Duolingo的人工智能视频通话让Lily栩栩如生
Lily — Duolingo’s purple-haired, perpetually unimpressed teen — doesn’t seem like the chatty type. But despite (or maybe because of) her dry wit and detached demeanor, she’s one of the language-learning app’s most beloved characters. So when Duolingo set out to create Video Call, a more immersive way to practice real conversations, Lily was the perfect candidate.
Lily — Duolingo 的紫发、永远不以为然的青少年 — 看起来并不是那种健谈的人。但尽管（或许正因为）她的干涩幽默和冷漠的举止，她是这个语言学习应用中最受欢迎的角色之一。因此，当 Duolingo 开始创建 视频通话，一种更沉浸式的练习真实对话的方式时，Lily 是完美的候选人。
The challenge was transforming a 2D animated character into an interactive AI-powered conversation partner, one that listens, reacts, and, most importantly, feels alive. To make that happen, Duolingo needed a system that could handle real-time animation, adapt to user input, and create the illusion of a natural conversation, all while keeping file sizes manageable and engineering overhead minimal.
挑战在于将一个 2D 动画角色转变为一个互动的 AI 驱动的对话伙伴，一个能够倾听、反应，最重要的是，感觉活着的角色。为了实现这一目标，Duolingo 需要一个能够处理实时动画、适应用户输入并创造自然对话幻觉的系统，同时保持文件大小可控和工程开销最小。
So, they turned to Rive.
所以，他们转向了 Rive。
Below is a message from Lily herself.
以下是Lily本人发来的消息。
Rive is a production-ready design tool for building interactive graphics that respond dynamically to user input. Unlike traditional design tools that export static assets or linear animations, Rive enables stateful animations. In other words, graphics that change based on real-time events, making them perfect for interactive applications like Duolingo’s AI-powered video calls.
Rive 是一个生产就绪的设计工具，用于构建能够动态响应用户输入的互动图形。与传统的设计工具导出静态资产或线性动画不同，Rive 使得状态动画成为可能。换句话说，图形会根据实时事件变化，使其非常适合像 Duolingo 的 AI 驱动视频通话这样的互动应用。
“When I first started at Duolingo, I had never heard of Rive. I thought I was going to be in trouble,” laughs Jasmine Vahidsafa, a senior animator at Duolingo. “But now it’s so core to our workflow, I can’t imagine doing this project without it.”
“当我第一次在 Duolingo 工作时，我从未听说过 Rive。我以为我会遇到麻烦，”Duolingo 的高级动画师 Jasmine Vahidsafa 笑着说。“但现在它已经成为我们工作流程的核心，我无法想象没有它会如何完成这个项目。”
