# LiveScreen — 100% Client-Side Video to iOS Live Photo & Lock Screen Wallpaper Studio

> LiveScreen is a zero-upload multimedia studio running 100% inside the browser via WebCodecs H.264 hardware encoding, Canvas 2D, and a pure JavaScript binary muxer. LiveScreen converts MP4, MOV, WebM, and M4V videos into genuine Apple Live Photos (paired `.JPG` + `.MOV` and single-file `.livp` bundles) with byte-accurate Apple MakerNote `0x0011` (`ContentIdentifier`) EXIF tags and QuickTime `com.apple.quicktime.content.identifier` + `mebx` (`still-image-time`) timed metadata tracks across 4 languages while uploading 0 bytes to any server.

## Key Capabilities & Technical Specifications
- **Apple MakerNote 0x0011 EXIF Injector**: Rebuilds JPEG `APP1` (`0xFFE1`) with Big-Endian `MM` TIFF and `Apple iOS\0\0\1MM` MakerNote Tag `0x0011` storing the 36-character RFC 4122 `ContentIdentifier` UUID.
- **QuickTime .MOV Live Photo Muxer**: Produces `ftyp qt  ` containers with `moov/meta` (`com.apple.quicktime.content.identifier`) and an associated `tref/cdsc` `mebx` (`mdta/com.apple.quicktime.still-image-time`) timed metadata track.
- **WebCodecs H.264 (AVC Level 5.1) 60fps Encoder**: Supports iPhone 16 Pro Max (`1320×2868`), iPhone 16 Pro (`1206×2622`), and `1080×1920` at up to 60 fps with automatic QuickTime Photo-JPEG fallback.
- **Landscape-to-Portrait Blur-Fill & Lock Screen Simulator**: Interactive iPhone 16 Pro Lock Screen stage with Dynamic Island, 0%–60% top clock readability vignette, and one-tap iOS Safari `navigator.share` direct Photos import.
- **Lossless ISO-BMFF Live Photo Inspector & Re-Linker**: Audits and losslessly re-binds unpaired `.JPG` + `.MOV` or `.livp` files without re-encoding video frames.

## Canonical Entry Points
- [Live Wallpaper Studio (Auto-detected Locale)](https://livescreen.llmland.io/): Main interactive Video-to-iOS-Live-Photo workbench & Lock Screen simulator.
- [Binary Muxing Specification](https://livescreen.llmland.io/principles/): MakerNote `0x0011` and QuickTime `mebx` atom specifications.
- [Frequently Asked Questions (FAQ)](https://livescreen.llmland.io/faq/): iOS 17–26 Lock Screen motion rules, Safari direct save, and 0-byte upload privacy.
- [Simplified Chinese (简体中文)](https://livescreen.llmland.io/zh-Hans/) · [中文实况封装原理](https://livescreen.llmland.io/zh-Hans/principles/) · [中文常见问题 (FAQ)](https://livescreen.llmland.io/zh-Hans/faq/)
- [Traditional Chinese (繁體中文)](https://livescreen.llmland.io/zh-Hant/) · [繁體原況封裝原理](https://livescreen.llmland.io/zh-Hant/principles/) · [繁體常見問題 (FAQ)](https://livescreen.llmland.io/zh-Hant/faq/)
- [English](https://livescreen.llmland.io/en/) · [English Binary Spec](https://livescreen.llmland.io/en/principles/) · [English FAQ](https://livescreen.llmland.io/en/faq/)
- [Japanese (日本語)](https://livescreen.llmland.io/ja/) · [日本語バイナリ仕様](https://livescreen.llmland.io/ja/principles/) · [日本語 FAQ](https://livescreen.llmland.io/ja/faq/)

## Machine-Readable Resources
- [Full Technical Specification & FAQ (llms-full.txt)](https://livescreen.llmland.io/llms-full.txt): Complete binary offsets, codec parameters, and multilingual FAQ.
- [XML Sitemap](https://livescreen.llmland.io/sitemap.xml): Canonical URLs with reciprocal `xhtml:link` `hreflang` annotations.

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