s.i2vgen_xl.pipeline_i2vgen_xl.I2VGenXLPipelineOutput 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 image-to-video generation with I2VGenXLPipeline.  Examples:   Copied >>> import torch
>>> from diffusers import I2VGenXLPipeline
>>> from diffusers.utils import export_to_gif, load_image

>>> pipeline = I2VGenXLPipeline.from_pretrained("ali-vilab/i2v