如何转换AVAssetExportSession的响应

Question

我正在使用AVAssetExportSession进行音频记录和断言，这里是我的代码，以将AVAssert转换为AVAssertExportSession。

AVAssetExportSession *exportSession = [AVAssetExportSession exportSessionWithAsset:self.asset presetName:AVAssetExportPresetAppleM4A];
exportSession.outputURL = [NSURL URLWithString:dataPath];
exportSession.outputFileType = AVFileTypeAppleM4A;
exportSession.shouldOptimizeForNetworkUse = YES;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
    NSLog(@".... Audio... %@",exportSession);
}];

它给了我这样的输出

<AVAssetExportSession: 0x177f4b30, asset = <AVURLAsset: 0x18981f60, URL = file:///private/var/mobile/Containers/Data/Application/8BB39AD5-EEFB-4AF1-A913-B26C5C072E61/tmp/1422861622SCVideo.0.m4a>, presetName = AVAssetExportPresetAppleM4A, outputFileType = com.apple.m4a-audio

这里我只想要NSString的网址。

帮我个忙

Answer 1

导出会话完成后，您可以得到所需的内容。因为它是一个异步操作。

[exportSession exportAsynchronouslyWithCompletionHandler:^{
        if (exportSession.status == AVAssetExportSessionStatusFailed) {
            NSLog(@"failed");
        } else if(exportSession.status == AVAssetExportSessionStatusCompleted){
            NSLog(@"completed!");
            // here you can get the output url.
        }
    }];