[FFmpeg-cvslog] avfilter/vf_zscale: fix mapping of zimg_chroma_location_e to AVChromaLocation

[Jan Ekström]

ffmpeg | branch: master | Jan Ekström <jeebjp at gmail.com> | Thu Oct 28 01:10:14 2021 +0300| [27c0dd55609daf440a7744e96ac20c119bbeb80f] | committer: Jan Ekström

avfilter/vf_zscale: fix mapping of zimg_chroma_location_e to AVChromaLocation

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).

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=27c0dd55609daf440a7744e96ac20c119bbeb80f
---

 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)