什么是 AI 视频生成？
AI 视频生成使用深度学习模型从文本提示、图片或现有素材创建视频片段。2026 年主流模型包括 Seedance 2.0、Sora 2、Kling 3.0 和 Runway Gen-4，可生成 4 秒至 2 分钟以上的 4K 视频。
AI 视频生成的工作原理
AI 视频创作的核心概念。
扩散模型
大多数 AI 视频生成器使用扩散模型，从视觉噪声开始，在文本或图像输入的引导下逐步去噪生成连贯的视频帧。
文生视频 (T2V)
输入场景描述，AI 生成匹配的视频片段。Sora 2 可从单个提示生成最长 20 秒的视频。
图生视频 (I2V)
上传静态图像，AI 将其动画化为视频。Seedance 2.0 导演模式支持最多 12 张参考图片，实现一致的多镜头输出。
视频转视频 (V2V)
输入现有素材，AI 重新风格化、升级或变换视频，同时保留运动特征。Runway Gen-4 在风格迁移控制方面领先。
时间一致性
AI 视频的最大挑战：保持主体、光照和物理效果在帧间的一致性。面部锁定和运动预测技术解决了这一问题。
定价模式
大多数工具提供免费层（每月 5-30 次生成），付费计划从 $8-$30/月起。开源选项如 Wan 2.6 可免费自托管。
AI 视频生成常见问题
关于 AI 视频生成技术的常见问题。
了解更多 AI 视频内容
帮助你选择合适工具的指南和对比。
探索 AI 视频工具
体验本指南中讨论的工具。
AI Video Generator
Free AI video generator — create videos from text, images, or clips with Seedance 2.0, Sora 2, Kling 3.0, Runway Gen-4 & more. Compare models side by side.
AI Image Generator
Free AI image generator — create images from text prompts with Midjourney v7, Flux 2, DALL-E 3, Stable Diffusion & more. Compare quality side by side.
AI Music Generator
Free AI music generator — create songs with vocals, instrumentals & soundtracks using Suno v5, Udio 2 & more. Text-to-music with lyrics support.
AI Video Prompt Generator
AI video prompt generator — build optimized SCELA prompts for Seedance 2.0, Sora 2, Kling 3.0 & Runway Gen-4. Free tool with templates for YouTube, TikTok & Shorts.
Seedance 2.0 AI Video Generator
Seedance 2.0 by ByteDance — Director Mode with 12-file input, 4K output, face-lock consistency & lip-sync. Free 5 videos/day on Dreamina.
Kling 3.0 AI Video Generator
Kling 3.0 by Kuaishou — multi-shot 4K AI video with up to 6 camera cuts, lip-sync dialogue & synchronized audio. Free 6 clips/day, Pro from $8/mo.
Sora 2 AI Video Generator
Sora 2 by OpenAI — cinematic 1080p AI video from text with Storyboard editor, physics simulation & seamless scene transitions. Plans from $20/mo.
Runway Gen-4 AI Video Generator
Runway Gen-4 & Gen-4.5 — #1 on Video Arena with cinematic 4K output, motion brush, camera controls, inpainting & Adobe Firefly integration. From ~$15/mo.
Veo 3 AI Video Generator
Veo 3 by Google DeepMind — native audio generation alongside video, vertical 9:16 for TikTok/Shorts, scene extension & Gemini API access. Free to try.
Hailuo AI Video Generator
Hailuo AI by MiniMax — ultra-fast video generation with complex character expressions, anime/ink wash/game CG art styles & generous free tier. 30-second generation.
Wan 2.6 AI Video Generator
Wan 2.6 by Alibaba — open-source AI video model you can self-host. Text-to-video, image-to-video, ComfyUI integration & community extensions. Free online.
Luma AI Dream Machine Video Generator
Luma AI Dream Machine — ultra-fast AI video generation with camera motion controls, keyframe animation & image-to-video. Free 30 generations/month, API from $0.0032/frame.
Pika AI Video Generator & Editor
Pika AI — generate and edit AI videos with Pikaffects visual FX, lip sync, scene expansion & AI sound effects. Free 250 credits/month, Standard from $8/mo.
Midjourney 7 AI Image Generator
Midjourney v7 — premium photorealistic AI images with personalized style, ultra-high resolution, variation & remix tools, and multi-image blending. Plans from ~$10/mo.
Flux 2 AI Image Generator
Flux 2 by Black Forest Labs — open-weight AI image model with fast inference, accurate text rendering & commercial-friendly licensing. Self-host or use online.
Suno 5 AI Music Generator
Suno v5 — generate full songs with vocals, lyrics & multi-instrument arrangements from text prompts. Free tier available, premium plans for commercial use.
Udio 2 AI Music Generator
Udio 2 — studio-quality AI music generation with vocal cloning, stem separation, remix tools & genre-specific fine-tuning. Audiophile-grade output quality.
Text to Video AI Generator
Text to video AI — turn text prompts into cinematic video clips. Compare Seedance, Sora, Kling, Runway & 10+ models side by side. Free to start.
Image to Video AI Generator
Image to video AI — animate photos and illustrations into 4-20s video clips with motion control, camera paths & character consistency across frames.
Video to Video AI Generator
Video to video AI — restyle, upscale & transform existing clips with AI style transfer. Convert footage to anime, cinematic, or artistic looks while preserving motion.
Text to Image AI Generator
Text to image AI — generate photorealistic or artistic images from text descriptions. Compare Midjourney v7, DALL-E 3, Flux 2 & Stable Diffusion side by side.
Image to Image AI Generator
Image to image AI — transform, upscale & restyle photos with AI-powered style transfer, inpainting, outpainting & 4x resolution enhancement. Free online tool.
Text to Music AI Generator
Text to music AI — generate royalty-free tracks, jingles & background music from text prompts. Create custom soundtracks for YouTube, podcasts & social media.
AI Voice Generator
AI voice generator — create realistic voiceovers, narration & text-to-speech in 50+ languages. Voice cloning, emotion control & video narration export.