lavfi/vf_transpose: fix regression with semiplanar formats

[ffmpeg] / libavfilter / af_pan.c

diff --git a/libavfilter/af_pan.c b/libavfilter/af_pan.c
index 23b29419b635027889bff8340547028449664660..d8a63a79522544ab0693dabe5ad1ab26394c8ff3 100644 (file)
--- a/libavfilter/af_pan.c
+++ b/libavfilter/af_pan.c
@@ -166,6 +166,7 @@ static av_cold int init(AVFilterContext *ctx)
             goto fail;
         }
         /* gains */
+        sign = 1;
         while (1) {
             gain = 1;
             if (sscanf(arg, "%lf%n *%n", &gain, &len, &len))