I'm developing a teaching app playing video animations with no sound.
I would like to prevent the movie player from stopping other audio sessions (such as the iPod) when the video is launched.
Is there any way to indicate the iOS the video has no audio or play in mute mode?
Thanks in advance for your help!
You can always detect if the music is playing and and resume it right way after the movie started playing.
Detecting player state
[MPMusicPlayerController iPodMusicPlayer] playbackState]
Resume
[[MPMusicPlayerController iPodMusicPlayer] play];
I think maybe something like this
UInt32 allowMixing = YES;
AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(allowMixing), &allowMixing);
AudioSessionSetActive(YES);
should do the the trick.
Keep in mind, you'll need to add the AudioToolbox library to your application, and add:
#import <AudioToolbox/AudioToolbox.h>
to your classes imports in order to use the above code.
It should allow your app's sounds to mix with the other app's sounds in the background. In this case, since your app is silent, it will just allow background sounds to keep playing.
Hope it helps!
Related
Is there a music player that has playback controls built in (like MPMoviePlayer) but for audio?
Why don't you go with MPMoviePlayerController, for the audio files also? There you can play with the controls, view, frame etc.
It should be relatively simple to implement custom controls for AVAudioPlayer located in the AVFoundation framework. It has pre-made methods for play, pause, and stop, and audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag to handle playlists. You should give it a look.
Apple provide a example 'avTouch' that can be use as reference
according to the documentation the correct way to allow sounds to be played even if the ringer switch is set to off is like so:
UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);
I then throughout the app play short wav files that play perfectly using
AudioServicesPlaySystemSound(sysSound)
....until the ringer is switched off and then.....silence?
No matter what I do I cannot get the sound to play if the ringer is off?
Any one ..... please?
Did you try using AudioSessionSetActive(YES); at the end?
AudioServicesPlaySystemSound never plays while the ringer is switched off in my experience. If you play sounds using AVAudioPlayer instead, you should get the behavior you are looking for:
let player: AVAudioPlayer = try AVAudioPlayer(contentsOf: url)
player.delegate = self
player.play()
You will also need to activate the audio session before playing if you have not already. And set an audio session category that supports sounds while silenced like you already did. Consider stopping the audio session when no audio is playing to conserve battery life.
A notable difference between AudioServices and AVAudioPlayer is that if the ringer is silenced, AudioServices playback will return almost immediately while AVAudioPlayer will take the full length of the sound before completing. As far as I know, the only way to detect and respond to the user's ringer setting is to use AudioServices instead of AVAudioPlayer. If you just want to play while silenced though this should not be relevant.
Whenever I start an AVCaptureSession running with the microphone as an input it cancels whatever background music is currently running (iPod music for instance). If I comment out the line adding the audio input, the background audio continues.
Does anyone know of a way to record video clips with the microphone while continuing to allow background audio to play? I've looked around a lot, and can't seem to find any references to this behavior.
Thanks for any help!
Try setting kAudioSessionProperty_OverrideCategoryMixWithOthers as seen in https://stackoverflow.com/a/7426406/16572
Is the background music a looping track? -- if so you could make it a system sound and tell it to re-play when it finishes playing. The reason being you can only have tracks up to 30 seconds as a system sound.
Don't know if it helps -- but thats one approach :)
Cheers,
Michael
I had the same problem and used this in my app and it worked:
UInt32 audioRouteOverride = kAudioSessionCategory_AmbientSound;
AudioSessionSetProperty (kAudioSessionProperty_AudioCategory,sizeof (audioRouteOverride),&audioRouteOverride);
I was able to record video and audio and at the same time play a sound out of the speakers.
HI all
i am playing a video(.mp4 format) without sound (i mean it doesn't have sound it is a mute video ) and in the background i am playing an audio file (.mp3 format) when i play my code through simulator it works fine as i want like when i tap on the video it is just mute but behind i am playing the audio so for user it seems that video has this sound but when i installed my code in device and play video than it doesn't work like so it play video but without sound than how can i play an audio and a video together in the above format ?
actually we are not just playing a single video or audio file it just comes from an array by choosing randomly and same for the audio file so we cann't do this i think so any other idea for it ??
Should we use another format for audio aur video for doing this thing ??
thanks for the help
Balraj verma
The problem is that the default Audio Session does not allow audio mixing.
In the Reference Library (Working with Movie Players) they say you should use a mixable category configuration for your audio session, for example the Ambient category. In the Application Delegate:
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *setCategoryError = nil;
[audioSession setCategory:AVAudioSessionCategoryAmbient error: &setCategoryError];
Apple's documentation states that some audio formats are not suited to be played back simultaneously because of hardware restrictions. See Playing Multiple Sounds Simultaneously for more details.
A solution for you would be to use PCM encoded audio which should allow simultaneous playback.
I would like to add that I managed to play two mp3 audio files at the same time on 3G and 3GS iPhones. Which shouldn't be possible according to documentation but worked for me.
You can rather use the an instance of AvAudioPlayer in a new thread. Use the following link to see how does this work
http://www.mobileorchard.com/easy-audio-playback-with-avaudioplayer/
create an instance of MPMoviePlayer to start playback of videos.
Hope this will work.
You should combine the audio and video using some video editing software like iMovie or Windows Movie Maker. Using the software to "composite" audio and video together is not a good idea and adds additional overhead, synchronization issues, etc.
As far as I know, you can't play AVAudioPlayer and MPMoviePlayer at the same time.
I noticed that some apps programmatically mute itunes (if its running) at launching. How is this achieved? I have a game with background music and would like to either stop itunes or get at least a message that itunes is playing so that I can stop the game's background music.
thx,
marc.
You don't need to. With Audio Session you can decide how the audio should behave.
From the Audio Session Programming Guide:
With the audio session interface, you
specify aspects of your application’s
audio behavior and configure it to
live harmoniously within the iPhone
audio environment. You start by asking
yourself questions such as these:
Do you want your audio to be silenced by the Ring/Silent switch?
The answer is probably “yes” if audio
is not essential to using your
application successfully. (Users will
appreciate being able to run your game
in a meeting with no one the wiser.)
Do you want iPod audio to continue playing when your audio
starts? This could be appropriate for
a virtual piano, letting users play
along to songs in their libraries.
You’d want iPod audio to stop,
however, for a streaming radio
application.
You probably want this:
UInt32 sessionCategory = kAudioSessionCategory_SoloAmbientSound;
AudioSessionSetProperty (
kAudioSessionProperty_AudioCategory,
sizeof (sessionCategory),
&sessionCategory
);
For more behaviour types, check the Audio Session Categories, or read the entire Audio Session Programming Guide.
I had the opposite problem. My app plays a short video with no sound after launch. This caused the iTunes music playing in the background to mute.
In order to keep the music playing, I add this in the applicationDidFinishLaunching:
NSError* error;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryAmbient error: &error];
if (error) NSLog(#"Unable to configure Audio");