diff --git a/libavfilter/avf_showcwt.c b/libavfilter/avf_showcwt.c
index ed1bc4c65a..cc8740fb82 100644
--- a/libavfilter/avf_showcwt.c
+++ b/libavfilter/avf_showcwt.c
@@ -868,6 +868,7 @@ static int output_frame(AVFilterContext *ctx)
     if (s->slide != SLIDE_FRAME || s->new_frame == 1) {
         int64_t pts_offset = s->new_frame ? 0LL : av_rescale(s->ihop_index, s->hop_size, s->ihop_size);
 
+        pts_offset = av_rescale_q(pts_offset, av_make_q(1, inlink->sample_rate), inlink->time_base);
         s->outpicref->pts = av_rescale_q(s->in_pts + pts_offset, inlink->time_base, outlink->time_base);
         s->outpicref->duration = 1;
     }