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[V3] convert Cosmos nodes to V3 schema #9721

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Sep 12, 2025
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[V3] convert Cosmos nodes to V3 schema #9721

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129 changes: 72 additions & 57 deletions comfy_extras/nodes_cosmos.py
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Original file line number Diff line number Diff line change
@@ -1,25 +1,32 @@
from typing_extensions import override
import nodes
import torch
import comfy.model_management
import comfy.utils
import comfy.latent_formats

from comfy_api.latest import ComfyExtension, io

class EmptyCosmosLatentVideo:
@classmethod
def INPUT_TYPES(s):
return {"required": { "width": ("INT", {"default": 1280, "min": 16, "max": nodes.MAX_RESOLUTION, "step": 16}),
"height": ("INT", {"default": 704, "min": 16, "max": nodes.MAX_RESOLUTION, "step": 16}),
"length": ("INT", {"default": 121, "min": 1, "max": nodes.MAX_RESOLUTION, "step": 8}),
"batch_size": ("INT", {"default": 1, "min": 1, "max": 4096})}}
RETURN_TYPES = ("LATENT",)
FUNCTION = "generate"

CATEGORY = "latent/video"
class EmptyCosmosLatentVideo(io.ComfyNode):
@classmethod
def define_schema(cls) -> io.Schema:
return io.Schema(
node_id="EmptyCosmosLatentVideo",
category="latent/video",
inputs=[
io.Int.Input("width", default=1280, min=16, max=nodes.MAX_RESOLUTION, step=16),
io.Int.Input("height", default=704, min=16, max=nodes.MAX_RESOLUTION, step=16),
io.Int.Input("length", default=121, min=1, max=nodes.MAX_RESOLUTION, step=8),
io.Int.Input("batch_size", default=1, min=1, max=4096),
],
outputs=[io.Latent.Output()],
)

def generate(self, width, height, length, batch_size=1):
@classmethod
def execute(cls, width, height, length, batch_size=1) -> io.NodeOutput:
latent = torch.zeros([batch_size, 16, ((length - 1) // 8) + 1, height // 8, width // 8], device=comfy.model_management.intermediate_device())
return ({"samples": latent}, )
return io.NodeOutput({"samples": latent})


def vae_encode_with_padding(vae, image, width, height, length, padding=0):
Expand All @@ -33,31 +40,31 @@ def vae_encode_with_padding(vae, image, width, height, length, padding=0):
return latent_temp[:, :, :latent_len]


class CosmosImageToVideoLatent:
class CosmosImageToVideoLatent(io.ComfyNode):
@classmethod
def INPUT_TYPES(s):
return {"required": {"vae": ("VAE", ),
"width": ("INT", {"default": 1280, "min": 16, "max": nodes.MAX_RESOLUTION, "step": 16}),
"height": ("INT", {"default": 704, "min": 16, "max": nodes.MAX_RESOLUTION, "step": 16}),
"length": ("INT", {"default": 121, "min": 1, "max": nodes.MAX_RESOLUTION, "step": 8}),
"batch_size": ("INT", {"default": 1, "min": 1, "max": 4096}),
},
"optional": {"start_image": ("IMAGE", ),
"end_image": ("IMAGE", ),
}}

def define_schema(cls) -> io.Schema:
return io.Schema(
node_id="CosmosImageToVideoLatent",
category="conditioning/inpaint",
inputs=[
io.Vae.Input("vae"),
io.Int.Input("width", default=1280, min=16, max=nodes.MAX_RESOLUTION, step=16),
io.Int.Input("height", default=704, min=16, max=nodes.MAX_RESOLUTION, step=16),
io.Int.Input("length", default=121, min=1, max=nodes.MAX_RESOLUTION, step=8),
io.Int.Input("batch_size", default=1, min=1, max=4096),
io.Image.Input("start_image", optional=True),
io.Image.Input("end_image", optional=True),
],
outputs=[io.Latent.Output()],
)

RETURN_TYPES = ("LATENT",)
FUNCTION = "encode"

CATEGORY = "conditioning/inpaint"

def encode(self, vae, width, height, length, batch_size, start_image=None, end_image=None):
@classmethod
def execute(cls, vae, width, height, length, batch_size, start_image=None, end_image=None) -> io.NodeOutput:
latent = torch.zeros([1, 16, ((length - 1) // 8) + 1, height // 8, width // 8], device=comfy.model_management.intermediate_device())
if start_image is None and end_image is None:
out_latent = {}
out_latent["samples"] = latent
return (out_latent,)
return io.NodeOutput(out_latent)

mask = torch.ones([latent.shape[0], 1, ((length - 1) // 8) + 1, latent.shape[-2], latent.shape[-1]], device=comfy.model_management.intermediate_device())

Expand All @@ -74,33 +81,33 @@ def encode(self, vae, width, height, length, batch_size, start_image=None, end_i
out_latent = {}
out_latent["samples"] = latent.repeat((batch_size, ) + (1,) * (latent.ndim - 1))
out_latent["noise_mask"] = mask.repeat((batch_size, ) + (1,) * (mask.ndim - 1))
return (out_latent,)
return io.NodeOutput(out_latent)

class CosmosPredict2ImageToVideoLatent:
class CosmosPredict2ImageToVideoLatent(io.ComfyNode):
@classmethod
def INPUT_TYPES(s):
return {"required": {"vae": ("VAE", ),
"width": ("INT", {"default": 848, "min": 16, "max": nodes.MAX_RESOLUTION, "step": 16}),
"height": ("INT", {"default": 480, "min": 16, "max": nodes.MAX_RESOLUTION, "step": 16}),
"length": ("INT", {"default": 93, "min": 1, "max": nodes.MAX_RESOLUTION, "step": 4}),
"batch_size": ("INT", {"default": 1, "min": 1, "max": 4096}),
},
"optional": {"start_image": ("IMAGE", ),
"end_image": ("IMAGE", ),
}}
def define_schema(cls) -> io.Schema:
return io.Schema(
node_id="CosmosPredict2ImageToVideoLatent",
category="conditioning/inpaint",
inputs=[
io.Vae.Input("vae"),
io.Int.Input("width", default=848, min=16, max=nodes.MAX_RESOLUTION, step=16),
io.Int.Input("height", default=480, min=16, max=nodes.MAX_RESOLUTION, step=16),
io.Int.Input("length", default=93, min=1, max=nodes.MAX_RESOLUTION, step=4),
io.Int.Input("batch_size", default=1, min=1, max=4096),
io.Image.Input("start_image", optional=True),
io.Image.Input("end_image", optional=True),
],
outputs=[io.Latent.Output()],
)


RETURN_TYPES = ("LATENT",)
FUNCTION = "encode"

CATEGORY = "conditioning/inpaint"

def encode(self, vae, width, height, length, batch_size, start_image=None, end_image=None):
@classmethod
def execute(cls, vae, width, height, length, batch_size, start_image=None, end_image=None) -> io.NodeOutput:
latent = torch.zeros([1, 16, ((length - 1) // 4) + 1, height // 8, width // 8], device=comfy.model_management.intermediate_device())
if start_image is None and end_image is None:
out_latent = {}
out_latent["samples"] = latent
return (out_latent,)
return io.NodeOutput(out_latent)

mask = torch.ones([latent.shape[0], 1, ((length - 1) // 4) + 1, latent.shape[-2], latent.shape[-1]], device=comfy.model_management.intermediate_device())

Expand All @@ -119,10 +126,18 @@ def encode(self, vae, width, height, length, batch_size, start_image=None, end_i
latent = latent_format.process_out(latent) * mask + latent * (1.0 - mask)
out_latent["samples"] = latent.repeat((batch_size, ) + (1,) * (latent.ndim - 1))
out_latent["noise_mask"] = mask.repeat((batch_size, ) + (1,) * (mask.ndim - 1))
return (out_latent,)
return io.NodeOutput(out_latent)


class CosmosExtension(ComfyExtension):
@override
async def get_node_list(self) -> list[type[io.ComfyNode]]:
return [
EmptyCosmosLatentVideo,
CosmosImageToVideoLatent,
CosmosPredict2ImageToVideoLatent,
]


NODE_CLASS_MAPPINGS = {
"EmptyCosmosLatentVideo": EmptyCosmosLatentVideo,
"CosmosImageToVideoLatent": CosmosImageToVideoLatent,
"CosmosPredict2ImageToVideoLatent": CosmosPredict2ImageToVideoLatent,
}
async def comfy_entrypoint() -> CosmosExtension:
return CosmosExtension()
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