我有 4 个 AKPlayer
节点,每个节点都连接到一些效果器,最后将它们混合在一起。
我想离线呈现 iOS > 9.0 的输出,但我不知道如何做。
编辑:我已经为 iOS >11 实现了渲染并将其分离 虽然 iOS>11 renderToFile 似乎做得不错,但对于 iOS <11,渲染文件有一些滞后并在几秒钟内向前跳转,导致最终无声。
这是我的渲染函数:
do{
if #available(iOS 11, *) {
let outputFile = try AKAudioFile(forWriting: url, settings: [:])
_ = AudioKit.engine.isRunning
try AudioKit.renderToFile(outputFile, duration: karaPlayer.duration, prerender: {
self.seekTo(time: 0)
})
}else {
let offlineNode = AKOfflineRenderNode(self.mixer)
AudioKit.output = offlineNode
offlineNode.internalRenderEnabled = false
try AudioKit.start()
self.seekTo(time: 0)
try offlineNode.renderToURL(url, duration: self.karaPlayer.duration)
self.karaPlayer.stop()
self.voicePlayer.stop()
offlineNode.internalRenderEnabled = true
}
} catch {
print(error)
print("Couldn't render output file")
}
混音器的输入是 2 个从“.caf”文件读取的 AKPlayer 节点。
最佳答案
如果你想使用 iOS11+,你可以使用 AudioKit 的渲染文件:
/// Render output to an AVAudioFile for a duration.
/// - Parameters
/// - audioFile: An file initialized for writing
/// - seconds: Duration to render
/// - prerender: A closure called before rendering starts, use this to start players, set initial parameters, etc...
///
@available(iOS 11.0, macOS 10.13, tvOS 11.0, *)
public func renderToFile(_ audioFile: AVAudioFile, seconds: Double, prerender: (() -> Void)? = nil) throws {
如果您需要支持 iOS9+,请使用 AKOfflineRenderNode 的 render to URL 函数:
@available(iOS,过时:11) @available(tvOS,过时:11) @available(macOS,过时:10.13) 开放类 AKOfflineRenderNode:AKNode、AKComponent、AKInput {
public typealias AKAudioUnitType = AKOfflineRenderAudioUnit
public static let ComponentDescription = AudioComponentDescription(effect: "mnrn")
private var internalAU: AKAudioUnitType?
open var internalRenderEnabled: Bool {
get { return internalAU!.internalRenderEnabled }
set { internalAU!.internalRenderEnabled = newValue }
}
open func renderToURL(_ url: URL, seconds: Double, settings: [String: Any]? = nil) throws {
return try internalAU!.render(toFile: url, seconds: seconds, settings: settings)
}
关于ios - 使用适用于 iOS < 11 的 AudioKit 进行离线音频渲染,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50238045/