I've got an iPhone app with a short intro video. If a user launches the app while their iPod is playing music, the music will stop while the video plays (whether or not the video has sound), and the audio stays permanently stopped after video playback.
Apple seems to indicate that you can solve this with AudioSession tricks:
https://web.archive.org/web/20100819124854/http://developer.apple.com:80/iPhone/library/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/WorkingWithOpenALiPodMusicandMovies/WorkingWithOpenALiPodMusicandMovies.html
But their suggestions here just don't seem to work; it seems like MPMoviePlayerController overrides the audio session configuration for its own purposes. Ideally I'd mix the movie audio over the iPod audio or maybe use ducking, but even restarting the music might be a passable fix.
I've found a great solution for that. In the .h file, you must create a BOOL called "wasPlaying". Before playing your video, you ask the iPod if it was playing.
if ([[MPMusicPlayerController iPodMusicPlayer] playbackState] == MPMusicPlaybackStatePlaying)
{
NSLog(#"Music was playing, lets put YES to the bool");
wasPlaying = YES;
}
Then, after you tell the movie player to play, you call the following:
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(finishedPlaying) name:MPMoviePlayerPlaybackDidFinishNotification object: moviePlayer];
And after that, in the method finishedPlaying:
if (wasPlaying ==YES)
{
NSLog(#"Music was playing, lets play music again");
[[MPMusicPlayerController iPodMusicPlayer] play];
}
For me it worked fine!
I think you can do this by initializing the audio session similar to this:
NSError *audioSessionError = nil;
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryAmbient
error:&audioSessionError] == YES)
Then when you want to use the audio session you can set the iPod audio to duck the video track:
AudioSessionInitialize (NULL, NULL, NULL, NULL);
OSStatus propertySetError = 0;
UInt32 allowMixing = true;
propertySetError |= AudioSessionSetProperty(kAudioSessionProperty_OtherMixableAudioShouldDuck, sizeof(allowMixing), &allowMixing);
AudioSessionSetActive(YES);
You can only have a single music-providing app at any time and multiple sources of (brief) sounds. If a background app is playing music, your app can overlay brief sounds. If you want to play music, the background app has to be stopped.
So I don't think that what you're trying to achieve is possible using MPMoviePlayerController (or any of the high-level audio frameworks). You might be able to overlay an audio track of a movie, if it's sufficiently short but MPMoviePlayerController is probably not good for this.
Related
Is there any way I can access music playing in the native iOS music app? For example on button press in my app it pauses the built in Music app. I've tried MPMusicPlayerController but that doesn't seem to be what I want; or I'm not using it correctly.
This is what I've tried.
if ([musicPlayer playbackState] == MPMusicPlaybackStatePlaying) {
[musicPlayer pause];
} else {
[musicPlayer play];
}
Depends on how you instantiate your music player. To get access to the system global payer you should use:
MPMusicPlayerController *musicPlayer = [MPMusicPlayerController iPodMusicPlayer];
Be aware that if you're using applicationMusicPlayer it will only work for your application and pausing music will not affect the music playing in your Music.app.
See the MPMusicPlayerController documentation overview section for a more extensive description of the two.
When I launch my iPhone game as soon as a sound plays the background music or podcast that is playing stops. I noticed other games allow background audio to continue to play.
How is this possible? Do I need to override a method in my App Delegate?
Place this line in your application:didFinishLaunchingWithOptions: method of your AppDelegate or in general before using the audio player.
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil];
According to the documentation, the AVAudioSessionCategoryAmbient category is
for an app in which sound playback is nonprimary—that is, your app can be used successfully with the sound turned off.
This category is also appropriate for “play along” style apps, such as a virtual piano that a user plays over iPod audio. When you use this category, audio from other apps mixes with your audio. Your audio is silenced by screen locking and by the Silent switch (called the Ring/Silent switch on iPhone).
If you want also to ensure that no error occurred you have to check the return value
NSError *error;
BOOL success = [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:&error];
if (!success) {
//Handle error
NSLog(#"%#", [error localizedDescription]);
} else {
// Yay! It worked!
}
As a final remark, don't forget to link the AVFoundation framework to your project and import it.
#import <AVFoundation/AVFoundation.h>
My app plays video file without sound. And it interrupts any playing music in backgroud (iPod app for example). How do not interrupt audio session of other apps if it's possible.
My video file is without sound. To play video i use MPMoviePlayerController.
EDIT: Here is my video player code:
_player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:path]];
[self installMovieNotificationObservers:nil];
[_player setShouldAutoplay:YES];
[_player setUseApplicationAudioSession:NO];
[_player.view setFrame:self.navController.view.frame];
[_player setMovieSourceType:MPMovieSourceTypeFile];
[_player setRepeatMode:MPMovieRepeatModeNone];
[_player setFullscreen:YES animated:YES];
[_player setControlStyle:MPMovieControlStyleNone];
[_navController.view addSubview:_player.view];
[_player play];
Directly from Apple's docs:
http://developer.apple.com/library/ios/documentation/mediaplayer/reference/MPMoviePlayerController_Class/Reference/Reference.html#//apple_ref/occ/instp/MPMoviePlayerController/useApplicationAudioSession
useApplicationAudioSession
A Boolean value that indicates whether the
movie player should use the app’s audio session.
#property (nonatomic) BOOL useApplicationAudioSession Discussion The
default value of this property is YES. Setting this property to NO
causes the movie player to use a system-supplied audio session with a
nonmixable playback category.
Important In iOS 3.1 and earlier, a movie player always uses a
system-supplied audio session. To obtain that same behavior in iOS 3.2
and newer, you must set this property’s value to NO. When this
property is YES, the movie player shares the app’s audio session. This
give you control over how the movie player content interacts with your
audio and with audio from other apps, such as the iPod. For important
guidance on using this feature, see “Working with Movies and iPod
Music” in Audio Session Programming Guide.
Changing the value of this property does not affect the currently
playing movie. For the new setting to take effect, you must stop
playback and then start it again.
Availability Available in iOS 3.2 and later. Declared In
MPMoviePlayerController.h
Swift 5 answer
do {
if #available(iOS 10.0, *) {
try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, mode: AVAudioSession.Mode.default, options: .mixWithOthers)
} else {
try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, options: .mixWithOthers)
}
try AVAudioSession.sharedInstance().setActive(true)
} catch {
print(error)
}
i'm developing an app which requires to play a video from an URL using MPMoviePlayerController while acquiring audio samples using AudioQueue from the microphone to further analyze them.
The problem is that I cannot record when the video starts playing (and also when it finishes). Simply the audio sampling stops. Instead, if I disable the video play, audio recording goes well.
I've tried setting up an AudioSession with property kAudioSessionProperty_OverrideCategoryMixWithOthers but with no success (it returns error). Moreover I think that it's useless setting a property in AudioSession when using AudioQueue. Even setting useApplicationAudioSession = NO for MPMoviePlayerController does not give any help.
Hereby the core code where the player is created:
audioManager = [[AudioController alloc] init];
//setting AudioQueue: audio buffer, sample rate, format ID (PCM), bits per channel
audioManager.delegate = self;
[audioManager startAudioRecording]; //starts recording with AudioQueue
self.playerVC = [[[MPMoviePlayerController alloc] init] autorelease];
layerVC.view.frame = self.viewPlayer.bounds;
[self.viewPlayer addSubview:playerVC.view];
playerVC.useApplicationAudioSession = YES; //if NO nothing changes
[playerVC setContentURL:[NSURL URLWithString:#"http://www......."]];
[playerVC prepareToPlay];
[playerVC play];
You're on the right way.
First, set the kAudioSessionProperty_OverrideCategoryMixWithOther to true. This will allow your app's sound mixes with sounds from another apps.
UInt32 allowMixing = true;
AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(allowMixing), &allowMixing);
After that, you will need to set MPMoviePlayerController to not use your app's AudioSession:
[yourMPMoviePlayerControllerInstance setUseApplicationAudioSession:NO];
I have a problem with MPMoviePlayerController, i.e. I am playing the live stream url in (m3u8 format) MPMoviePlayer like below:
player = [[MPMoviePlayerController alloc] initWithContentURL:audioUrl];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(loadStateDidChange:)
name:MPMoviePlayerLoadStateDidChangeNotification
object:player];
if ([player respondsToSelector:#selector(loadState)])
{
// Set movie player layout
[player setMovieSourceType:MPMovieSourceTypeStreaming];
[player setControlStyle:MPMovieControlModeVolumeOnly];
[player setFullscreen:YES];
[player prepareToPlay];
[player play];
}
}
It is working in both simulators & iPad device with ios 5 version, but it is not giving the audio in any iPhone device i have.
Please help me out...
Thanks, in advance.
mr simham ... check this below url it help for us becoZ
Call stream-url within mobile safari. If that has the same results, then your code is correct and the stream is not. It would be an incorrectly encoded audio stream then.
it depends on bandwidth also below ref url regards to bandwidth check it once.... u r ref Stream URL prepare,according to BandWith
REFERENCE URL:
http://wfmu.org/ssaudionet.shtml
APPLE
You are assigning a deprecated MPMovieControlMode (MPMovieControlModeVolumeOnly) towards the controlStyle property which is expecting a MPMovieControlStyle.
Additionally, your code is missing the part that assigns the MPMoviePlayerController.view towards any superview and also its sizing is missing.
Last but I guess most importantly for you, I am guessing that the iPhone you are trying it with has set the volume all the way down to silence. Or, maybe the audio-routing is not set towards speaker-output. For the latter, make sure you are not setting up the audio session incorrectly anywhere else in your App. When in doubt, try fiddling with the useApplicationAudioSession property. Try setting it towards NO and see if that changes your results.
If all above fails, then one additional check would be to call the stream-url within mobile safari. If that has the same results, then your code is correct and the stream is not. It would be an incorrectly encoded audio stream then.
Check if your iPhone is on loudspeaker mode or not -
if not than set it using this-
UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride);
Check if the iPhone is in silent mode. To play audio even in silent mode, add the following code in AppDelegate's application:didFinishLaunchingWithOptions:
NSError *setCategoryErr = nil;
NSError *activationErr = nil;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error:&setCategoryErr];
[[AVAudioSession sharedInstance] setActive:YES error:&activationErr];