我合并了Swift2.3中的两个音频文件。减少合并音频文件?
它工作正常。文件大小为7MB。所以我无法发送到服务器。
如何减少音频文件的大小?这样我就可以轻松发送到服务器。 我附上了下面的代码。这对试图合并的人很有用:
func mixAudio()
{
let currentTime = CFAbsoluteTimeGetCurrent()
let composition = AVMutableComposition()
let compositionAudioTrack = composition.addMutableTrackWithMediaType(AVMediaTypeAudio, preferredTrackID: kCMPersistentTrackID_Invalid)
compositionAudioTrack.preferredVolume = 0.8
let avAsset = AVURLAsset.init(URL: soundFileURL, options: nil)
print("\(avAsset)")
var tracks = avAsset.tracksWithMediaType(AVMediaTypeAudio)
let clipAudioTrack = tracks[0]
do {
try compositionAudioTrack.insertTimeRange(CMTimeRangeMake(kCMTimeZero, avAsset.duration), ofTrack: clipAudioTrack, atTime: kCMTimeZero)
}
catch _ {
}
let compositionAudioTrack1 = composition.addMutableTrackWithMediaType(AVMediaTypeAudio, preferredTrackID: kCMPersistentTrackID_Invalid)
compositionAudioTrack.preferredVolume = 0.8
let avAsset1 = AVURLAsset.init(URL: soundFileURL1)
print(avAsset1)
var tracks1 = avAsset1.tracksWithMediaType(AVMediaTypeAudio)
let clipAudioTrack1 = tracks1[0]
do {
try compositionAudioTrack1.insertTimeRange(CMTimeRangeMake(kCMTimeZero, avAsset1.duration), ofTrack: clipAudioTrack1, atTime: kCMTimeZero)
}
catch _ {
}
var paths = NSSearchPathForDirectoriesInDomains(.LibraryDirectory, .UserDomainMask, true)
let CachesDirectory = paths[0]
let strOutputFilePath = CachesDirectory.stringByAppendingString("/newone.mov")
print(" strOutputFilePath is \n \(strOutputFilePath)")
let requiredOutputPath = CachesDirectory.stringByAppendingString("/newone.m4a")
print(" requiredOutputPath is \n \(requiredOutputPath)")
let audioFileOutput = NSURL.fileURLWithPath(requiredOutputPath)
print(" OUtput path is \n \(audioFileOutput)")
do {
try NSFileManager.defaultManager().removeItemAtURL(audioFileOutput)
}
catch _ {
}
let exporter = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetAppleM4A)
exporter!.outputURL = audioFileOutput
exporter!.outputFileType = AVFileTypeAppleM4A
exporter!.exportAsynchronouslyWithCompletionHandler
{() -> Void in
print(" OUtput path is \n \(requiredOutputPath)")
print("export complete: \(CFAbsoluteTimeGetCurrent() - currentTime)")
do
{
print(audioFileOutput)
print(" OUtput path is \n \(requiredOutputPath)")
self.wasteplayer = try AVAudioPlayer(contentsOfURL: audioFileOutput)
self.wasteplayer.numberOfLoops = 0
self.wasteplayer.play()
}
}
catch _
{
}
}
编码为MP3或AAC合并后? – Moritz
Iam不编码任何东西..我只是合并两个音频文件(一个文件是背景歌曲()MP3和另一个是语音(M4A)我已经记录)。我附上上面的代码..我只是检查合并的文件在文件夹..大小应该是7MB.soi想要减小尺寸。 – HariKarthick
这就是为什么我建议你在合并后编码你的音频到MP3或AAC ** ... – Moritz