Nodes

All nodes appear under the H3 Continuity category.

H3 Timeline

The heart of the pack. Draw clips in the Studio; each queued run renders the next clip that needs it.

Input	Type	Notes
name	string	Folder under output/h3_sequences.
width, height	int	Output size.
context_frames	39, 90, 141	Frames each clip carries from the clip before (1.6 s, 3.75 s, 5.9 s).
carry_audio	boolean	Also carry and freeze the matching audio.
ref_image_size	match or max	Reference image sizing, as in MiniMax H3 Reference to Video.
audio_context_frames	int	Incoming audio context in 24 fps frames; 0 follows video.
timeline	string	The clips as JSON, written by the editor.
clip, vae, audio_vae	optional	H3 CLIP, video VAE and audio VAE. Without the audio VAE, @audio references only label the prompt.
images.imageN, videos.videoN, video_audios.…, audios.audioN	optional	Connected references.
negative	optional	Negative conditioning.
still_recipe	optional	A Still Recipe; video rendering never evaluates it.
story	optional	From H3 Story. Renders never wait for it.

Output	Type
positive, negative	CONDITIONING
latent	LATENT (empty audio+video latent to sample)
segment	H3C_SEGMENT (to H3 Save Segment)
seed	INT
prompt	STRING
info	STRING
image_1, image_2…	IMAGE, the clip's final <Picture N> pixels

H3 Story

Plans and writes the Timeline's prompts through an OpenAI-compatible API. Output: story. Settings are on the writer page. The writing_mode widget is retired (every Write uses Fast) and kept only so saved workflows load.

H3 Save Segment

Saves the run as the next segment (the finished video without repeated frames, plus latents for the next run) and then rebuilds the full video.

Input	Notes
segment, latent	From the Timeline and the sampler.
images, audio	Decoded frames and audio. Needed for the segment and full videos.
fps	24 unless you interpolate.
crf	H.264 quality; lower is better and larger.
color_space	HDR videos use 10-bit BT.2020.
description	Text stored with the segment, such as the prompt.
write_full_video	Only affects the deprecated H3 Sequence chain; the Timeline always exports when every clip is done.

H3 Context Windows, H3 Join Chain

For long clips. Context Windows wraps ComfyUI's MiniMax H3 Context Windows (model → model); Join Chain joins saved continuing segments into one latent for refinement.

Still nodes

Node	Purpose
Still Recipe	Wraps a native image generator's IMAGE output with bindings that say where its prompt, seed, size and references are. Connect it to the Timeline's still_recipe.
H3 Still Conditioning	Adapts a still generator invocation for pinned-source and reference presentation. Used inside the supplied H3 still examples.
Still Image Source	Supplies source pixels to a still request.
H3 Timeline Image	Resolved pixels for <Picture N> in the selected clip.

Deprecated

H3 Sequence and H3 Continue are the earlier chain-based way of continuing a sequence. Use H3 Timeline instead. They remain so old workflows load.