercise without stopping the music they are playing through Spotify or some other app.
I used to do with with a UIWebView, and mix the audio in AVAudioSession, but I can't do this with WKWebView. WKWebView takes over the audio session and stops whatever else is playing, then it doesn't restart the audio it stopped.
My question is, what other ways can I play the Youtube video in my app without stopping the background music? or if it must stop, at least be able to restart the background music.
Music stopping at the gym and being forced to go out of the app to restart it is terrible user experience.
Also, please note that going back to UIWebView is not an option, as Apple is deprecating this class.
I am writing an app that plays an audio track for the user to listen to whilst recording from the camera and microphone (using headphones).
The audio track is played using AVAudioPlayer.
The camera/microphone is recorded using AVCaptureSession.
The output uses AVCaptureMovieFileOutput.
It all works perfectly on an iPhone 5 but my iPad 4 experiences an odd side effect. When playing back the recording from the iPad you can hear the audio track as if it has also been recorded. This is all done whilst using headphones and the audio is too quiet to be picked up by the microphone.
When testing on the iPhone only the audio from the mic is recorded, as expected. Both use the same code. Any ideas would be appreciated!!
In case anyone else is having the same problem. I couldn't solve it. Instead I used the setPreferredDataSource:error: method in AVAudioSession to use the device microphone instead of the one on the headset.
I am creating a radio streaming app with play, pause and volume slider.
I have implemented volume slider using MPVolumeView but unfortunately it is not working.
Can any one please let me know the correct code so that the volume slider will work in my app. I have used MPMoviePlayerController, AVPlayer, AVAudioPlayer.
Sounds as if you missed an important part of Apple's documentation;
Working with Movies and iPod Music
I am suspecting that you are using both, AVAudioPlayer and MPMoviePlayerController together and that you have setup some audio session attributes to get that working properly. Now when doing so, you may want to tell MPMoviePlayerController to use that session / or not.
Using the Media Player Framework Exclusively
If your application is using a movie player only, or a music player
only—and you are not playing your own sounds—then you should not
configure an audio session.
If you are using a movie player exclusively, you must tell it to use
its own audio session, as follows:
myMoviePlayer.useApplicationAudioSession = NO
If you are using a movie
player and a music player, then you probably want to configure how the
two interact; for this, you must configure an audio session, even
though you are not playing application audio per se. Use the guidance
in Table 6-1.
In my application I have made [audioSession setCategory:AVAudioSessionCategoryPlayback] to play audio in back ground and also to mute other audio play backs while playing song in my application. I am playing the audio using AVPlayer and also I have UIWebView for playing video in same Application. The issue arises when I play both video in web view and audio using AVPlayer. The music mixes in this case. Prior to iOS 6 when I rech same situation one audio pauses automatically and the mixing up does not occur. So kindly suggest some solutions.
Try to set
Required background modes -> App plays audio
in Info.plist.