Wan Chunked I2V Sampler ♾️

WanChunkedI2VSampler

All-in-one chunked video generator for Wan I2V models. Set total_frames and chunk_frames — the node handles everything: encode → sample → decode → extract reference → repeat. Supports single-pass (one model) or two-pass (connect model_b). FLF (First-Last-Frame): Connect an end_image to make the video transition toward a target end frame. For multi-chunk videos, set end_blend_chunks (e.g. 9–17) for a smooth crossfade overlap. Uses the proven concat approach: each chunk's first frame naturally matches the previous chunk's last frame, so we just drop it and concatenate. Requires: ComfyUI-WanVideoWrapper

Pack: ComfyUI_VideoChunkTools

custom_nodes.ComfyUI_VideoChunkTools

Inputs (34)

Name	Type	Required
model	WANVIDEOMODEL	required
vae	WANVAE	required
start_image	IMAGE	required
total_frames	INT	required
chunk_frames	INT	required
width	INT	required
height	INT	required
keep_proportion	COMBO	required
crop_position	COMBO	required
steps	INT	required
cfg	FLOAT	required
shift	FLOAT	required
seed	INT	required
force_offload	BOOLEAN	required
scheduler	COMBO	required
enable_vae_tiling	BOOLEAN	required
model_b	WANVIDEOMODEL	optional
split_step	INT	optional
cfg_b	FLOAT	optional
text_embeds	WANVIDEOTEXTEMBEDS	optional
text_embed_sequence	TEXT_EMBED_SEQUENCE	optional
clip_embeds	WANVIDIMAGE_CLIPEMBEDS	optional
feta_args	FETAARGS	optional
context_options	WANVIDCONTEXT	optional
noise_aug_strength	FLOAT	optional
start_latent_strength	FLOAT	optional
end_latent_strength	FLOAT	optional
riflex_freq_index	INT	optional
tile_x	INT	optional
tile_y	INT	optional
tile_stride_x	INT	optional
tile_stride_y	INT	optional
end_image	IMAGE	optional
end_blend_chunks	INT	optional

Outputs (3)

Name	Type
video	IMAGE
total_frames	INT
chunks_generated	INT