首页 > 解决方案 > 录制视频时的音频音量

问题描述

因此,经过大量搜索后,我找到了允许在录制视频的同时播放背景音频的代码块。我在下面粘贴了上述代码块。

fileprivate func setBackgroundAudioPreference() {
    guard allowBackgroundAudio == true else {
        return
    }

    guard audioEnabled == true else {
        return
    }

    do{
        if #available(iOS 10.0, *) {
            try AVAudioSession.sharedInstance().setCategory(.playAndRecord, mode: .default, options: [.mixWithOthers, .allowBluetooth, .allowAirPlay, .allowBluetoothA2DP])
        } else {
            let options: [AVAudioSession.CategoryOptions] = [.mixWithOthers, .allowBluetooth]
            let category = AVAudioSession.Category.playAndRecord
            let selector = NSSelectorFromString("setCategory:withOptions:error:")
            AVAudioSession.sharedInstance().perform(selector, with: category, with: options)
        }
        try AVAudioSession.sharedInstance().setActive(true)
        session.automaticallyConfiguresApplicationAudioSession = false
    }
    catch {
        print("[SwiftyCam]: Failed to set background audio preference")

    }
}

但是,我有一个小问题。由于某种原因,当相机加载背景时,音频音量会降低。当我用 instagram 录制视频时,音频不会减少,它仍然会录制有没有什么办法可以改变我当前的代码块,在用视频重新编码时不降低音量?

我阅读了文档,显然 .duckOthers 选项应该是减少音量的唯一选项。但是这个也一样

标签: iosswiftavaudiosession

解决方案


好的,在深入研究一些文档后,我找到了答案。

更新了下面发布的代码。您所要做的就是设置 .defaultToSpeaker 选项

fileprivate func setBackgroundAudioPreference() {
    guard allowBackgroundAudio == true else {
        return
    }

    guard audioEnabled == true else {
        return
    }

    do{
        if #available(iOS 10.0, *) {
            try AVAudioSession.sharedInstance().setCategory(.playAndRecord, mode: .default, options: [.mixWithOthers, .allowBluetooth, .allowAirPlay, .allowBluetoothA2DP,.defaultToSpeaker])
        } else {
            let options: [AVAudioSession.CategoryOptions] = [.mixWithOthers, .allowBluetooth]
            let category = AVAudioSession.Category.playAndRecord
            let selector = NSSelectorFromString("setCategory:withOptions:error:")
            AVAudioSession.sharedInstance().perform(selector, with: category, with: options)
        }
        try AVAudioSession.sharedInstance().setActive(true)
        session.automaticallyConfiguresApplicationAudioSession = false
    }
    catch {
        print("[SwiftyCam]: Failed to set background audio preference")

    }
}

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