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H3-LongVideos
=============
Make long (up to ~120s) MiniMax-H3 videos from a single prompt + a single
length, in ComfyUI.
Nodes:
* H3 Long Videos (sampler.py) - one prompt + shot length -> video+audio,
covering BOTH H3 conditioning tasks:
FL2VA (first/last frame anchors the shot)
and REF2VA (reference images condition on
what a character looks like). Connect no
ref_image_* and it is pure FL2VA.
(set plan_only=True to PREVIEW the shot
split using the node's own settings, no
render -- replaces the old Plan node)
* H3 Shot Length (shot_length.py) - one shot length as seconds AND a valid
H3 frame count (17k+5 grid, 362 cap);
wire `seconds` -> the sampler and
`frames` -> a preview override
* H3 Model Inspector (inspector.py) - report base precision (BF16/FP8/NVFP4/MXFP8)
and whether this card runs it natively
Sizing: the sampler's `resolution` preset supplies the ASPECT RATIO and its
`megapixels` widget supplies the SIZE (1 MP = 1024x1024, ComfyUI's own
convention). At 1.00MP every native preset reproduces its own dimensions.
Scaling from the preset rather than a nominal ratio is what makes that exact --
1344x768 is 1.750, i.e. 7:4, NOT 16:9 (1.778), and 1536x672 is 16:7, not 21:9.
Set megapixels to 0 to use the preset's dimensions verbatim.
The sampler registers under four keys -- H3LongVideos, H3LongVideosFL2VA,
H3LongVideosV1 and H3LongVideosREF2VA -- all aliases onto the same class, so every
workflow saved under any previous name keeps loading. REF2VA was briefly a second,
duplicated sampler; it was 94% the same file, every shared fix had to be made
twice, and one such mirror silently emitted a clause twice. It is now folded in.
Install: put this whole folder in ComfyUI/custom_nodes/ and restart ComfyUI.
"""
from .sampler import NODE_CLASS_MAPPINGS as _s_c, NODE_DISPLAY_NAME_MAPPINGS as _s_d
from .shot_length import NODE_CLASS_MAPPINGS as _sl_c, NODE_DISPLAY_NAME_MAPPINGS as _sl_d
from .inspector import NODE_CLASS_MAPPINGS as _i_c, NODE_DISPLAY_NAME_MAPPINGS as _i_d
NODE_CLASS_MAPPINGS = {**_s_c, **_sl_c, **_i_c}
NODE_DISPLAY_NAME_MAPPINGS = {**_s_d, **_sl_d, **_i_d}
# No WEB_DIRECTORY: the only frontend script was autoshift.js, which wrote
# auto-derived flow shifts back into the widgets. auto_shift is gone -- its premise
# was wrong for distilled LoRAs -- and nothing else here needs a browser-side hook.
__all__ = ["NODE_CLASS_MAPPINGS", "NODE_DISPLAY_NAME_MAPPINGS"]
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