我有一个成功记录并将文件上传到我的PHP服务器的应用程序，遗憾的是该文件无法播放。我收到了指导，我需要使用AVAssetExportSession将文件转换为mp4以使其正常工作，但我无法正确地将其合并到我的代码中。我收到了错误
错误域= AVFoundationErrorDomain代码= -11823“无法保存” UserInfo = {NSLocalizedRecoverySuggestion =再次尝试保存。， NSLocalizedDescription =无法保存，NSUnderlyingError = 0x1d465ea50 {错误域= NSOSStatusErrorDomain代码= -12101“（null）”}}
这是我的代码：
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
print("Got a video")
if let pickedVideo:URL = (info[UIImagePickerControllerMediaURL] as? URL) {
// Save video to the main photo album
let selectorToCall = #selector(CameraVideoViewController.videoWasSavedSuccessfully(_:didFinishSavingWithError:context:))
UISaveVideoAtPathToSavedPhotosAlbum(pickedVideo.relativePath, self, selectorToCall, nil)
imageSelected = true
uuid = UUID().uuidString
if imageSelected == true {
saveFileName = "video-\(uuid).mp4"
}
// Save the video to the app directory so we can play it later
let videoData = try? Data(contentsOf: pickedVideo)
let paths = NSSearchPathForDirectoriesInDomains(
FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentsDirectory: URL = URL(fileURLWithPath: paths[0])
let dataPath = documentsDirectory.appendingPathComponent(saveFileName)
try! videoData?.write(to: dataPath, options: [])
print("Saved to " + dataPath.absoluteString)
imagePicker.dismiss(animated: true, completion: {
// Anything you want to happen when the user saves an video
self.encodeVideo(dataPath: dataPath)
self.uploadVideo(videoData!)
})
} }
// custom body of HTTP request to upload image file
func createBodyWithParams(_ parameters: [String: String]?, filePathKey: String?, videoData: Data, boundary: String) -> Data {
let body = NSMutableData();
if parameters != nil {
for (key, value) in parameters! {
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendString("\(value)\r\n")
}
}
// if file is not selected, it will not upload a file to server, because we did not declare a name file
var filename = ""
if imageSelected == true {
filename = "video-\(uuid).mp4"
}
let mimetype = "video/mp4"
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
body.appendString("Content-Type: \(mimetype)\r\n\r\n")
body.append(videoData)
body.appendString("\r\n")
body.appendString("--\(boundary)--\r\n")
return body as Data
}
//文件转换
func encodeVideo(dataPath: URL){
let avAsset = AVURLAsset(url: dataPath)
let startDate = Date()
let exportSession = AVAssetExportSession(asset: avAsset, presetName: AVAssetExportPresetPassthrough)
let docDir = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let myDocPath = NSURL(fileURLWithPath: docDir).appendingPathComponent("temp.mp4")?.absoluteString
let docDir2 = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] as NSURL
let filePath = docDir2.appendingPathComponent("rendered-Video.mp4")
//uploadVideo(filePath)
//deleteFile(filePath!)
if FileManager.default.fileExists(atPath: myDocPath!){
do{
try FileManager.default.removeItem(atPath: myDocPath!)
}catch let error{
print(error)
}
}
//self.uploadVideo((myDocPath as AnyObject) as! URL)
exportSession?.outputURL = filePath
exportSession?.outputFileType = AVFileType.mp4
exportSession?.shouldOptimizeForNetworkUse = true
let start = CMTimeMakeWithSeconds(0.0, 0)
let range = CMTimeRange(start: start, duration: avAsset.duration)
exportSession?.timeRange = range
exportSession!.exportAsynchronously{() -> Void in
switch exportSession!.status{
case .failed:
print("\(exportSession!.error!)")
case .cancelled:
print("Export cancelled")
case .completed:
let endDate = Date()
let time = endDate.timeIntervalSince(startDate)
print(time)
print("Successful")
print(exportSession?.outputURL ?? "")
default:
break
}
}
}
//文件上传
func uploadVideo(_ videoData: Data) {
func createBodyWithParams(_ parameters: [String: String]?, filePathKey: String?, videoData: Data, boundary: String) -> Data {
let body = NSMutableData();
if parameters != nil {
for (key, value) in parameters! {
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendString("\(value)\r\n")
}
}
var filename = ""
if imageSelected == true {
filename = "video-\(uuid).mp4"
}
let mimetype = "video/mp4"
body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
body.appendString(String(describing: "Content-Type: \(mimetype)\r\n\r\n".data(using: String.Encoding.utf8)))
body.append(videoData)
body.append(String(format: "\r\n").data(using: String.Encoding.utf8)!)
body.append("--\(boundary)--\r\n".data(using: String.Encoding.utf8)!)
return body as Data
}
let id = user!["id"] as! String
uuid = UUID().uuidString
let url = URL(string: "http://www.foo.com/videoposts.php")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
let param = [
"id" : id,
"uuid" : uuid
]
// body
let boundary = "Boundary-\(UUID().uuidString)"
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
// if picture is selected, compress it by half
let imageData = Data()
// ... body
request.httpBody = createBodyWithParams(param, filePathKey: "file", videoData: imageData, boundary: boundary)
// launch session
URLSession.shared.dataTask(with: request) { data, response, error in
// get main queu to communicate back to user
DispatchQueue.main.async(execute: {
if error == nil {
do {
// json containes $returnArray from php
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
// declare new var to store json inf
guard let parseJSON = json else {
print("Error while parsing")
return
}
// get message from $returnArray["message"]
let message = parseJSON["message"]
// if there is some message - post is made
if message != nil {
// reset UI
self.postBtn.alpha = 0.4
self.imageSelected = false
// switch to another scene
self.tabBarController?.selectedIndex = 4
}
} catch {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = "\(error)"
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
} else {
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = error!.localizedDescription
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
})
}.resume()
}
答案 0 :(得分：0)
尝试检查要保存到的目录中是否已经存在某些文件。您可以添加以下代码。
do { // delete old video
try FileManager.default.removeItem(at: savePathUrl)
} catch { print(error.localizedDescription) }