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Capturing Video for FlickerScope

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Snoka Media edited this page Jul 3, 2026 · 5 revisions

Many modern phones — especially models from about 2020 onward — can record 240 fps slow-motion video out of the box, even if the default camera app does not make that obvious. On Android, the easiest way to get reliable clips for FlickerScope is Open Camera, a free, open-source app available on F-Droid and the Google Play Store. It gives much better control over frame rate, resolution, codec, focus, and exposure than most stock camera apps.

No computer required

FlickerScope runs entirely in your phone browser at https://snokamedia.github.io/flickerscope/. Record a clip with your camera app, then open FlickerScope in your phone browser and load the video directly from your gallery — no uploads, no computer, no install needed.

Recommended app: Open Camera

Open Camera is the best starting point for Android because it exposes the settings that matter for flicker capture instead of hiding them behind automatic modes.

Quick setup

  1. Install Open Camera from F-Droid or Google Play.
  2. Open video settings and set the frame rate to 240 fps, or enable Force 240fps if your phone supports it.
  3. Set resolution to 720p or 1080p. Lower resolution is often better for flicker work because it reduces processing and can make results cleaner.
  4. Turn image stabilization off.
  5. Set focus to infinity or use manual focus.
  6. Lock exposure so brightness does not drift during recording.
  7. Record a 8–15 second clip. The extra length lets you trim off the first and last few seconds where pressing the button caused camera shake — use FlickerScope's timeline controls to select only the clean middle segment. A tripod or phone stand helps minimize shake.
  8. Open FlickerScope in your phone browser and load the video from your gallery.

iPhone workflow

  1. Use the stock Camera app in Slo-mo mode.
  2. Record a 8–15 second clip. The extra length lets you trim off the shaky start and end where you tapped the button — FlickerScope's timeline controls can isolate just the stable portion.
  3. Open FlickerScope in Safari or Chrome.
  4. Tap to load the video from your photo library.

If you prefer to transfer the file to a desktop instead, use local file sharing and choose Keep Originals so the clip is not altered during transfer.

Phone compatibility

This usually works well on many Samsung, Google Pixel, OnePlus, and Xiaomi phones, though the exact options vary by model and camera API support. iPhones also support 240 fps slow-motion in the stock Camera app on many models.

Troubleshooting

Why does my video not look slow-motion?

That is normal. Many phones save slow-motion clips with extra playback metadata, so the file may not always look obviously slow when opened in another app. What matters is the actual capture rate. If the phone recorded at 240 fps, FlickerScope can still analyze it even if playback looks normal-speed outside the camera app. iPhone slow-motion files in particular often behave this way when shared or exported.

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