From 3cefde7eb5c47fc9a213a2c52aeeb88989c8241e Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 16 Aug 2022 16:26:11 +0200
Subject: lavfi/avf_showfreqs: set frame durations

The filter is supposed to produce CFR output.
---
 libavfilter/avf_showfreqs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavfilter/avf_showfreqs.c b/libavfilter/avf_showfreqs.c
index 86a67c7328..cc7d6204b4 100644
--- a/libavfilter/avf_showfreqs.c
+++ b/libavfilter/avf_showfreqs.c
@@ -469,6 +469,7 @@ static int plot_freqs(AVFilterLink *inlink, int64_t pts)
 
     av_free(colors);
     out->pts = s->pts;
+    out->duration = 1;
     out->sample_aspect_ratio = (AVRational){1,1};
     return ff_filter_frame(outlink, out);
 }
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