Understanding Light Flicker in Video (…shutter angle, slow motion video)
Understanding Light Flicker in Video (…shutter angle, slow motion video)
Avoiding flicker while shooting high-speed (slow motion) video under artificial lighting, or shooting in a foreign country can be a challenge. I knew HOW, but not WHY. Now I know why, and I want to share it with you.
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Timestamps:
0:00 — Introduction
0:36 — The premise
1:39 — What is shutter angle?
2:58 — Electricity; 50Hz, 60Hz and why it matters
4:18 — Only frame rate OR shutter speed/angle have to be right to avoid flicker
5:00 — The easy math to know safe/easy frame rates
5:57 — Shooting at a non-safe/easy frame rates
7:25 — Calculating safe shutter angles
8:27 — Using shutter speed instead of angles
10:00 — Why you can't shoot really high frame rate under AC light… sort of
12:14 — Summary
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