Fixes #2557.
Signed-off-by: Paul B Mahol <[email protected]>
---
libavcodec/vc1_pred.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/vc1_pred.c b/libavcodec/vc1_pred.c
index 54712f6b7a..9f42a930fe 100644
--- a/libavcodec/vc1_pred.c
+++ b/libavcodec/vc1_pred.c
@@ -98,9 +98,9 @@ static av_always_inline int scaleforsame_y(VC1Context *v, int
i, int n /* MV */,
}
if (v->cur_field_type && !v->ref_field_type[dir])
- return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);
+ return av_clip(scaledvalue, -v->range_y / 2 - 1, v->range_y / 2);
else
- return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);
+ return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 + 1);
}
static av_always_inline int scaleforopp_x(VC1Context *v, int n /* MV */)
--
2.11.0
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