put of the pre-final layer will be used for computing the prompt embeddings.   Returns 
TextToVideoSDPipelineOutput or tuple
  
If return_dict is True, TextToVideoSDPipelineOutput is
returned, otherwise a tuple is returned where the first element is a list with the generated frames.
  The call function to the pipeline for generation.  Examples:   Copied >>> import torch
>>> from diffusers import TextToVideoSDPipeline
>>> from diffusers.utils im