audio to text

typescript/audio2text/README.md

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+# Audio to text
+
+Sequence used to transcript audio file to a text using AssemblyAi api.
+
+For now this sequence lets transcript only file that is in a dist folder
+
+## Prerequirements
+
+To run this sequence it is required to have own api key from [AssemblyAi](https://www.assemblyai.com)
+
+
+## Running
+
+> ❗ Remember to [setup transform-hub locally](https://docs.scramjet.org/platform/self-hosted-installation) or use the [platform's environment](https://docs.scramjet.org/platform/quick-start) for the sequence deployment.
+
+Open the terminal and run the following commands:
+
+```bash
+# install dependencies
+npm install
+
+# transpile TS->JS to dist/
+npm run build
+
+# make a compressed package with Sequence
+si seq pack dist
+
+# send Sequence to transform hub, this will output Sequence ID
+si seq send dist.tar.gz
+
+# start a Sequence, provide AssemblyAi-key as an argument parameter
+si seq start - --args [\"AssemblyAi-key\"]
+```
+
+To get a output:
+
+```bash
+si inst stdout -
+
+```

typescript/audio2text/package.json

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+{
+  "name": "audio2text",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "postbuild": "cp -r package.json dist/ && (cd dist && npm i --omit=dev) && cp src/utils/song.wav dist/utils ",
+    "pack": "si seq pack dist/",
+    "clean": "rm -rf ./dist ./*.tar.gz"
+  },
+  "keywords": [
+    "API",
+    "Tranform"
+  ],
+  "author": "piotrek6641",
+  "license": "ISC",
+  "dependencies": {
+    "@scramjet/utility": "^0.33.5",
+    "axios": "^1.3.6",
+    "date-and-time": "^2.4.3",
+    "typescript": "^5.0.4"
+  },
+  "devDependencies": {
+    "@scramjet/types": "0.33.5",
+    "@types/node": "^20.2.3"
+  }
+}

typescript/audio2text/src/index.ts

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+import { ReadableApp } from "@scramjet/types";
+import { Assembly } from "./utils/assembly";
+
+const app: ReadableApp<any> = async function(
+    _stream,
+    token:string
+    ) {
+    const assembly = new Assembly(token);
+
+    await assembly.processFile();
+
+    return Promise.resolve("finished");
+};
+
+export default app;

typescript/audio2text/src/utils/assembly.ts

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+/* eslint-disable no-console */
+import axios, { AxiosInstance } from "axios";
+import { defer } from "@scramjet/utility";
+import { readFile } from "fs";
+import path from "path";
+
+
+export class Assembly {
+    //path to file change song.wav to name of your file
+    //file has to be in a same directory
+    file = path.join(__dirname, "song.wav");
+    fileUrl:string = "";
+    status:string = "";
+    transciptId:string = "";
+    token:string;
+    client:AxiosInstance;
+    constructor(token:string) {
+        this.token = token;
+        this.client = axios.create({
+            baseURL: "https://api.assemblyai.com/v2",
+            headers: {
+                authorization: this.token, //conf.apiKey,
+                "transfer-encoding": "chunked",
+            },
+        });
+    }
+    private async upload(): Promise<string> {
+        return new Promise((resolve, reject) => {
+            readFile(this.file, async (err, data) => {
+                if (err) reject(err);
+
+                await this.client
+                    .post("/upload", data)
+                    .then((res) => {
+                        this.fileUrl = res.data.upload_url;
+                        resolve("succesfully uploaded");
+                    })
+                    .catch((error) => console.error(error));
+            });
+        });
+    }
+    private async startTranscript():Promise<void> {
+        await this.client
+            .post("/transcript", {
+                audio_url: this.fileUrl
+            })
+            .then((res) => { this.transciptId = res.data.id; });
+    }
+    private async transcript():Promise<string> {
+        return new Promise(async (resolve, _reject) => {
+            while (this.status !== "completed") {
+                this.client
+                    .get(`/transcript/${this.transciptId}`)
+                    // eslint-disable-next-line no-loop-func
+                    .then((res) => {
+                        if (res.data.status === "completed") {
+                            resolve(res.data.text);
+                        } else {
+                            console.log(res.data.status + "...");
+                            this.status = res.data.status;
+                        }
+                    })
+                    .catch(console.error);
+
+                await defer(3000);
+            }
+        });
+    }
+    async processFile():Promise<void> {
+        await this.upload();
+        await this.startTranscript();
+        await this.transcript().then(console.log);
+    }
+}
+

typescript/audio2text/tsconfig.json

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+{
+  "compilerOptions": {
+    "lib": [ "ESNext" ],
+    "target": "ESNext",
+    "module": "CommonJS",
+    "outDir": "./dist",
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+  }
+
+}