RuntimeError: abort(LinkError: WebAssembly.instantiate(): Import #258 module="a" function="Rd" error: function import requires a callable)

[willywwang]

Describe the bug Approximately 50% of the time we run into this issue in the console which prevents ffmpeg wasm from running.

Uncaught (in promise) RuntimeError: abort(LinkError: WebAssembly.instantiate(): Import #258 module="a" function="Rd" error: function import requires a callable). Build with -s ASSERTIONS=1 for more info.

We are using version 0.9.7 of @ffmpeg/ffmpeg.

How we are instantiating ffmpeg:

  const ffmpeg = createFFmpeg({ 
    log: false,   
    corePath: 'https://unpkg.com/@ffmpeg/[email protected]/dist/ffmpeg-core.js', 
  });

Note this issue did not occur before chrome implemented cross origin isolation requiring headers.

Things we have tried:

1. Updating to latest versions of @ffmpeg/ffmpeg + ffmpeg/core
2. Setting the core path manually

This issue does not occur when:

We remove Cross-Origin-Opener-Policy: same-origin and Cross-Origin-Embedder-Policy: require-corp headers, and launch chrome with flag to enable SharedBufferArray (but we can't really tell users of our app to run chrome with this flag on every time).

[Gyans93]

I am facing same issue. Was there any solution that worked for you?

[willywwang]

@Gyans93 unfortunately no solution was found, so we hosted our own ffmpeg solution using AWS lambda and calling it from there