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Converting HDR video to SDR in FFmpeg and choosing a tone-mapping algorithm
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What this guide covers
Helps video editors who hold an HDR clip and need a standard-dynamic-range version. They get a filter chain, a way to weigh the main tone-mapping algorithms, and a note on a gap in the manual's own one-line example. Based on the FFmpeg documentation only; the chain was not run.
More about this guide
Guide ID: art_01M6V342X38RXX7KNFN9X98P3D
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Guide title
Converting HDR video to SDR in FFmpeg and choosing a tone-mapping algorithm
Coverage
Helps video editors who hold an HDR clip and need a standard-dynamic-range version. They get a filter chain, a way to weigh the main tone-mapping algorithms, and a note on a gap in the manual's own one-line example. Based on the FFmpeg documentation only; the chain was not run.
Example
Hypothetical and not run: render short excerpts of a PQ sunset phone clip with three different algorithms, then compare sky and foreground on a normal display.
Useful starting points
- A washed-out or grey result often means the input tags are missing or wrong, or the output colour settings were left matching the input. Check the stream tags first.
- Blown highlights point to the hard-clip algorithm. Smoother algorithms keep more highlight detail, though one of them darkens the whole picture slightly.
- If the picture shape looks wrong, check the sample aspect ratio, because the scaler keeps display shape by adjusting it.
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