video concat

package.json

@@ -11,6 +11,7 @@
     "test:coverage": "NODE_ENV=test jest --coverage --detectOpenHandles --no-cache",
     "lint": "eslint --fix",
     "prettier": "prettier './src' --write",
+    "run:concat": "nodemon ./src/concat.ts",
     "run:mp3": "nodemon ./src/mp3.ts",
     "run:mp3-opening": "nodemon ./src/mp3-opening.ts"
   },
@@ -55,6 +56,7 @@
   "devDependencies": {
     "@tsconfig/recommended": "^1.0.2",
     "@types/dotenv": "^8.2.0",
+    "@types/ffmpeg-concat": "^1.1.2",
     "@types/jest": "^29.2.5",
     "@types/markdown-it": "^12.2.3",
     "@types/node": "^18.11.18",
@@ -63,6 +65,7 @@
     "eslint": "8.23.1",
     "eslint-config-prettier": "^8.6.0",
     "eslint-plugin-prettier": "^4.2.1",
+    "ffmpeg-concat": "^1.3.0",
     "husky": "^8.0.3",
     "jest": "^29.3.1",
     "lint-staged": "^13.1.0",

src/concat.ts

@@ -0,0 +1,27 @@
+import concat from 'ffmpeg-concat'
+import { join } from 'path'
+import { CONFIG } from 'utils/config'
+
+async function run() {
+  const out = join(CONFIG.OUTPUT_FOLDER, 'mp4', 'out.mp4')
+  const intro = join(CONFIG.INPUT_FOLDER, 'intro.mp4')
+  const video = join(CONFIG.INPUT_FOLDER, 'video.mp4')
+
+  await concat({
+    output: out,
+    videos: [intro, video],
+    transition: {
+      name: 'directionalwipe', // Options: fade, directionalwipe, circleopen, squareswire
+      duration: 750,
+    },
+  })
+}
+
+run()
+  .then(() => {
+    process.exit(0)
+  })
+  .catch((err) => {
+    console.log(err)
+    process.exit(1)
+  })

src/utils/config.ts

@@ -6,6 +6,7 @@ dotenv.config()
 export const CONFIG = {
   NODE_ENV: process.env.NODE_ENV || 'development',
 
+  INPUT_FOLDER: process.env.INPUT_FOLDER || join(process.cwd(), 'input'),
   OUTPUT_FOLDER: process.env.OUTPUT_FOLDER || join(process.cwd(), 'output'),
   BITRATE: process.env.BITRATE || 128,