Description
Describe the issue
I have a working flow to run a segmentation model on pictures, and I'm trying to move this part of the code to a Web Worker. However, I have an error when creating the session, I believe because the dynamic import fails : WorkerGlobalScope.fetch: /_next/static/media/ort-wasm-simd-threaded.jsep.8296b855.wasm is not a valid URL.
Here is how I'm creating the Worker
const analyser = useRef<Worker>(undefined);
useEffect(
() => {
const worker = new Worker(new URL("analyser.ts", import.meta.url))
worker.onmessage = (e) => {
console.log("Receive message from analyser", e.data);
};
worker.postMessage("Hi");
analyser.current = worker;
return () => {
analyser.current?.terminate();
};
},
[]
);And here is the piece of code from analysis.ts that causes the problem
import { Tensor } from 'onnxruntime-web';
import * as ort from 'onnxruntime-web';
import { Jimp, JimpInstance } from "jimp";
import { Analysis } from "./utils";
self.onmessage = async (e) => {
console.log("Analyser received", e.data);
await runAnalysis(e.data, () => {}, () => {console.log("Analysis updated from worker")});
}
export async function runAnalysis(files: File[], setMask: (m: any) => void, setAnalysisResults: (m: Analysis[]) => void) {
// BREAKS HERE
const session = await ort.InferenceSession.create('/segmentation.onnx', { executionProviders: ['wasm'], graphOptimizationLevel: 'all' });
console.log('Inference session created');
for (const file of files) {
const { resized, mask } = await runSegmentation(URL.createObjectURL(file), session);
// SNIP
}
}The exact same code works when running not in a web worker, do you know what is happening ?
To reproduce
This is a very basic NextJS project, created with npx create-next-app@latest.
Then simply run npm install onnxruntime-web.
Create a analyse.ts file in the src directory.
Then edit the page.tsx's Home function to add the above code, which creates the Worker and posts a message.
Urgency
No response
ONNX Runtime Installation
Released Package
ONNX Runtime Version or Commit ID
onnxruntime-web@1.22.0
Execution Provider
'wasm'/'cpu' (WebAssembly CPU)