manpage: vo_opengl: document that srgb subopt changes gamma

2012-11-11 17:56:42 +01:00
1 parent ed8fad729d
commit 34649dbd1d
@@ -330,7 +330,8 @@ opengl
        NOTE: for YUV colorspaces, gamma 2.2 is assumed. RGB input is always
        assumed to be in sRGB.
        This option is not really useful, as gamma-correct scaling has not much
-        influence on typical video playback.
+        influence on typical video playback. Most visible effect comes from
+        slightly different gamma.

    pbo
        Enable use of PBOs. This is faster, but can sometimes lead to