什么是文生视频？
文生视频（Text-to-Video）是利用人工智能技术，通过文本描述生成视频内容的一种创新技术。类似于图像生成，它允许用户输入简单的文本描述，AI 模型会自动将其转化为动态视频。这项技术在创作、广告、教育等领域应用广泛，为内容创作者提供了新的灵感来源。
通义万相 2.1 文生视频
阿里旗下通义万相近期推出了 2.1 版本模型升级，在视频生成和图像生成两大能力上均有显著提升。在视频生成方面，该模型通过自研的高效 VAE 和 DiT 架构增强了时空上下文建模能力，支持无限长 1080P 视频的高效编解码，并首次实现了中文文字视频生成功能，相关指标在 VBench 榜单中表现优异。
部署方式
开发者可通过 GitHub 或 HuggingFace 平台直接下载开源代码进行本地体验测试。对于没有特殊环境配置需求，或者希望快速验证效果的用户，使用云端 GPU 实例进行一键部署是更便捷的选择。
硬件性能实测
为了评估实际运行效率，我们在不同显卡配置的云环境中进行了对比测试。虽然具体耗时因网络波动有所差异，但从整体启动和生成时长来看，高端显卡优势明显。
RTX3090 测试
Prompt： Create a short video of a peaceful park scene during the golden hour. The sun is setting behind large, lush trees. The camera slowly pans through the park, capturing people walking, jogging, and sitting on benches. Birds are chirping, and there's a gentle breeze rustling through the leaves. The atmosphere is calm, serene, and warm, with soft golden light filtering through the branches.
Negative Prompt： Avoid any dark or eerie elements, such as stormy weather, gloomy skies, or ominous shadows. Do not include any loud or chaotic activities, like running or aggressive movements. The scene should remain calm and pleasant without any distractions, such as animals or people involved in unsettling behavior.
参数保持默认设置。
RTX4090 测试
Prompt： Create a lively street market scene during the daytime. The market is busy with people walking around, vendors selling fresh produce, flowers, and handmade goods. There's colorful signage, and the air is filled with the sounds of lively chatter, distant music, and the rustle of fabric. The sunlight is bright and warm, creating a vibrant atmosphere. People are smiling, interacting, and enjoying the lively energy of the market.
Negative Prompt： Do not include any empty spaces or desolate areas. Avoid gloomy or rainy weather, and keep the environment full of life and color. There should be no dark or deserted streets, and no aggressive or unsettling behavior. The scene should remain friendly and welcoming, with no negative or chaotic energy.
参数保持默认设置。
从开机时长和生成速度来看，RTX4090 比 RTX3090 至少快 5-10 分钟。如果条件允许，推荐使用 4090 进行此类高算力需求的创作任务。
总结
通义万相 2.1 的文生视频效果十分优质，适合用于自媒体创作等场景。若需快速测试部署，选择云端 GPU 服务较为方便，其中 RTX4090 在效率上具有明显优势。合理应用此类工具可以有效提升短视频内容的生产效率和质量。
