The AVChromaLocation values are one higher than zimg's, not one
lower as the undefined value is set to zero (as opposed to zimg's
-1).
---
libavfilter/vf_zscale.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavfilter/vf_zscale.c b/libavfilter/vf_zscale.c
index 439c0c8548..1288c5efc1 100644
--- a/libavfilter/vf_zscale.c
+++ b/libavfilter/vf_zscale.c
@@ -569,7 +569,7 @@ static void update_output_color_information(ZScaleContext
*s, AVFrame *frame)
frame->color_trc = (int)s->dst_format.transfer_characteristics;
if (s->chromal != -1)
- frame->chroma_location = (int)s->dst_format.chroma_location - 1;
+ frame->chroma_location = (int)s->dst_format.chroma_location + 1;
}
static int filter_frame(AVFilterLink *link, AVFrame *in)
--
2.31.1
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