From 45910b2504e2e2931357ba4b03272d15c4755d1f Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Tue, 17 Jan 2023 15:40:39 +0100
Subject: [PATCH] avfilter/vsrc_mandelbrot: set video frame duration

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

diff --git a/libavfilter/vsrc_mandelbrot.c b/libavfilter/vsrc_mandelbrot.c
index d4d7e2fa49..aa63f9edd1 100644
--- a/libavfilter/vsrc_mandelbrot.c
+++ b/libavfilter/vsrc_mandelbrot.c
@@ -395,6 +395,7 @@ static int request_frame(AVFilterLink *link)
 
     picref->sample_aspect_ratio = (AVRational) {1, 1};
     picref->pts = s->pts++;
+    picref->duration = 1;
 
     draw_mandelbrot(link->src, (uint32_t*)picref->data[0], picref->linesize[0]/4, picref->pts);
     return ff_filter_frame(link, picref);