獲得AVFoundationErrorDomain代碼= -11829「試圖generateCGImagesAsynchronouslyForTimes

Question

我正在開發一個應用程序無法打開在錄製的視頻上傳到YouTube，但我需要表現出對用戶的拇指圖像，並有一個微調功能也上傳動作之前。

對於一些記錄文件，同時使用generateCGImagesAsynchronouslyForTimes

-(void)generateThumbnailsForAsset:(AVAsset *)asset thumbnailCount:(int)thumbnailCount andCompletionHandler:(void (^)(NSArray* thumbnailsArray))completionHandler 
{ 
NSMutableArray *imagesArray = [[NSMutableArray alloc] init]; 
_imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset]; 

KMSDebugLog(@"generateThumbnailsForAsset"); 
if (thumbnailCount == 1) 
{ 
    _imageGenerator.maximumSize = PREVIEW_IMAGE_SIZE; 
} 
else 
{ 
    _imageGenerator.maximumSize = THUMBNAIL_SIZE; 
} 

CMTime duration = asset.duration; 
AVAssetTrack *videoAssetTrack= [[asset tracksWithMediaType:AVMediaTypeVideo] lastObject]; 
CGAffineTransform videoTransform = videoAssetTrack.preferredTransform; 

UIImageOrientation videoOrientation= UIImageOrientationUp; 
if(videoTransform.a == -1.0 && videoTransform.b == 0 && videoTransform.c == 0 && videoTransform.d == -1.0) 
{ 
    videoOrientation= UIImageOrientationDown; 
} 
CMTimeValue intervalSeconds = duration.value/thumbnailCount; 
KMSDebugLog(@"duration.value :%lld duration.timescale:%d",duration.value,duration.timescale); 
CMTime time = kCMTimeZero; 
NSMutableArray *times = [NSMutableArray array]; 
for (NSUInteger i = 0; i < thumbnailCount; i++) { 
    [times addObject:[NSValue valueWithCMTime:time]]; 
    time = CMTimeAdd(time, CMTimeMake(intervalSeconds, duration.timescale)); 
} 


/*[self.imageGenerator generateCGImagesAsynchronouslyForTimes:times completionHandler:^(CMTime requestedTime, 
                         CGImageRef cgImage, 
                         CMTime actualTime, 
                         AVAssetImageGeneratorResult result, 
                         NSError *error)*/ 
[self.imageGenerator generateCGImagesAsynchronouslyForTimes:times completionHandler:^(CMTime requestedTime, 
                         CGImageRef cgImage, 
                         CMTime actualTime, 
                         AVAssetImageGeneratorResult result, 
                         NSError *error) 

{ 
    if (error) 
    { 
     KMSDebugLog(@"generateCGImagesAsynchronouslyForTimes Error: %@",error); 
     completionHandler(imagesArray); 
    } 
    else 
    { 
     if (cgImage) 
     { 
      UIImage *image = [UIImage imageWithCGImage:cgImage]; 

      //Orientation support 
      //UIImage *image = [UIImage imageWithCGImage:cgImage scale:1.0 orientation:videoOrientation]; 
      // NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer]; 
      UIImage *rotatedImage = image; 
      if(videoTransform.a == -1.0 && videoTransform.b == 0 && videoTransform.c == 0 && videoTransform.d == -1.0) 
      { 
       rotatedImage = [self imageRotatedByDegrees:image deg:180]; 
      } 

      [imagesArray addObject:rotatedImage]; 

     } 

     if (imagesArray.count == thumbnailCount) 
     { 
      dispatch_async(dispatch_get_main_queue(), ^{ 
       completionHandler(imagesArray); 
      }); 
     } 
    } 
}]; 
} 

錯誤

創建縮略圖我得到一個錯誤的

Line: 265, generateCGImagesAsynchronouslyForTimes Error: Error Domain=AVFoundationErrorDomain 
Code=-11829 "Cannot Open" UserInfo={NSLocalizedDescription=Cannot Open, 
NSUnderlyingError=0x176f08b0 {Error Domain=NSOSStatusErrorDomain Code=-12848 "(null)"}, 
NSLocalizedFailureReason=This media may be damaged.} 

我找不出這個問題，任何幫助將不勝感激。謝謝

Answer 1

我得到了答案。記錄完成後，我只是增加了一些延遲。

[self performSelector:@selector(UpdateVideoAndConfigureScreenForURL:) withObject:videoURL afterDelay:0.2];