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Reveal subtle changes in a clip with FFmpeg amplify
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What this guide covers
For editors and analysts checking a mostly static shot for flicker, faint motion or noise. You end up with an amplify filter string tuned by factor, threshold and tolerance, for analysis rather than delivery. Based on the FFmpeg manual; no command was run.
More about this guide
Guide ID: art_01M6WFBNWS1FQ8BREZZMD93F9G
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Guide title
Reveal subtle changes in a clip with FFmpeg amplify
Coverage
For editors and analysts checking a mostly static shot for flicker, faint motion or noise. You end up with an amplify filter string tuned by factor, threshold and tolerance, for analysis rather than delivery. Based on the FFmpeg manual; no command was run.
Example
Hypothetical case: a static tripod shot with faint flicker, where increasing the factor should make the flicker plain to see. Not run, so the effect was not observed.
Useful starting points
- Differences at or above the threshold are left alone, so large motion is not amplified.
- A noisy mess usually means the factor is too high; lower it.
- Except for the radius, the amplify options can be changed as commands while the filter runs.
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