[FFmpeg-cvslog] avfilter/vf_vibrance: Update default value of rlum/blum

[Zhao Zhili]

ffmpeg | branch: master | Zhao Zhili <zhilizhao at tencent.com> | Tue Jul 15 17:29:32 2025 +0800| [2a49d05d1a92cd6454b4e6fc026a66b697c77e67] | committer: Zhao Zhili

avfilter/vf_vibrance: Update default value of rlum/blum

Fix #9195

It looks like vf_vibrance.c is similar to
https://github.com/zachsaw/RenderScripts/blob/master/RenderScripts/ImageProcessingShaders/SweetFX/Vibrance.hlsl
and
https://github.com/kevinlekiller/kwin-effect-shaders_shaders/blob/main/Vibrance.frag
Originall written by Christian Cann Schuldt Jensen ~ CeeJay.dk.

They use same matrix coeff.

Signed-off-by: Zhao Zhili <zhilizhao at tencent.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2a49d05d1a92cd6454b4e6fc026a66b697c77e67
---

 libavfilter/vf_vibrance.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/vf_vibrance.c b/libavfilter/vf_vibrance.c
index 960b7e1b13..94c3d569c6 100644
--- a/libavfilter/vf_vibrance.c
+++ b/libavfilter/vf_vibrance.c
@@ -423,9 +423,9 @@ static const AVOption vibrance_options[] = {
     { "rbal", "set the red balance value",      OFFSET(balance[2]), AV_OPT_TYPE_FLOAT, {.dbl=1},      -10, 10, VF },
     { "gbal", "set the green balance value",    OFFSET(balance[0]), AV_OPT_TYPE_FLOAT, {.dbl=1},      -10, 10, VF },
     { "bbal", "set the blue balance value",     OFFSET(balance[1]), AV_OPT_TYPE_FLOAT, {.dbl=1},      -10, 10, VF },
-    { "rlum", "set the red luma coefficient",   OFFSET(lcoeffs[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.072186}, 0,  1, VF },
+    { "rlum", "set the red luma coefficient",   OFFSET(lcoeffs[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.212656}, 0,  1, VF },
     { "glum", "set the green luma coefficient", OFFSET(lcoeffs[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.715158}, 0,  1, VF },
-    { "blum", "set the blue luma coefficient",  OFFSET(lcoeffs[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.212656}, 0,  1, VF },
+    { "blum", "set the blue luma coefficient",  OFFSET(lcoeffs[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.072186}, 0,  1, VF },
     { "alternate", "use alternate colors",      OFFSET(alternate),  AV_OPT_TYPE_BOOL,  {.i64=0},        0,  1, VF },
     { NULL }
 };