avfilter/vf_w3fdif: set frame_rate only when needed

1 files changed, 5 insertions, 2 deletions

diff --git a/libavfilter/vf_w3fdif.c b/libavfilter/vf_w3fdif.c
index 41a45ea06c..53631fd15b 100644
--- a/libavfilter/vf_w3fdif.c
+++ b/libavfilter/vf_w3fdif.c
@@ -325,10 +325,13 @@ static int config_input(AVFilterLink *inlink)
 
 static int config_output(AVFilterLink *outlink)
 {
-    AVFilterLink *inlink = outlink->src->inputs[0];
+    AVFilterContext *ctx = outlink->src;
+    AVFilterLink *inlink = ctx->inputs[0];
+    W3FDIFContext *s = ctx->priv;
 
     outlink->time_base = av_mul_q(inlink->time_base, (AVRational){1, 2});
-    outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2, 1});
+    if (s->mode)
+        outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2, 1});
 
     return 0;
 }