additional test for commands.txt and fix for correct path in the ffmpegExtractor module

.gitignore

@@ -962,3 +962,6 @@ app.*.symbols
 !**/ios/**/default.perspectivev3
 !/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
 !/dev/ci/**/Gemfile.lock
+
+#Storage files
+storage/

package-lock.json

@@ -0,0 +1,565 @@
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+      "license": "ISC",
+      "dependencies": {
+        "isexe": "^2.0.0"
+      },
+      "bin": {
+        "which": "bin/which"
+      }
+    },
+    "node_modules/yn": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
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+      "dev": true,
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+}

package.json

@@ -0,0 +1,15 @@
+{
+  "type": "module",
+  "dependencies": {
+    "cli-progress": "^3.12.0",
+    "ffmpeg-static": "^5.2.0",
+    "fluent-ffmpeg": "^2.1.3"
+  },
+  "devDependencies": {
+    "@types/cli-progress": "^3.11.6",
+    "@types/fluent-ffmpeg": "^2.1.28",
+    "@types/node": "^24.9.2",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.9.3"
+  }
+}

scripts/commands.txt

@@ -0,0 +1,5 @@
+npx ts-node ./extract.ts /Users/mikehughes/Downloads/Testvideo/Kurzgesagt.mov
+npx ts-node ./transcribe.ts ../storage/audio/Kurzgesagt.wav
+
+npx ts-node ./extract.ts /Users/mikehughes/Downloads/Testvideo/GitLabMeeting.mov
+npx ts-node ./transcribe.ts ../storage/audio/GitLabMeeting.wav

scripts/extract.ts

@@ -0,0 +1,23 @@
+#!/usr/bin/env ts-node
+
+import { extractAudioFromVideo } from "../services/modules/extraction/ffmpegExtractor.ts";
+
+const videoPath = process.argv[2];
+
+if (!videoPath) {
+  console.error("Usage: ts-node extractAudio.ts <videoPath>");
+  process.exit(1);
+}
+
+(async () => {
+  try {
+    console.log(`Extracting audio from: ${videoPath}`);
+
+    await extractAudioFromVideo(videoPath); // Call the extraction function (ffmpegExtractor.ts in services/modules/extraction)
+
+    console.log("Audio extraction completed successfully.");
+  } catch (err) {
+    console.error("Audio extraction failed:", err);
+    process.exit(1);
+  }
+})();

scripts/transcribe.ts

@@ -0,0 +1,18 @@
+import { whisperLocal } from "../services/modules/transcription/local/whisperLocal.ts";
+
+const audioPath = process.argv[2];
+if (!audioPath) {
+  console.error("Please provide an audio file path as argument.");
+  process.exit(1);
+}
+
+const whisper = new whisperLocal();
+
+(async () => {
+  try {
+    const text = await whisper.transcribe(audioPath);
+    console.log(text);
+  } catch (err) {
+    console.error("Transcription failed:", err);
+  }
+})();

services/modules/extraction/ffmpegExtractor.ts

@@ -0,0 +1,90 @@
+import ffmpegPath from 'ffmpeg-static';
+import ffmpeg from 'fluent-ffmpeg';
+import path from 'path';
+import fs from 'fs';
+import cliProgress from 'cli-progress';
+import { fileURLToPath } from 'url';
+
+// Base code reference: https://docs.yemreak.com/arsiv/programming/extract-audio-from-video-with-typescript-and-ffmpeg
+// Test command: npx ts-node ./extract.ts /path/to/video.mp4
+
+/**
+ * Extracts audio from a video file and saves it as WAV.
+ * @param videoFilePath Path to the input video file.
+ */
+
+// Ensure ffmpeg binary is available
+if (!ffmpegPath) {
+  throw new Error('FFmpeg binary not found!');
+}
+ffmpeg.setFfmpegPath(ffmpegPath);
+
+// Ensure an input video path is provided via CLI
+if (process.argv.length < 3) {
+  console.error('Usage: ts-node ./extract.ts <input-video-path>');
+  process.exit(1);
+}
+
+// Resolve __dirname equivalent in ESM
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+// Prepare output directory (always storage/audio under project root)
+const outputDir = path.join(__dirname, '..', '..', '..', 'storage', 'audio');
+if (!fs.existsSync(outputDir)) {
+  fs.mkdirSync(outputDir, { recursive: true });
+}
+
+// Derive input and output paths
+const inputVideoPath = process.argv[2];
+const inputVideoName = path.basename(inputVideoPath, path.extname(inputVideoPath));
+const outputAudioPath = path.join(outputDir, `${inputVideoName}.wav`);
+
+// Initialize CLI progress bar
+const progressBar = new cliProgress.SingleBar({
+  format: 'Processing |{bar}| {percentage}% | {timemark}',
+  barCompleteChar: '\u2588',
+  barIncompleteChar: '\u2591',
+  hideCursor: true
+});
+
+/**
+ * Extracts audio from a video using ffmpeg.
+ * - Converts video to WAV (16 kHz, Mono, PCM optional if needed)
+ * - Shows CLI progress bar
+ * - Handles errors gracefully (without errors)
+ */
+export function extractAudioFromVideo(videoFilePath: string): Promise<void> {
+  return new Promise((resolve, reject) => {
+    ffmpeg(videoFilePath)
+      .outputFormat('wav')
+      .audioCodec('pcm_s16le')
+      .audioChannels(1)
+      .audioFrequency(16000)
+      .on('progress', (progress) => {
+        if (!progressBar.isActive) progressBar.start(100, 0, { timemark: '00:00:00' });
+        if (progress.percent) {
+          progressBar.update(progress.percent, { timemark: progress.timemark });
+        }
+      })
+      .on('end', () => {
+        progressBar.update(100, { timemark: 'done' });
+        progressBar.stop();
+        console.log(`Extraction completed: ${outputAudioPath}`);
+        resolve();
+      })
+      .on('error', (err) => {
+        progressBar.stop();
+        console.error(`failed_audio_extraction: ${err.message}`);
+        reject(err);
+      })
+      .save(outputAudioPath);
+  });
+}
+
+// Run extraction if executed directly from CLI
+if (import.meta.url === `file://${process.argv[1]}`) {
+  extractAudioFromVideo(inputVideoPath)
+    .then(() => console.log('Audio extraction successful.'))
+    .catch((err) => console.error(err));
+}

services/modules/transcription/local/whisperLocal.ts

@@ -0,0 +1,55 @@
+import { exec } from "child_process"; // Node.js built-in module
+import path from "path"; // Path module
+import fs from "fs"; // File system module
+import { fileURLToPath } from "url"; // To handle __dirname in ES modules
+
+const __filename = fileURLToPath(import.meta.url); // Get current file path
+const __dirname = path.dirname(__filename); // Get current directory path
+const transcriptsDir = path.resolve(__dirname, "../../storage/transcriptions");
+
+
+export class whisperLocal { // is called by transcribe.ts
+  private whisperBinary: string; // Path to the whisper.cpp binary
+  private modelPath: string; // Path to the model file
+
+  constructor() {
+    this.whisperBinary = path.resolve(
+      __dirname,
+      "whisper.cpp/build/bin/whisper-cli" //Path to the compiled whisper binary
+    );
+
+    this.modelPath = path.resolve(
+      __dirname,
+      "whisper.cpp/models/ggml-base.en.bin" // Path to the English model file
+    );
+  }
+
+  async transcribe(audioPath: string): Promise<string> { //asyncronous function to transcribe audio
+    return new Promise((resolve, reject) => {
+        const transcriptsDir = path.resolve(__dirname, "../../../../storage/transcripts"); //storage directory for transcripts
+
+        if (!fs.existsSync(transcriptsDir)) { //if transcripts directory does not exist, create it
+            fs.mkdirSync(transcriptsDir, { recursive: true });
+        }
+
+        const outputBase = path.resolve( // Base path for output transcript files, name is same as audio file (video file)
+            transcriptsDir,
+            path.basename(audioPath, path.extname(audioPath))
+        );
+
+        const command = `"${this.whisperBinary}" -m "${this.modelPath}" -f "${audioPath}" -otxt -of "${outputBase}"`; // Command to execute whisper binary with model and audio file, outputting text file
+
+      exec(command, (error, stdout, stderr) => {
+        if (error) return reject(error);
+
+        const outputTxt = `${outputBase}.txt`;
+        if (fs.existsSync(outputTxt)) {
+          const transcript = fs.readFileSync(outputTxt, "utf8");
+          resolve(transcript);
+        } else {
+          reject(new Error("No transcript file found"));
+        }
+        });
+    });
+  }
+}