Offloading FFmpeg with Cloudflare

You can do this all in fly.io, no cloudflare container needed.

The whole selling point of fly is lightweight and fast VMs that can be "off" when not needed and start on-request. For this, I would:

Set up a "peformance" instance, with auto start on, and auto-restart-on-exit _off_, which runs a simple web service which accepts an incoming request, does the processing and upload, and then exits. All you need is the fly config, dockerfile, and service code (e.g. python). A simple webapp like that which only serves to ffmpeg something, can start very fast (ms). Something which needs to load e.g. a bigger model such as whisper can also still work, but will be a bit slower.

(In my use case: app where people upload audio, to have it transcribed with whisper. I would send a ping from the frontend to the "whisper" service even before the file finished uploading, saying "hey wake up, there's audio coming soon", and it was started by the time the audio was actually available. Worked great.)

I would not suggest using cloudflare containers for ffmpeg. Feels like it is the nost expensive product they have. Queue to aws spot instances or just have dedicated hetzner machine

Ffmpeg.WASM is really good and might manage all these steps before even uploading.