我在下面创建了合并方法(加入、联合,我不确定哪个词是正确的,我想从 2 个或更多个中制作 1 个音频,而不是一个接一个地播放,而是一次播放每个) .作为输入,我有多个 .wav 格式的音频文件,我想输出 1 个 .wav 格式。
func merge(audioUrls: [NSURL], resultName : String = "result") {
let resultNameWithExtension = resultName + ".wav"
//Create AVMutableComposition Object.This object will hold our multiple AVMutableCompositionTrack.
let composition = AVMutableComposition()
//create new file to receive data
//let documentDirectoryURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first!
let outputFilePath = NSTemporaryDirectory().stringByAppendingPathComponent(resultNameWithExtension)
let fileDestinationUrl = NSURL(fileURLWithPath: outputFilePath)
print(fileDestinationUrl)
StorageManager.sharedInstance.deleteFileAtPath(NSTemporaryDirectory().stringByAppendingPathComponent(resultNameWithExtension))
var avAssets: [AVURLAsset] = []
var assetTracks: [AVAssetTrack] = []
var timeRanges: [CMTimeRange] = []
for audioUrl in audioUrls {
let compositionAudioTrack:AVMutableCompositionTrack = composition.addMutableTrackWithMediaType(AVMediaTypeAudio, preferredTrackID:kCMPersistentTrackID_Invalid)
let avAsset = AVURLAsset(URL: audioUrl, options: nil)
avAssets.append(avAsset)
let assetTrack = avAsset.tracksWithMediaType(AVMediaTypeAudio)[0]
assetTracks.append(assetTrack)
let duration = assetTrack.timeRange.duration
let timeRange = CMTimeRangeMake(kCMTimeZero, duration)
timeRanges.append(timeRange)
do {
try compositionAudioTrack.insertTimeRange(timeRange, ofTrack: assetTrack, atTime: kCMTimeZero)
} catch let error as NSError {
print("compositionAudioTrack insert error: \(error)")
}
}
let assetExport = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetPassthrough)!
assetExport.outputFileType = AVFileTypeWAVE
assetExport.outputURL = fileDestinationUrl
assetExport.exportAsynchronouslyWithCompletionHandler({
self.delegate?.assetExportSessionDidFinishExport(assetExport, outputFilePath: outputFilePath)
})
}
我的问题是它不起作用,我不知道为什么。我得到的错误:
Error Domain=AVFoundationErrorDomain Code=-11838 "Operation Stopped" UserInfo={NSLocalizedDescription=Operation Stopped, NSLocalizedFailureReason=The operation is not supported for this media.})
当我将预设和输出类型更改为 .m4a 时,它可以正常工作,但我需要 .wav。当我有相同格式的输入时,它应该与 .wav 一起工作,对吧?感谢您的帮助
最佳答案
如果你想将一个音频文件混合或重叠到另一个音频文件,那么你应该编写这段代码,但你只能生成 .m4a 文件而不是 .wav 文件。我使用 .mp3 文件作为输入文件。
在 swift3 中:
例如:
func playmerge(audio1: NSURL, audio2: NSURL)
{
let composition = AVMutableComposition()
let compositionAudioTrack1:AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaTypeAudio, preferredTrackID: CMPersistentTrackID())
let compositionAudioTrack2:AVMutableCompositionTrack = composition.addMutableTrack(withMediaType: AVMediaTypeAudio, preferredTrackID: CMPersistentTrackID())
let documentDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! as NSURL
self.fileDestinationUrl = documentDirectoryURL.appendingPathComponent("resultmerge.m4a")! as URL
let filemanager = FileManager.default
if (!filemanager.fileExists(atPath: self.fileDestinationUrl.path))
{
do
{
try filemanager.removeItem(at: self.fileDestinationUrl)
}
catch let error as NSError
{
NSLog("Error: \(error)")
}
if (theError == nil)
{
print("The music files has been Removed.")
}
else
{
print("Error")
}
}
else
{
do
{
try filemanager.removeItem(at: self.fileDestinationUrl)
}
catch let error as NSError
{
NSLog("Error: \(error)")
}
if (theError == nil)
{
print("The music files has been Removed.")
}
else
{
print("Error")
}
}
let url1 = audio1
let url2 = audio2
let avAsset1 = AVURLAsset(url: url1 as URL, options: nil)
let avAsset2 = AVURLAsset(url: url2 as URL, options: nil)
var tracks1 = avAsset1.tracks(withMediaType: AVMediaTypeAudio)
var tracks2 = avAsset2.tracks(withMediaType: AVMediaTypeAudio)
let assetTrack1:AVAssetTrack = tracks1[0]
let assetTrack2:AVAssetTrack = tracks2[0]
let duration1: CMTime = assetTrack1.timeRange.duration
let duration2: CMTime = assetTrack2.timeRange.duration
let timeRange1 = CMTimeRangeMake(kCMTimeZero, duration1)
let timeRange2 = CMTimeRangeMake(kCMTimeZero, duration2)
do
{
try compositionAudioTrack1.insertTimeRange(timeRange1, of: assetTrack1, at: kCMTimeZero)
try compositionAudioTrack2.insertTimeRange(timeRange2, of: assetTrack2, at: kCMTimeZero)
}
catch
{
print(error)
}
let assetExport = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetAppleM4A)
assetExport?.outputFileType = AVFileTypeAppleM4A
assetExport?.outputURL = fileDestinationUrl
assetExport?.exportAsynchronously(completionHandler:
{
switch assetExport!.status
{
case AVAssetExportSessionStatus.failed:
print("failed \(assetExport?.error)")
case AVAssetExportSessionStatus.cancelled:
print("cancelled \(assetExport?.error)")
case AVAssetExportSessionStatus.unknown:
print("unknown\(assetExport?.error)")
case AVAssetExportSessionStatus.waiting:
print("waiting\(assetExport?.error)")
case AVAssetExportSessionStatus.exporting:
print("exporting\(assetExport?.error)")
default:
print("complete")
}
do
{
self.player = try AVAudioPlayer(contentsOf: self.fileDestinationUrl)
self.player?.numberOfLoops = 0
self.player?.prepareToPlay()
self.player?.volume = 1.0
self.player?.play()
self.player?.delegate=self
}
catch let error as NSError
{
print(error)
}
})
}
关于iOS 将 2 个或更多音频文件合并(混合)为 wav 格式,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37680414/