How do you fix flicker in AI-generated video?

Flicker happens when frames are not temporally consistent. Fix it by shortening the clip, lowering motion intensity in the prompt, switching to a model with stronger temporal coherence (Veo 3, Kling 2), generating image-to-video instead of text-to-video, or post-processing with a deflicker tool like Topaz Video AI.

First fix: cut the clip in half.
Second fix: drop motion/camera-move language from the prompt.
Veo 3 and Kling 2 are the most temporally consistent in 2026.
Topaz Video AI cleans up residual flicker post-render.

What causes flicker in AI video

Flicker is the visual symptom of weak temporal consistency: each generated frame is slightly different from the last in ways that should be impossible (wall texture changes, eye colour shifts, lighting jitters). The model is essentially hallucinating a new world every few frames.

Bigger, slower models suffer less because they hold longer attention windows. Faster, cheaper models flicker more.

The fixes in order of effort

First, shorten the clip. Flicker usually shows up after 4–5 seconds. Second, simplify the prompt — remove 'fast camera move', 'lots of motion', 'dynamic lighting'. Third, switch to image-to-video with a real reference frame; the model has an anchor and flickers less. Fourth, switch model — Veo 3 and Kling 2 are the most stable in 2026.

If none of that is enough, run the output through Topaz Video AI's 'Stabilize' / 'Iris' models post-render.

FAQ

Does upscaling reduce flicker?

No — upscaling makes flicker more visible because details get sharper. Fix flicker before upscaling.

Why does Hailuo flicker more than Veo?

Hailuo trades temporal stability for speed. It is great for fast UGC; not the best pick for slow cinematic shots.