IOS批量截取视频截图UIImagemp4IOSVideo

• IOS批量截取视频截图
  

  //生成截图

  NSString *path = [NSHomeDirectory() stringByAppendingString:@"/Documents"];

  NSLog(@"path %@", path);

  for (int i = 0; i<[mItems count]; i++) {

  NSMutableDictionary *info = (NSMutableDictionary *)mItems[i]; //视频信息

  NSString *mediaPath;

  mediaPath = [[NSBundle mainBundle] pathForResource:[info objectForKey:@"mediaName"]

  ofType:[info objectForKey:@"type"]];

  UIImage *image = [self getImage:mediaPath];

  [UIImageJPEGRepresentation(image, 1) writeToFile:[path stringByAppendingPathComponent:[NSString stringWithFormat:@"file%d.jpg", i]] atomically:YES];

  }

  
  

  // 获取指定位置的视频的截屏

  -(UIImage *)getImage:(NSString *)videoURL{

  AVURLAsset *asset = [[AVURLAssetalloc] initWithURL:[NSURLfileURLWithPath:videoURL] options:nil];

  AVAssetImageGenerator *gen = [[AVAssetImageGeneratoralloc] initWithAsset:asset];

  gen.appliesPreferredTrackTransform =YES;

  CMTime time =CMTimeMakeWithSeconds(20.5,600); // 参数( 截取的秒数， 视频每秒多少帧)

  NSError *error = nil;

  CMTime actualTime;

  CGImageRef image = [gen copyCGImageAtTime:time actualTime:&actualTime error:&error];

  UIImage *thumb = [[UIImagealloc] initWithCGImage:image];

  CGImageRelease(image);

  return thumb;

  }

  
  

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