manpage: document bt.2390 parameter

Closes #9788
2025-01-04 14:12:10 +00:00 · 2022-09-28 01:53:42 +02:00 · 2022-09-28 01:53:42 +02:00 · 00813c7629
commit 00813c7629
parent 3376f775e3
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--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@ -6423,6 +6423,10 @@ them.
        Specifies the local contrast coefficient at the display peak. Defaults
        to 0.5, which means that in-gamut values will be about half as bright
        as when clipping.
+    bt.2390
+        Specifies the offset for the knee point. Defaults to 1.0, which is
+        higher than the value from the original ITU-R specification (0.5).
+        (``--vo=gpu-next`` only)
    gamma
        Specifies the exponent of the function. Defaults to 1.8.
    linear