From ceb52d47a36f581c32bff7c91f7d1f80b0ae9050 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Tue, 17 Jan 2023 18:55:52 +0100
Subject: [PATCH] avfilter/avf_showvolume: set output video frame duration

---
 libavfilter/avf_showvolume.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavfilter/avf_showvolume.c b/libavfilter/avf_showvolume.c
index 952f079a67..24d42d030d 100644
--- a/libavfilter/avf_showvolume.c
+++ b/libavfilter/avf_showvolume.c
@@ -339,6 +339,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
         clear_picture(s, outlink);
     }
     s->out->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
+    s->out->duration = 1;
 
     if ((s->f < 1.) && (s->f > 0.)) {
         for (j = 0; j < outlink->h; j++) {