For cehoyos:
To apply use:
-vf 'lutyuv=gammaval(1.0/GAMMA)'
---
libavformat/cinedec.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/libavformat/cinedec.c b/libavformat/cinedec.c
index 632f46c..5989039 100644
--- a/libavformat/cinedec.c
+++ b/libavformat/cinedec.c
@@ -89,6 +89,12 @@ static int set_metadata_float(AVDictionary **dict, const
char *key, float value,
return 0;
}
+static const float xlat_gamma(int gamma)
+{
+ return gamma == 34 ? 1.f / 0.45f
+ : powf(10.f, gamma / 100.f);
+}
+
static int cine_read_header(AVFormatContext *avctx)
{
AVIOContext *pb = avctx->pb;
@@ -186,7 +192,7 @@ static int cine_read_header(AVFormatContext *avctx)
set_metadata_int(&st->metadata, "brightness", avio_rl32(pb), 1);
set_metadata_int(&st->metadata, "contrast", avio_rl32(pb), 1);
- set_metadata_int(&st->metadata, "gamma", avio_rl32(pb), 1);
+ set_metadata_float(&st->metadata, "gamma", xlat_gamma(avio_rl32(pb)), 0);
avio_skip(pb, 12 + 16); // Reserved1 .. AutoExpRect
set_metadata_float(&st->metadata, "wbgain[0].r",
av_int2float(avio_rl32(pb)), 1);
--
2.1.0
-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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