Use Crystal Video Upscaler with Comfy Router

API Reference for fal/crystal-video-upscaler, served by Comfy Router from fal. Input: Video · Output: Video

Quick start

Create a key in your Comfy workspace and export it as COMFY_API_KEY. The Python and TypeScript snippets use the Comfy SDKs (pip install comfy-sdk and npm install @comfyorg/sdk); the cURL snippet is the same call over raw HTTP. Model ID: fal/crystal-video-upscaler Endpoint: POST https://api.comfy.org/v2/models/fal/crystal-video-upscaler

Wait for the result
Queue and collect later

from comfy_sdk import Comfy

# Reads COMFY_API_KEY from the environment.
# The SDK automatically creates an idempotency key and reuses it for automatic retries.
with Comfy() as client:
    result = client.models.run(
        "fal/crystal-video-upscaler",
        {
            "scale_factor": 2,
            "video_url": "https://storage.googleapis.com/falserverless/example_inputs/crystal_upscaler/video_upscaling/video_in.mp4",
        },
    )

print(result)

import { comfy } from "@comfyorg/sdk";

// Reads COMFY_API_KEY from the environment.
// The SDK automatically creates an idempotency key and reuses it for automatic retries.
const { data } = await comfy.models.run("fal/crystal-video-upscaler", {
  scale_factor: 2,
  video_url: "https://storage.googleapis.com/falserverless/example_inputs/crystal_upscaler/video_upscaling/video_in.mp4",
});

console.log(data);

curl https://api.comfy.org/v2/models/fal/crystal-video-upscaler \
  -H "X-API-Key: $COMFY_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d "{\"scale_factor\": 2, \"video_url\": \"https://storage.googleapis.com/falserverless/example_inputs/crystal_upscaler/video_upscaling/video_in.mp4\"}"

The same body, sent to POST https://api.comfy.org/v2/models/fal/crystal-video-upscaler/requests. Router answers 201 with a request_id as soon as the run is admitted, and the result is collected once it is ready, from this process or another one. Queued delivery walks through status, cancellation and collection.

import asyncio
from comfy_sdk import AsyncComfy

# Reads COMFY_API_KEY from the environment.
# Each submit() call mints its own Idempotency-Key and reuses it for automatic retries.
async def main():
    async with AsyncComfy() as client:
        handle = await client.models.submit(
            "fal/crystal-video-upscaler",
            {
                "scale_factor": 2,
                "video_url": "https://storage.googleapis.com/falserverless/example_inputs/crystal_upscaler/video_upscaling/video_in.mp4",
            },
        )
        print("request_id:", handle.request_id)  # with the model ID, all another process needs

        # Poll until the request completes, waiting the Retry-After the server names.
        async for update in handle.iter_events():
            print(update.status, update.queue_position)

        # The provider's own payload, the same value models.run() returns.
        # A request that failed or was cancelled raises the typed Router error here.
        result = await handle.get()

    print(result)

asyncio.run(main())

import { comfy } from "@comfyorg/sdk";

// Reads COMFY_API_KEY from the environment.
// Each submit() call mints its own Idempotency-Key and reuses it for automatic retries.
const handle = await comfy.models.submit("fal/crystal-video-upscaler", {
  scale_factor: 2,
  video_url: "https://storage.googleapis.com/falserverless/example_inputs/crystal_upscaler/video_upscaling/video_in.mp4",
});
console.log("requestId:", handle.requestId); // with the model ID, all another process needs

// Poll until the request completes, waiting the Retry-After the server names.
for await (const update of handle.events()) {
  console.log(update.status, update.queuePosition);
}

// The same result models.run() returns. A request that failed or was cancelled rejects here.
const result = await handle.get();

console.log(result.data);

# 1. Submit. Router answers 201 with request_id, status_url, response_url and cancel_url.
curl https://api.comfy.org/v2/models/fal/crystal-video-upscaler/requests \
  -H "X-API-Key: $COMFY_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d "{\"scale_factor\": 2, \"video_url\": \"https://storage.googleapis.com/falserverless/example_inputs/crystal_upscaler/video_upscaling/video_in.mp4\"}"

# 2. Poll until status is COMPLETED, waiting the Retry-After seconds each response names.
REQUEST_ID="<request_id from the 201 body>"
curl -i https://api.comfy.org/v2/models/fal/crystal-video-upscaler/requests/$REQUEST_ID/status \
  -H "X-API-Key: $COMFY_API_KEY"

# 3. Collect. 200 with the model's native output, 202 with the status body while it is still running.
curl https://api.comfy.org/v2/models/fal/crystal-video-upscaler/requests/$REQUEST_ID \
  -H "X-API-Key: $COMFY_API_KEY"

Schema

Input

number

default:"2"

Factor applied to each side of the input video. The upscaled video must not exceed 5K. fal bills per output megapixel per second, so the price grows with the square of this value.Range: 1 to 200

string

required

URL of the input video (MP4, MOV, WebM, M4V or GIF).

Generated from the schema Router serves at GET /v2/models/fal/crystal-video-upscaler/openapi.json, the same document it validates a call against before the request reaches the provider.

Output

object

required

The upscaled video file.

string

MIME type of the video file.

number

Duration of the video in seconds.

string

Name of the video file.

integer

Size of the video file in bytes.

number

Frame rate of the video.

integer

Height of the video in pixels.

integer

Number of frames in the video.

string

required

URL of the upscaled video.

integer

Width of the video in pixels.

Examples

Input

{
  "scale_factor": 2,
  "video_url": "https://storage.googleapis.com/falserverless/example_inputs/crystal_upscaler/video_upscaling/video_in.mp4"
}

Output

{
  "video": {
    "content_type": "video/mp4",
    "duration": 10,
    "file_name": "upscaled.mp4",
    "file_size": 3950551,
    "fps": 30,
    "height": 720,
    "num_frames": 300,
    "url": "https://example.invalid/fal/crystal-video-upscaler/upscaled.mp4",
    "width": 1280
  }
}

Before you ship

The SDKs create an Idempotency-Key and reuse it for automatic retries. For manual retries, reuse the original key. Router can hold the connection for up to 10 minutes. When a request fails, Router sends an X-Comfy-Error-Type response header explaining why. A 422 means Router rejected the input before calling the provider, and a 413 means the request body was larger than Router accepts. Download generated assets promptly because result URLs can expire. Any size limit named in a field description above is the provider’s own bound on that field, quoted from the provider’s specification. Router applies a separate cap to the whole request body, which base64-encoded media counts against: see request body size. This page documents one partner model called through Comfy Router. The same comfy-sdk / @comfyorg/sdk package also ships a second client, for running a whole ComfyUI workflow graph on Comfy Cloud: Comfy(api_key=...) / new Comfy({ apiKey }), with client.workflows, client.assets and client.jobs. See Comfy SDKs.

Headers

Authentication, idempotency, request IDs, error buckets, retry pacing, spend limits.

Using the Router API

Model discovery, validation errors, retries, and billing.

Limitations

What Router does not do today, and what to use instead.

Develop with Comfy

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Comfy CLI

Specifications

Use Crystal Video Upscaler with Comfy Router

Quick start

Schema

Input

Output

Examples

Input

Output

Before you ship

Headers

Using the Router API

Limitations

​Quick start

​Schema

​Input

​Output

​Examples

​Input

​Output

​Before you ship

Headers

Using the Router API

Limitations

Quick start

Schema

Input

Output

Examples

Input

Output

Before you ship