Using AVFoundation to play audio asset results in error

Question

Created Jun ’20

Replies 6

Boosts 1

Views 3.9k

Participants 7

Hi, I've been trying to play an audio asset (.m4a) using an AVAudioPlayer, but results in what I believe is an internal error.

I've been using the following code to load and play the asset. Please note that the code was run using an iPad Pro 11-inch simulator with iPadOS 14 in Xcode 12 beta.

Code Block Swiftguard let audioData = NSDataAsset(name: "Example")?.data else {
    fatalError("Asset not found")
}
do {
    let audioPlayer = try AVAudioPlayer(data: audioData, fileTypeHint: "m4a")
    audioPlayer.play()
} catch {
    fatalError(error.localizedDescription)
}

The catch block is not reached, but the audio does not play and the console logs the following:

Code Block Text2020-06-26 14:48:25.784066-0500 Name[45441:2235216]  HALB_IOBufferManager_Client::GetIOBuffer: the stream index is out of range
2020-06-26 14:48:25.784551-0500 Name[45441:2235216]  HALB_IOBufferManager_Client::GetIOBuffer: the stream index is out of range
2020-06-26 14:48:25.796707-0500 Name[45441:2235216] [aqme] 255: AQDefaultDevice (1): output stream 0: null buffer
2020-06-26 14:48:25.797137-0500 Name[45441:2235216] [aqme] 1778: EXCEPTION thrown (-50): error != 0

Can you please let me know if there's something wrong with the way I'm loading/playing the asset or if this looks like an internal bug in the betas?

Answered by Media Engineer in 616548022

Thank you bringing this to our attention. This is a known issue in the simulator and we are actively working to resolve it ASAP.

Note that this issue is limited to the Simulator

Boost

Answer 1

rubendelapena OP

Jun ’20

I've performed the following test successfully in Xcode 11.5 with an iOS 13 simulator.

Code Block Swiftclass ViewController: UIViewController {
    var audioPlayer: AVAudioPlayer!
    override func viewDidLoad() {
        super.viewDidLoad()
        guard let audioData = NSDataAsset(name: "Example")?.data else {
            fatalError("Asset not found")
        }
        do {
            self.audioPlayer = try AVAudioPlayer(data: audioData, fileTypeHint: "m4a")
            self.audioPlayer.play()
        } catch {
            fatalError(error.localizedDescription)
        }
    }
}

Sadly this same example does not work in iOS 14. I've filed a radar (FB7800041) about this.

0

Answer 2

Media Engineer OP

Apple

Jun ’20

Accepted Answer

Thank you bringing this to our attention. This is a known issue in the simulator and we are actively working to resolve it ASAP.

Note that this issue is limited to the Simulator

7

Answer 3

KrtNthnyLn OP

Jun ’20

Me too

0

Answer 4

wired14 OP

Aug ’20

It runs fine for me in Xcode 12 beta 3, but crashes in Xcode 11.6.

0

Answer 5

pupasani OP

Apr ’21

I don't know why the above is marked as a solution. Just because the media team is aware of it doesn't mean the problem is solved. This issue still exists 9 months later!

1

Answer 6

forresthopkins_faithlife OP

May ’21

I'm currently having this problem in iOS simulators < 14 when using Big Sur. The behavior is also described in the reddit thread with ID jff05e.

1