I updated to next.js 15 and got an error.

[agent-Y]

I get error at await ffmpeg.load();

Build Error
Next.js (15.0.1) out of date (learn more) (Turbopack)
Failed to compile

./node_modules/@ffmpeg/ffmpeg/dist/esm/classes.js:104:28
Module not found
  102 |         if (!this.#worker) {
  103 |             this.#worker = classWorkerURL ?
> 104 |                 new Worker(new URL(classWorkerURL, import.meta.url), {
      |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  105 |                     type: "module",
  106 |                 }) :
  107 |                 // We need to duplicated the code here to enable webpack

https://nextjs.org/docs/messages/module-not-found
This error occurred during the build process and can only be dismissed by fixing the error.

[mrblackoutz]

I’m experiencing the same issue here. It was already mentioned in this issue: #72397.

[interactda]

Is there anyway to work around this?

[jswhisperer]

Haven't tested but looks like you need to declare ffmpeg as an external so it doesn't get bundled twice
https://webpack.js.org/configuration/externals/

[interactda]

Haven't tested but looks like you need to declare ffmpeg as an external so it doesn't get bundled twice https://webpack.js.org/configuration/externals/

I think the issue is with turbopack rather than webpack

[jswhisperer]

https://nextjs.org/docs/app/api-reference/config/next-config-js/serverExternalPackages ?

[484Irgang]

Same issue here. Unfortunately, setting this package as serverExternalPackage in next.config does not resolve the problem. I'm still encountering the following error:

./node_modules/@ffmpeg/ffmpeg/dist/esm/classes.js:104:28
Module not found: Can't resolve "< dynamic >"
102 | if (!this.#worker) {
103 | this.#worker = classWorkerURL ?
104 | new Worker(new URL(classWorkerURL, import.meta.url), {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
105 | type: "module",
106 | }) :
107 | // We need to duplicate the code here to enable webpack

As mentioned in this comment, it seems that import.meta.url is causing compatibility issues with Turbopack.

[TexLuciano]

Error: ffmpeg.wasm does not support nodejs
at new FFmpeg (file:///C:/br-contant/bear4/node_modules/@ffmpeg/ffmpeg/dist/esm/empty.mjs:4:15)
at C:\br-contant\bear4.next\server\chunks\ssr[root of the server]__854184._.js:755:24

I try use external import but not working someone resolve this issue?

[asp3]

If anyone runs into this, you can fix this by just turning off ffmpeg in dev mode

ffmpeg.wasm/packages/ffmpeg/src/classes.ts

Line 187 in 63ea4cc

public load = (

    /**
     * Loads ffmpeg-core inside web worker. It is required to call this method first
     * as it initializes WebAssembly and other essential variables.
     *
     * @category FFmpeg
     * @returns `true` if ffmpeg core is loaded for the first time.
     */
    load = ({ classWorkerURL, ...config } = {}, { signal } = {}) => {
        if (process.env.APP_ENV === "local") {
            return Promise.resolve(true);
        }