HTML to video vs. screen recording
Same animation, two ways to capture it. Screen recording copies whatever your monitor painted in real time — stutters and all. Framecast renders each frame on its own. Here's the same clip, both ways:
Why screen recording drops frames
A screen recorder is a passenger: it grabs whatever the display shows, at whatever moment it can, in real time. Three things go wrong with animation:
- Refresh-rate mismatch. A 60fps animation on a 60Hz display leaves no headroom. Any hiccup means a missed frame, and the recorder saves the gap.
- CPU contention. The recorder, the browser, and the animation all fight for the same cores. The animation loses, and you see stutter.
- Compression on the fly. Real-time encoders cut corners under load — that's where gradient banding and crushed transparency come from.
How a frame-by-frame render fixes it
Framecast isn't a passenger — it drives the clock. It loads your HTML in a real browser engine and advances a deterministic virtual clock one frame at a time, capturing each frame at full quality before moving on. Time is decoupled from your hardware, so the render is identical whether your laptop is idle or busy. A true 60fps animation comes out as a true 60fps video.
| Screen recording | Framecast render | |
|---|---|---|
| Dropped frames | Common | None |
| Gradient banding | Likely | Clean |
| Timing accuracy | Real-time, varies | Frame-exact |
| Max resolution | Your screen | Up to 4K |
| Watermark | None (but quality suffers) | None |
| Multiple aspect ratios | Re-record each | 16:9, 9:16 & 1:1 in one drop |
| Setup | Recorder + cropping + re-encode | Drop one HTML file |
When screen recording is fine
If you just need a throwaway clip for a Slack message, screen recording is quicker and free. Framecast earns its $2.99 when the clip is going somewhere that matters — a launch, a portfolio, a paid post, a thumbnail-worthy Short — where "looks rendered" beats "looks recorded."