code: def __getitem__(self, index):
      ann = self.annotation[index]
  
      vname = ann["video_path"]
      video_path = os.path.join(self.vis_root, vname)
  
      try:
          video = self.vis_processor(
              video_path,
              start_sec=ann["start_time"],
              end_sec=ann["end_time"],
          )
      except:
          return None
      caption = self.text_processor(ann["statement"])
  
      # "image_id" is kept to stay compatible with the COCO evaluation format
      return {
          "video": video,
          "text_input": self.text_processor(caption),
          "image_id": ann["source"],
          "instance_id": ann["instance_id"],
      }
  
imports: import os
  import random
  from lavis.datasets.datasets.base_dataset import BaseDataset
  from lavis.datasets.datasets.multimodal_classification_datasets import MultimodalClassificationDataset
  from lavis.datasets.datasets.caption_datasets import CaptionDataset
label_desc: Use image node_id 2 for calling the ViolinVideoCaptionDataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: dict, None