APP CRASH ERROR LIKE "format.sampleRate"

[akashrtridhya]

Hello sir,

I am getting below error while recording audio in foreground

Error:
required condition is false: [AVAudioIONodeImpl.mm:1064:SetOutputFormat: (format.sampleRate == hwFormat.sampleRate)]

Xcode :11.4.1
Language swift 4.2
MacOS: Catalina version 10.15.5
Iphone : 8plus
iphone Os: 13.3.1

Below is my code:

File name: RecorderViewContrlloer

let settings = [AVFormatIDKey: kAudioFormatLinearPCM, AVLinearPCMBitDepthKey: 16, AVLinearPCMIsFloatKey: true, AVSampleRateKey: Float(16000.0), AVNumberOfChannelsKey: 1] as [String : Any]

    self.recordingTs = NSDate().timeIntervalSince1970
    self.silenceTs = 0
    do {
        let session = AVAudioSession.sharedInstance()
        try session.setCategory(.playAndRecord, mode: .default)
        try session.setActive(true)
    } catch let error as NSError {
        print(error.localizedDescription)
        return
    }
    let inputNode = self.audioEngine.inputNode
    guard let format = self.format() else {
        return
    }

// let format = inputNode.inputFormat(forBus: 0)

    inputNode.installTap(onBus: 0, bufferSize: 512, format: format) { (buffer, time) in
        
        let level: Float = -50
        let length: UInt32 = 1024
        buffer.frameLength = length
        let channels = UnsafeBufferPointer(start: buffer.floatChannelData, count: Int(buffer.format.channelCount))
        var value: Float = 0
        vDSP_meamgv(channels[0], 1, &value, vDSP_Length(length))
        var average: Float = ((value == 0) ? -100 : 20.0 * log10f(value))
        if average > 0 {
            average = 0
        } else if average < -100 {
            average = -100
        }
        let silent = average < level
        print(self.audioEngine.manualRenderingSampleTime)
        let ts = NSDate().timeIntervalSince1970
        self.totLTs = ts
        if ts - self.renderTs > 0.1 {
            let floats = UnsafeBufferPointer(start: channels[0], count: Int(buffer.frameLength))
            let frame = floats.map({ (f) -> Int in
                return Int(f * Float(Int16.max))
            })
            DispatchQueue.main.async
                {
                    self.renderTs = ts
                    let len = self.audioView.waveforms.count
                    for i in 0 ..< len {
                        let idx = ((frame.count - 1) * i) / len
                        let f: Float = sqrt(1.5 * abs(Float(frame[idx])) / Float(Int16.max))
                        self.audioView.waveforms[i] = min(49, Int(f * 50))
                    }
                    self.audioView.active = !silent
                    self.audioView.setNeedsDisplay()
            }
        }
        
        let write = true
        if write {
            if self.audioFile == nil {
                self.audioFile = self.createAudioRecordFile()
            }
            if let f = self.audioFile {
                do {
                    try f.write(from: buffer)
                } catch let error as NSError {
                    print(error.localizedDescription)
                }
            }
        }
    }
    do {
        recorder = try AVAudioRecorder(url: self.fileUrl(), settings: settings)
        recorder?.delegate = self
        recorder?.isMeteringEnabled = true
        recorder?.prepareToRecord()
        self.audioEngine.prepare()
        try self.audioEngine.start()
    } catch let error as NSError {
        print(error.localizedDescription)
        return
    }
    self.updateUI(.recording)
}

Above is my code of recording. Application is crash on inputNode.installTap(onBus: 0, bufferSize: 512, format: format) { (buffer, time) in

And give error like above mention

We have to deploy the application so please suggest and guide us for this issue

Look forward to hearing from you soon..
Regards
Akash

[akashrtridhya]

Please update