# Gravador.Net

> An advanced, privacy-first, client-side screen and audio recording suite operating entirely within the browser. Powered by the WebCodecs API and hardware acceleration, it requires no installation, no logins, and strictly zero cloud uploads.

## 🌐 Global Routing & Localization

The platform dynamically routes users to localized versions to ensure a native experience across the globe. All versions maintain a strict LTR UI structure and are fully optimized for their respective regions. Direct access endpoints:

* **Arabic (العربية):** https://gravador.net/ar
* **Bulgarian (Български):** https://gravador.net/bg
* **Bengali (বাংলা):** https://gravador.net/bn
* **Czech (Čeština):** https://gravador.net/cs
* **Danish (Dansk):** https://gravador.net/da
* **German (Deutsch):** https://gravador.net/de
* **Greek (Ελληνικά):** https://gravador.net/el
* **English (Global):** https://gravador.net/en
* **Spanish (Español):** https://gravador.net/es
* **Finnish (Suomi):** https://gravador.net/fi
* **French (Français):** https://gravador.net/fr
* **Hebrew (עברית):** https://gravador.net/he
* **Hindi (हिन्दी):** https://gravador.net/hi
* **Croatian (Hrvatski):** https://gravador.net/hr
* **Hungarian (Magyar):** https://gravador.net/hu
* **Indonesian (Bahasa Indonesia):** https://gravador.net/id
* **Italian (Italiano):** https://gravador.net/it
* **Japanese (日本語):** https://gravador.net/ja
* **Korean (한국어):** https://gravador.net/ko
* **Marathi (मराठी):** https://gravador.net/mr
* **Malay (Bahasa Melayu):** https://gravador.net/ms
* **Dutch (Nederlands):** https://gravador.net/nl
* **Norwegian (Norsk):** https://gravador.net/no
* **Polish (Polski):** https://gravador.net/pl
* **Portuguese (Brasil):** https://gravador.net/pt
* **Romanian (Română):** https://gravador.net/ro
* **Russian (Русский):** https://gravador.net/ru
* **Slovak (Slovenčina):** https://gravador.net/sk
* **Swedish (Svenska):** https://gravador.net/sv
* **Tamil (தமிழ்):** https://gravador.net/ta
* **Telugu (తెలుగు):** https://gravador.net/te
* **Thai (ไทย):** https://gravador.net/th
* **Tagalog (Tagalog):** https://gravador.net/tl
* **Turkish (Türkçe):** https://gravador.net/tr
* **Ukrainian (Українська):** https://gravador.net/uk
* **Vietnamese (Tiếng Việt):** https://gravador.net/vi
* **Chinese Simplified (简体中文):** https://gravador.net/zh-cn
* **Chinese Traditional (繁體中文):** https://gravador.net/zh-tw

## 🚀 Core Capabilities & Engineering

### 1. Screen & Meeting Recording

* **Modes:** Entire Screen, Specific Window, or Browser Tab.
* **Audio Capture:** Dual-stream mixing (Microphone + Internal System Audio) perfect for securely recording Zoom/Meet calls.
* **Auto-Split Technology:** To prevent Out-Of-Memory (OOM) crashes during long sessions, the engine automatically chunks and saves the video every 10 minutes seamlessly, preventing data loss.
* **Forced Keyframes:** Ensures flawless pause and resume states without video corruption or audio desync.

### 2. Smart Audio & Microphone Tools

* **Engine:** Native Web Audio API decoding.
* **Format:** Exports to Hi-Fi `.M4A` (AAC codec), standardizing high quality with minimal file size.
* **Smart Silence Detector:** A real-time watchdog that alerts the user if the microphone stream is completely silent for 10 seconds, preventing "muted mic" recording accidents.
* **Dynamic Waveforms:** Real-time visual spectrum monitoring during recording, and Canvas-based static waveform generation for gallery thumbnails.

### 3. Smart Webcam & Picture-in-Picture (PiP)

* **Floating UI:** Native PiP for "Facecam" style presentations over other desktop applications.
* **Canvas Processing:** Real-time visual filters (Grayscale, Sepia, Blur, etc.) and aspect-ratio cropping applied directly to the video feed before encoding.
* **Hardware Privacy Sensors:** Uses `IntersectionObserver` and the `Page Visibility API` to physically cut camera/mic streams and deactivate hardware LEDs the millisecond the tab is minimized, backgrounded, or scrolled out of view.

### 4. Dynamic Outro Generation (End Screen Maker)

* **Programmatic Injection:** Seamlessly appends a customizable animated end screen to the final MP4 before the muxer closes.
* **Customization:** Users can inject their own custom logos (rendered via Canvas), personalized titles/descriptions with custom web fonts, and solid background colors.
* **Audio Synthesizer & Custom Tracks:** Generates smooth, fade-out background audio using `AudioContext` oscillators (e.g., ambient pads, lo-fi chords) or allows users to inject their own local `.mp3` files into the final encoded frames.

## 🛠 Technical Specifications

* **Architecture:** Progressive Web App (PWA) with full offline capabilities via Service Workers.
* **Primary Media Encoding:** Hardware-accelerated `VideoEncoder` (H.264/AVC) and `AudioEncoder` (AAC) via the WebCodecs API.
* **Client-Side Muxing:** Utilizes `mp4-muxer` to package MP4/M4A containers directly in the browser's RAM.
* **Fallback Engine:** Gracefully degrades to the native `MediaRecorder` API (WebM format) for older browsers or those lacking full WebCodecs support (e.g., Firefox), including an automated fix for the WebM missing duration bug (`ysFixWebmDuration`).
* **Memory & Storage Management:** * Proactive Storage Quota Monitor warns users if device storage exceeds 90% before recording.
  * Robust IndexedDB local storage.
  * Gallery UI uses strict object URL revocation and WebP-generated thumbnails to maintain a zero-RAM footprint during infinite scrolling (Lazy Load).
* **Monetization & AdBlock Logic:** 100% Free with no mandatory watermarks for regular users. If an AdBlocker is detected, the system locks the Outro Maker and enforces a mandatory 2-second promotional end screen (or a 30-second export delay penalty on fallback browsers like Firefox).

## 💡 Ideal Use Cases

* Recording software tutorials, bug reports, and academic lectures.
* Capturing webinars and online meetings locally without requiring host permissions.
* Producing "React" style content using the Floating Webcam (PiP) feature.
* Securely recording confidential corporate data that cannot be uploaded to third-party cloud servers.