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Read exposure with the FFmpeg histogram filter and ffplay
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What this guide covers
For editors who want a live exposure check on a clip, before and after a correction, without opening an editing suite. You end with a histogram window using the stack, parade or overlay layout. It is based on the FFmpeg manual and was not run; reading histograms is general knowledge.
More about this guide
Guide ID: art_01M6VKVKR7HBPJTZ5TZS1DZD1P
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Guide title
Read exposure with the FFmpeg histogram filter and ffplay
Coverage
For editors who want a live exposure check on a clip, before and after a correction, without opening an editing suite. You end with a histogram window using the stack, parade or overlay layout. It is based on the FFmpeg manual and was not run; reading histograms is general knowledge.
Example
A hypothetical underexposed clip is viewed in parade layout with a taller graph; the guide says the graphs should shift right after a brightness correction, and nothing was run.
Useful starting points
- If the graphs look flat because one bin dominates, switch the scale from linear to logarithmic.
- The graph height only accepts a limited range; an error about it means the value is outside the documented limits.
- ffplay is a separate program; if it is not found, use a full FFmpeg build that includes it.
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