func: AVFrame *avcodec_alloc_frame(void)
  
  {
  
      AVFrame *frame = av_mallocz(sizeof(AVFrame));
  
  
  
      if (frame == NULL)
  
          return NULL;
  
  
  
  FF_DISABLE_DEPRECATION_WARNINGS
  
      avcodec_get_frame_defaults(frame);
  
  FF_ENABLE_DEPRECATION_WARNINGS
  
  
  
      return frame;
  
  }
  