    def __call__(self, clip):
        """
        Args:
            clip (torch.tensor): Video clip to be cropped. Size is (T, C, H, W)
        Returns:
            torch.tensor: center cropped video clip.
                size is (T, C, crop_size, crop_size)
        """
        clip_center_crop = center_crop(clip, self.size)
        return clip_center_crop
Args:
clip (torch.tensor): Video clip to be cropped. Size is (T, C, H, W)
Returns:
torch.tensor: center cropped video clip.
size is (T, C, crop_size, crop_size)
opensora/dataset/transform.py