comment about the looks like a duplicate line.
but that is used to reason x is expressed from y
Signed-off-by: Steven Liu <l...@chinaffmpeg.org>
---
libavfilter/vf_overlay.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavfilter/vf_overlay.c b/libavfilter/vf_overlay.c
index aa5835ae3a..c6a6ac82f3 100644
--- a/libavfilter/vf_overlay.c
+++ b/libavfilter/vf_overlay.c
@@ -149,6 +149,7 @@ static void eval_expr(AVFilterContext *ctx)
s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
+ /* It is necessary if x is expressed from y */
s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
s->x = normalize_xy(s->var_values[VAR_X], s->hsub);
s->y = normalize_xy(s->var_values[VAR_Y], s->vsub);
--
2.14.3 (Apple Git-98)
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