Project Overview I have a Node.js–based media automation app that combines: * dynamic text * voice synthesis (TTS) * visual media * optional background audio into short rendered videos. The core backend and structure are already in place, along with a basic Lovable/Next.js frontend and a Google Sheets webhook for logging. I now need a developer to: * finish key backend pieces, * wire the APIs cleanly, * add robust batch support, and * handle background audio integration. All source files, examples, and documentation are included in a single handoff ZIP. --- Scope of Work 1. **Media Merge Engine** * Finalize the Node/FFmpeg pipeline (`merge.mjs`) that combines: * primary video * TTS audio * optional secondary background audio * text overlay * Output: 2 aspect ratios (portrait + landscape). 2. **Batch Processing** * Validate and improve `run-batch.mjs` for CSV-driven jobs. * Add proper logging, error handling, and concurrency control. 3. **Text & Voice** * Ensure the system accepts a user-supplied `text` field that: * can be used for overlay, and * can be sent to a TTS API for narration. * Integrate one TTS provider via API key (already stubbed in the code). 4. **Background Audio (Music)** * Support an optional secondary audio track in three ways: 1. **User-supplied file:** `music` path in request/CSV. 2. **Internal audio assets:** `musicTrackId` mapped to files under `/music`. 3. **External generator:** optional call to an audio generation API when `generateMusic = true` (e.g., using `musicStyle` or similar fields). * Mix background audio under the main voice with: * lower volume * gentle fade-in/fade-out * simple ducking if necessary. 5. **Frontend (Lovable / Next.js)** * Connect existing frontend placeholders to backend endpoints: * `/composer` – single job * `/batch` – CSV upload * `/results` – list/download output * Ensure clean API integration and basic status/feedback in the UI. 6. **Google Sheets Logging** * Deploy the provided Google Apps Script as a Web App. * Confirm the backend can POST metadata to this endpoint for each job. 7. **Testing & Deployment** * Run local tests: * single preview job * batch run with sample CSV * Help prepare for deployment (Vercel/Render/Lovable or similar). --- Tech Stack * Node.js (ES modules) * FFmpeg (via ffmpeg-static / fluent-ffmpeg) * Next.js / Lovable (frontend) * External APIs (TTS, media generation, optional audio generator) * Google Apps Script webhook for logging --- Budget & Timeline * Budget: * Eastern Europe: **$80–$150** * Bangladesh / India: **$50–$120** * Timeline: **2–3 days** for a focused developer --- Requirements * Strong experience with Node.js & FFmpeg * Comfortable integrating 2–3 external APIs * Able to work with CSV-driven batch pipelines * Familiar with Next.js or similar frameworks * Respectful of confidentiality and existing architecture --- To Apply Please share: 1. Examples of Node.js + FFmpeg or media automation work you’ve done. 2. Confirmation that you can complete within 2–3 days. 3. Your fixed price quote (USD).