因此,经过大量搜索,我能够找到允许在播放背景音频的同时录制视频的代码块。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。由于某些原因,当相机加载背景音频时,音量会降低。当我使用instagram录制视频时,音频不会降低,并且仍然记录,有什么方法可以更改我的当前代码块,以在使用视频重新编码时不降低音量?
我阅读了文档,显然.duckOthers选项应该是减小音量的唯一选项。但是这个也做]
好,所以我进一步研究了一些文档后就找到了答案。
下面发布了更新的代码。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")
}
}
上面的代码对我不起作用,直到我删除了.allowBluetooth并仅保留.allowBluetoothA2DP,否则,蓝牙质量确实令人讨厌[]
谢谢!