Show HN: VHS 摄像机 – 用模拟的 VHS 信号处理你的相机或视频

Show HN: VHS 摄像机 – 用模拟的 VHS 信号处理你的相机或视频
Show HN: VHS Camera – Run your camera or videos through a simulated VHS signal

VHS Camera 是一款免费的、基于浏览器的 VHS 滤镜，适用于照片和视频——无需安装或注册。你可以用摄像头实时录制，选择磁带磨损程度（干净、脏污或磨损）、日期戳和声音；或者上传现有的 MP4、MOV 或 WebM 文件来预览并保存效果。所有处理都在你的设备上进行，因此不会上传任何内容；视频保存为 MP4/WebM，照片保存为 JPG。磁带声音会添加嘶嘶声、抖动和高频衰减，可切换开关。它在当前的移动浏览器中可用，提供调节画质和帧率的设置。逼真的效果基于 ntsc-rs，模拟模拟信号编码、色彩溢出、跟踪噪声和柔和细节。由 Foto Jocković 创建。

Hacker News 上的一个帖子讨论了“Show HN：VHS Camera”，这是一个让摄像头/视频通过模拟 VHS 信号运行的工具。评论者争论它是否像真正的 VHS，指出 VHS 画质因设备、磁带和格式而差异很大。评论者 valadaptive 说，该应用似乎使用了 ntsc-rs-web 的代码，而 ntsc-rs-web 并非宽松许可，除了宽松许可的 ntsc-rs 库之外。创作者 wookashin 承认他们错误地使用了那段代码，可能是通过 Claude，并表示正在重做那部分。其他评论询问它是否只是对 ntsc.rs 的封装，请求使用摄像头，并称赞怀旧效果。技术讨论涉及模拟视频的复杂性、PAL-N，以及为什么真实的 VHS 外观难以定义。

原文

VHS Camera is a free VHS filter for your camera: shoot video and photos that look as if they came off an old camcorder tape, with colour bleed, tape noise and a date stamp. It runs in the browser, so there is no app to install.

How to film with the VHS filter

Tap INSERT TAPE and allow the camera, or tap UPLOAD A VIDEO to use a video you already have.
Choose how worn the tape looks (Clean, Dirty or Worn) and set the date stamp and sound.
Switch between LIVE and PHOTO, then press the record button.
Save the clip or photo, or share it straight from the preview.

VHS filter for your videos

Already have a clip? Tap UPLOAD A VIDEO on the start screen, or UPLOAD VIDEO in the camera, and pick a video from your phone or computer. It plays with the VHS effect right away, so you can try the tapes, the quality, the date stamp and the sound while you watch. Then save the whole video as an MP4 with its original sound. You don’t need a camera for this, and the video is processed on your device, never uploaded to a server. The sound gets the VHS treatment too: Tape sound, under the Sound button, adds a soft tape hiss, a slight wobble and muffled highs to uploaded videos and LIVE recordings, and one tap turns it off.

Private: nothing is uploaded

The VHS effect is calculated on your phone or computer, frame by frame. Your video and photos are never uploaded to a server.

Frequently asked questions

Is the VHS filter free?

Yes. There is no sign-up and nothing to install; it works in the browser.

Does it work on iPhone and Android?

Yes, in a current mobile browser such as Safari or Chrome with camera access. On slower phones, the settings let you trade some detail for a smoother frame rate.

Can I add the VHS effect to a video I already have?

Yes. Tap UPLOAD A VIDEO, pick an MP4, MOV or WebM file and play it with the effect. Save video then turns the whole clip into an MP4 with the VHS look and the original sound, right in your browser.

What file do I get?

Videos are saved as MP4 where the browser supports it (otherwise WebM), photos as JPG.

Why does it look like a real tape?

The effect is based on ntsc-rs, which simulates how analogue video is encoded and recorded: colour bleed, tracking noise and soft detail, not a picture laid on top.

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