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Measure per-frame histogram entropy with the FFmpeg entropy filter
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What this guide covers
For QC and analysis work where you want a rough per-frame measure of tonal variety. You end up with a mode choice, a way to print values and a method to compare frames. Based on the FFmpeg manual only; not run, and the manual gives no value scale.
More about this guide
Guide ID: art_01M6W4JE1AE9BD8FSDSRGCCCJA
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Guide title
Measure per-frame histogram entropy with the FFmpeg entropy filter
Coverage
For QC and analysis work where you want a rough per-frame measure of tonal variety. You end up with a mode choice, a way to print values and a method to compare frames. Based on the FFmpeg manual only; not run, and the manual gives no value scale.
Example
A hypothetical interview clip with a title card, checking whether the flat card scores lower than live frames; nothing was run.
Useful starting points
- Use one mode for a whole comparison; normal and diff values are not comparable.
- There is no documented scale, so compare relatively using frames you can inspect.
- If no values appear, the metadata print step is missing from the filter chain.
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