Causal 3d convolusion.

Causal self-attention with a single head.

`FlowDPMSolverMultistepScheduler` is a fast dedicated high-order solver for diffusion ODEs. This model inherits from [`SchedulerMixin`] and [

`UniPCMultistepScheduler` is a training-free framework designed for the fast sampling of diffusion models. This model inherits from [`Schedu

Callback to update the embedding of special tokens Only the special tokens are updated, the rest of the embeddings are kept fixed

XLMRobertaModel with no pooler and no LM head.

r""" Wan diffusion backbone supporting both text-to-video and image-to-video.