Time-lapse flicker can come from exposure or rendering changes between frames. Identify the changing variable before applying a correction, because the cure for an aperture problem is different from the cure for a processing problem.
What to do
Use a stable setup and record the settings. For constant light, test fixed exposure and white balance. For changing light, plan an appropriate exposure transition rather than letting every frame vary unpredictably.
Manual exposure, manual focus and a fixed white balance remove most automatic changes. Turn off any automatic brightness or contrast functions that process each frame differently.
Common causes of flicker
Check these likely culprits one at a time:
- Automatic exposure: the camera re-meters each frame as clouds pass, producing brightness jumps.
- Aperture inconsistency: some lenses do not close to exactly the same aperture each time, especially at fast intervals and with automatic apertures.
- Artificial lights: flickering bulbs or screens can vary between frames when the shutter is fast.
- Automatic white balance: color shifts between frames look like flicker.
- Uneven processing: applying different editing to each frame creates variation.
A slower shutter speed can average out some light flicker, and a lens set to a mid aperture rather than the widest often behaves more consistently.
A mistake to avoid
A deflicker tool cannot repair missing frames or large framing jumps. Separate brightness variation from movement problems during review. If the camera moved, fix the support, not the exposure.
A detail worth checking
Do a first edit with identical processing settings across the sequence. Automatic corrections applied differently to neighboring frames can introduce variation even when the original camera exposure was consistent.
Try this practical check
Capture a short sequence in steady light and inspect adjacent frames. If brightness changes, compare exposure metadata and processing settings before attempting a longer session. Playing the clip quickly makes small flicker easier to see.
Common questions
Can flicker be fixed afterward?
Often reduced with deflicker tools, but prevention is better. Consistent settings give cleaner results.
Should I use aperture priority for a time-lapse?
It can handle gradual light changes but may cause jumps. Many people prefer manual for constant light and carefully planned changes otherwise.
Why does the sky flicker but the ground does not?
Passing clouds or auto white balance may be affecting the sky. Check the metadata and processing for those frames.
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