From 04bbf5f70d281f11d1ee94c8ee3a91912d3a6c6a Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Tue, 17 Jan 2023 18:48:09 +0100
Subject: [PATCH] avfilter/vsrc_gradients: set output video frame duration

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

diff --git a/libavfilter/vsrc_gradients.c b/libavfilter/vsrc_gradients.c
index c005613d42..3c524b9242 100644
--- a/libavfilter/vsrc_gradients.c
+++ b/libavfilter/vsrc_gradients.c
@@ -402,6 +402,7 @@ static int activate(AVFilterContext *ctx)
         frame->pict_type           = AV_PICTURE_TYPE_I;
         frame->sample_aspect_ratio = (AVRational) {1, 1};
         frame->pts = s->pts++;
+        frame->duration = 1;
 
         ff_filter_execute(ctx, s->draw_slice, frame, NULL,
                           FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));