fPipelineOutput 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:  encode_prompt  < source > ( prompt device num_images_per_prompt do_classifier_free_guidance negative_prompt = None prompt_embeds: Optional = None negative_prompt_embeds: Optional = None lora_scale: Optional = None clip_skip: Optional = None  )   Parameters   prompt