AI生成的视频
大多数AI视频模型输出无声片段。将它们上传至此，即可发布带音效的视频 — 匹配动作的环境音和拟音，无需编辑。
使用AI为视频添加音频
AI视频音效生成器。上传无声视频，可选描述音效，即可获得完美同步的音频 — 脚步声、环境音、拟音 — 合并后可直接发布。
您已添加音频的视频
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真实输出
聆听AI为无声视频添加的音效
以下每个片段最初都是无声的。AI观看画面，生成匹配的音效 — 水声、呼噜声、笑声、脚步声 — 并将其合并。点击聆听。
使用场景
创作者如何用AI视频音效修复
静音或损坏的音频
风噪破坏的vlog音频、静音的屏幕录制、拍摄距离过远的片段 — 用干净、场景匹配的音效替换缺失的音轨。
广告和产品片段
带有令人满意的呼啸声的产品旋转比无声的转换效果更好。几秒钟内生成微妙、专业的音效设计，用于营销片段。
PROCESS / N·03
如何为视频添加音频
- 01
上传您的视频
MP4或MOV格式，最长60秒。时长和价格即时显示 — 无需账户即可预览。
- 02
描述音效（或省略）
留空，AI将读取场景，或引导它：“雨打在铁皮屋顶上”、“人群欢呼声”、“轻柔的钢琴环境音”。
- 03
选择音质并生成
标准音质适合快速草稿，高级音质提供最真实的同步。音频将合并到您的视频中 — 下载并发布。
FAQ / REEL NOTES
Add Audio to Video — FAQ
Q01How does AI add audio to a video?
The model watches your frames — motion, objects, environment — and generates a soundtrack that matches what's happening on screen, synced to the action. You can optionally steer it with a text description. The result comes back as a normal MP4 with the audio already merged, so there's nothing to line up in an editor.
Q02Is this different from adding music to a video?
Yes. Music overlay tools paste a song over your clip. This generates scene-aware sound effects and ambience — footsteps when someone walks, waves when there's water, room tone that matches the space. For background music you can describe it in the prompt (e.g. "soft piano ambience"), but the strength here is realistic, synced sound.
Q03What video formats and lengths are supported?
MP4 and MOV, up to 100MB. Standard quality handles videos up to 30 seconds; Premium goes up to 60 seconds. The price is per second of video — you see the exact credit cost before you generate.
Q04Is it free to add audio to a video?
New accounts get free credits to try it. After that it's pay-per-use: Standard costs 2 credits per second of video and Premium costs 8. A typical 8-second AI clip costs 16 or 64 credits, and failed generations are automatically refunded.
Q05Which quality should I choose?
Premium won our blind listening tests for realism and sync, handles up to 60 seconds, and is the recommended default. Standard is great when you're iterating quickly on short drafts and want to spend fewer credits per try.
Q06Does it work on AI-generated videos?
That's the main use case. Videos from AI generators — including everything made on this site — come out silent. Every video card here has an Add Audio button that drops the clip straight into this tool, so you can generate, add sound, and download in one flow.