Photosensitive-safe music videos: why it matters and how to make one
Flashing visuals can trigger seizures in people with photosensitive epilepsy. Here is the simple rule behind safe videos and how PulSound applies it for you.
Music visualizers love flashes: the screen blinks on every kick, colours jump on the drop. It looks exciting — but for some viewers it is more than uncomfortable. People with photosensitive epilepsy can have a seizure when they see rapid flashing light, and many more people get headaches or feel unwell from it.
The rule: no more than three flashes per second
The web accessibility standard WCAG (success criterion 2.3.1, “Three Flashes or Below Threshold”) says content should not flash more than three times in any one-second period. A “flash” here means a big swing in brightness — dark to bright and back — especially over a large part of the screen. Saturated red flashes are considered the most risky.
Why music videos are a special case
- Electronic music often has 120–175 beats per minute — that is 2–3 kicks every second, and many visualizers flash on each one, plus extra flashes on hi-hats and snares.
- Drops add strobe-like effects: whole-screen white flashes, fast colour inversion, shaking.
- Short-form platforms autoplay videos, so viewers do not get to choose before the flashing starts.
How PulSound’s safe mode works
Turn on Photosensitive-safe mode in the Beat effects section of the studio. While you preview and export:
- the average brightness of every frame is measured;
- when a sudden jump would become the third strong flash within one second, the change is softened by blending it with the previous frame, so it becomes a gradual fade instead of a blink;
- the beat flash effect is switched off completely.
The music still drives the motion, colours and shapes — only the harsh blinking is tamed.
Good habits for any video
- Prefer motion, scale and colour changes over full-screen white flashes.
- Avoid large areas of saturated red that flicker.
- If your video still has intense moments, add a short warning at the start and in the description.
- For broadcast TV, use a professional flash test (such as the Harding test) — no automatic tool, including ours, replaces it.
Safe mode lowers the risk; it is not a medical guarantee. But it takes one click, and it makes your music video welcome to more people.
Open the studio and try safe mode.