Mux

Documentation from muxinc/mux-convex-component, recorded October 23, 2026. APIs and setup may differ in the Bijection adaptation.

Mux Convex Component

A reusable Convex component for apps that use Mux for video. Sync your Mux video data with Convex and build video apps with a real-time database backing your catalog.

This package gives you:

• Convex tables for Mux assets, uploads, liveStreams, and events
• Mutations to upsert/delete synced Mux objects
• App-level videoMetadata storage (userId, title, visibility, tags, custom fields)
• Query helpers for catalog and user-facing video data
• A separate companion CLI package, @mux/convex-mux-init, to scaffold app-level Convex wrappers (npx convex-mux-init)

Quickstart

1) Install packages

Copy codenpm i @mux/convex @mux/mux-node
npm i -D @mux/convex-mux-init

If you prefer not to install the scaffold CLI, you can run it directly with npx:

Copy codenpx @mux/convex-mux-init@latest --component-name mux

2) Generate app-level Convex files

Copy codenpx convex-mux-init --component-name mux

# or without installing it
npx @mux/convex-mux-init@latest --component-name mux

This creates:

• convex/convex.config.ts
• convex/migrations.ts
• convex/muxWebhook.ts
• convex/muxHttp.ts
• convex/http.ts if your app does not already have one

If files already exist, the CLI skips them unless you pass --force. Existing convex/http.ts is never overwritten.

3) Set Mux API env vars in Convex

Copy codenpx convex env set MUX_TOKEN_ID <your_mux_token_id>
npx convex env set MUX_TOKEN_SECRET <your_mux_token_secret>

4) Start Convex and run backfill

Copy codenpx convex dev
npx convex run migrations:backfillMux '{}'

5) Register the webhook route

If npx convex-mux-init created convex/http.ts for you, this is already done.

If your app already had convex/http.ts, wire the generated helper into your existing router:

Copy codeimport { httpRouter } from "convex/server";
import { registerMuxHttpRoutes } from "./muxHttp";

const http = httpRouter();

registerMuxHttpRoutes(http);

export default http;

6) Configure Mux webhook endpoint

In the Mux dashboard, create a webhook endpoint:

• URL for deployed app: https://<your-deployment>.convex.site/mux/webhook
• URL for local development: use a tunnel (e.g. ngrok or cloudflared) to /mux/webhook

Copy the webhook signing secret and set it in Convex:

Copy codenpx convex env set MUX_WEBHOOK_SECRET <your_mux_webhook_secret>

7) Verify data in Convex dashboard

Tables to check:

• assets
• uploads
• liveStreams
• events
• videoMetadata

Why both backfill and webhook?

• Backfill is a one-time catch-up for existing Mux objects.
• Webhooks keep your Convex tables updated in near real time as Mux state changes.

Without webhooks, data will drift over time.

Runtime model

This follows Convex component best practices:

• @mux/convex is component-only (schema, queries, mutations)
• Node runtime integration (Mux SDK, webhook verification, backfill) lives in app-level code in your project
• @mux/convex-mux-init is the separate CLI package that scaffolds those app-level files for you

Using a different component name

If you mount with a different name, for example:

Copy codeapp.use(mux, { name: "videoInfra" });

Then regenerate wrappers with the matching name:

Copy codenpx convex-mux-init --component-name videoInfra --force

Common commands

Copy code# regenerate wrappers
npx convex-mux-init --component-name mux --force

# run backfill with options
npx convex run migrations:backfillMux '{"maxAssets":500,"defaultUserId":"dev-user-1","includeVideoMetadata":true}'

# run against prod deployment
npx convex run --prod migrations:backfillMux '{"maxAssets":500}'

Troubleshooting

• Could not find function for 'migrations:backfillMux': Ensure convex/migrations.ts exists and exports backfillMux, then run npx convex dev.
• InvalidReference ... does not export [mux_node.backfillAssets]: Do not call components.<name>.mux_node.* directly. Use the app-level wrappers generated by npx convex-mux-init.
• TypeScript webhooks.unwrap ... Record<string, unknown>: Regenerate wrappers with npx convex-mux-init --force.
• TypeScript request.headers.entries is not a function/property: Build headers with request.headers.forEach(...) in convex/muxHttp.ts.
• Webhooks route compiles but never updates tables: If ingestMuxWebhook is generated as internalAction, call it via internal.muxWebhook.ingestMuxWebhook (not anyApi.*).
• Node APIs without "use node": Ensure Node runtime files start with "use node";.
• Bundling fails on node:fs / node:path from @mux/convex/bin/*: Upgrade to the split packages and use @mux/convex-mux-init as the separate scaffold CLI.