my problem is that I am using AVAudioPlayer to playback sound.
Everything fine till this point!
If I add a UIImagePickerController with sourceType UIImagePickerControllerSourceTypeCamera,
my volume rockers wont show up anymore.
Any idea?
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i made a djplayer for myself. everything works fine but the output-quality is very bad, if the rate of the avaudioplayer is not exactly 1.0 .
i already tried to change the sampleRate of my AVAudioSession. still the same.
the app is a skscene and i use the update method to set the avplayerrate on every frame, which i get from my jogwheel/turntable and/or from a fader.
this method works fine for me with the avaudioplayer except the quality.
so i tried to write the code for an avplayer, which gives me the quality i ned for this project but now when i touch the turntable or fader and change the rate, the sound completely disappears until the avplayer has processed the new rate.
can someone help me please?
Okay guys i have a problem. I'm stream MPMoviePlayerController and i want it to play audio in background and i've somewhat achieved this.
This is what i do in my -didFinishLaunchingWithOptions:
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
[audioSession setActive:YES error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
Now whenever the application calls -applicationWillResignActive:
i do a post notification to continue the playback. And this works but it's an ugly fix. As there is a second delay between the sound stopping and the notification being called. So the playback stops for a second and then continues again by calling the notification which just says [viewPlayer play];
And many other have achieved smooth background playback. Like spotify or other apps whenever you enter background mode there is no sound lag/clipping in sound. This is really annoying to listen to whenever i press the home button or lock the phone.
Yes i did set the background mode for playback.
I have also tried -applicationDidEnterBackground: but this notification is even slower. It comes after -applicationWillResignActive:
I have no idea how to fix this, and or how others achieved it. I have looked through almost all other similar questions. None have my problem.
Thanks in advance.
I've recently used a framework to stream YouTube video inline in a UIView. This framework has a category on MPMoviePlayerController which works pretty well. You notice a change in the music when going to background but it is still acceptable.
The category can be found here:
MPMoviePlayerController+BackgroundPlayback.h
MPMoviePlayerController+BackgroundPlayback.m
hello I am trying to make an app, with a "switch" where it can set that AvAudioPlayer object will play or not audiofile in backgorund.
Does exist a way to change this mode, in oder to choose as option to play an audiofile with AvAudioplayer in background?
I mean Pragrammatically and then during RUNTIME.
Thanks so much for you help
( and clear explanation )
I am playing some short sounds on my iPad like so: Play a short sound in iOS
I am using a caf file which I can successfully play from the Finder. Now I went through quite a bit of a hassle trying to achieve the playback of the sound and I am curious what might be the problems which I don't seem to understand:
Option 1: When I create the SystemSoundID and then play it right away I don't hear anything on the device and the simulator.
Option 2: When I create an instance variable for the SystemSoundID and initialize it in viewDidLoad I manage to play sound but only on the iPad, not the Simulator.
Option 3: Instead of using SystemSoundID I can also use AVAudioPlayer to playback a .wav file which then works on both the iPad and the Simulator but here I need to create the AVAudioPlayer in viewDidLoad otherwise I won't get any sound if I do everything in one go.
The best option currently seems to be Option 3 because it works on both the Simulator and the iPad, but because I need to pre-initialize the Player I would need an AVAudioPlayer instance for every different sound that I want to play, which does not seem to be very memory-wise...
Is there something that I am missing and is it possible to play sounds on both platforms using the AudioToolbox framework (Option 1 & Option 2)
I wrote a library to simplify all this. It wraps AVAudioPlayer, and works fine on both the device and simulator.
https://github.com/nicklockwood/SoundManager
The code is fairly straightforward, although I do some semi-clever stuff to initialise the audio player. If you don't want to use the library you can just copy the code.
A word of warning though - the simulator throws some odd exceptions internally whenever you use AVAudioPlayer. They don't affect the app at all, but if you have enabled break-on-exceptions in Xcode then the app will drop into the debugger a few times during startup and you'll have to manually resume, which may freak you out if you're not expecting it.
I am trying to put together a simple app to play a pre-roll video followed by some content video.
Currently, I'm trying to use the AVQueuePlayer class to get this done. Unfortunately, it seems to want to play the videos properly in sequence.
For example, the pre-roll plays by itself for a few seconds, then (prior to the pre-roll being complete) it starts to try and play the content video. For a few seconds, the player seems to be at war with itself and switches back and forth between the two videos (neither playing very well at all). Finally, when the pre-roll is finished, the content video then plays the rest of the way normally.
I've looked through the documentation for the AVQueuePlayer and I don't see anything obvious that I'm missing.
My code is pretty basic:
AVPlayerItem *preRollItem = [AVPlayerItem playerItemWithURL: preRollUrl];
AVPlayerItem *contentItem = [AVPlayerItem playerItemWithURL: contentUrl];
self.player = [AVQueuePlayer queuePlayerWithItems:[NSArray arrayWithObjects:preRollItem, contentItem, nil]];
[self.player play];
What is the trick to getting the videos to play in sequence.
Make sure you are actually testing on the device. From my experience the iOS5 simulator has big problems with AVQueuePlayer and does bizarre things.
I found the iOS4.3 simulator is doing a much better job when it comes to testing AVFoundation.