create-snapshot.ts

import { put } from "@vercel/blob";
import { addBundleToSandbox, createSandbox } from "@remotion/vercel";
import { bundleRemotionProject } from "./src/app/api/render/helpers";

const getSnapshotBlobKey = () =>
  `snapshot-cache/${process.env.VERCEL_DEPLOYMENT_ID ?? "local"}.json`;

const sandbox = await createSandbox({
  onProgress: ({ progress, message }) => {
    const pct = Math.round(progress * 100);
    console.log(`[create-snapshot] ${message} (${pct}%)`);
  },
});

console.log("[create-snapshot] Adding Remotion bundle...");
bundleRemotionProject(".remotion");
await addBundleToSandbox({ sandbox, bundleDir: ".remotion" });

console.log("[create-snapshot] Taking snapshot...");
const snapshot = await sandbox.snapshot({ expiration: 0 });
const { snapshotId } = snapshot;

await put(getSnapshotBlobKey(), JSON.stringify({ snapshotId }), {
  access: "public",
  contentType: "application/json",
  addRandomSuffix: false,
});

console.log(`[create-snapshot] Snapshot saved: ${snapshotId} (never expires)`);