How to convert AVAsset to NSData or save it to file manager

问题

I am trying to do that using AVAsset to record Audio file and then after first i store it on NSFileManager and after that by convert it to nsdata i Call API to store it.

I am successful to Create AVAsset recording file and play it using third party Class that is SCPlayer.

Now problem is that i don't know how to Use AVAsset file for save it in file manager and then after call API to sent it by converting it to NSData.

Is any way to convert AVAsset to NSData???

Please Help...

回答1:

You can do the following:

1. Use AVAssetExportSession to export your AVAsset object to a file path URL.

2. Convert it to NSData using its dataWithContentsOfURL method.

   
   NSURL *fileURL = nil;
   __block NSData *assetData = nil;
   
   // asset is you AVAsset object
   AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetHighestQuality];
   
   exportSession.outputURL = fileURL;
   // e.g .mov type 
   exportSession.outputFileType = AVFileTypeQuickTimeMovie; 
   
   [exportSession exportAsynchronouslyWithCompletionHandler:^{
       assetData = [NSData dataWithContentsOfURL:fileURL];
       NSLog(@"AVAsset saved to NSData.");
   }];
   

3. Don't forget to clean up the output file after doing whatever you need to do with it ;)

回答2:

Swift 3

let manager = PHImageManager.default()    
manager.requestAVAsset(forVideo: asset, options: nil, resultHandler: { (avasset, audio, info) in
                if let avassetURL = avasset as? AVURLAsset {
                    guard let video = try? Data(contentsOf: avassetURL.url) else {
                        return
                    }
                    videoData = video
                }
            })

回答3:

You could have a look at AVAssetExportSession

AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetHighestQuality];
exporter.outputURL = exportUrl;

[exporter exportAsynchronouslyWithCompletionHandler:^{
    // here your file will be saved into file system at specified exportUrl
}];

来源：https://stackoverflow.com/questions/28237412/how-to-convert-avasset-to-nsdata-or-save-it-to-file-manager