需要關於AVAssetExportSession的幫助

Question

 NSArray *pres = [AVAssetExportSession exportPresetsCompatibleWithAsset:asset]; 
     if([pres containsObject:AVAssetExportPreset640x480]) { 
      AVAssetExportSession *session = [[AVAssetExportSession alloc]initWithAsset:asset presetName:AVAssetExportPreset640x480]; 
      FileManagerUtilities *fUtil = [[FileManagerUtilities alloc]init]; 
      session.outputURL = [NSURL fileURLWithPath:[fUtil searchPathDirectory:NSDocumentDirectory byAppendingDirectoryPath:nil andFileName:@"tempVideo.mov"]]; 
      session.outputFileType = AVFileTypeQuickTimeMovie; 
      session.fileLengthLimit = 10.0; 
      [session exportAsynchronouslyWithCompletionHandler:^{ 

       switch ([session status]) { 
        case AVAssetExportSessionStatusFailed: 
         NSLog(@"Export failed: %@", [[session error] localizedDescription]); 
         break; 
        case AVAssetExportSessionStatusCancelled: 
         NSLog(@"Export canceled"); 
         break; 
        default: 
         break; 
       } 
      }]; 
     } 

我想將session.fileLengthLimit設置爲10mb，但不知道我在做什麼錯誤。無法將大小限制爲10mb，請將fileLengthLimit設置爲10mb。

Answer 1

的fileLenghtLimit應以字節爲單位，即：

session.fileLengthLimit = 10*1024*1024;