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nand b32f2ef0d3 vo_opengl: use more precise gamma for BT.709 with color management
Change from gamma 2.2 to the slightly more precise 1/0.45 as per BT.709.

https://www.itu.int/rec/R-REC-BT.709-5-200204-I/en mentions a value of
γ=0.45 for the conceptual non-linear precorrection of video signals.

This is approximately the inverse of 2.22, and not 2.20 as the code had
been using until now.
2012-12-28 13:43:24 +01:00
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en vo_opengl: use more precise gamma for BT.709 with color management 2012-12-28 13:43:24 +01:00