From af286f17a1c79b6d543c586cf020d08d4e84f0eb Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Fri, 14 Apr 2023 11:24:39 +0200
Subject: [PATCH] fftools/ffmpeg_enc: set audio frame duration when encoding

---
 fftools/ffmpeg_enc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fftools/ffmpeg_enc.c b/fftools/ffmpeg_enc.c
index 45bf4b127f..a35c9f60e5 100644
--- a/fftools/ffmpeg_enc.c
+++ b/fftools/ffmpeg_enc.c
@@ -811,6 +811,8 @@ static void do_audio_out(OutputFile *of, OutputStream *ost,
             av_rescale_q(start_time, AV_TIME_BASE_Q,   enc->time_base);
     }
     frame->time_base = enc->time_base;
+    frame->duration  = av_rescale_q(frame->nb_samples, (AVRational){1, frame->sample_rate},
+                                    enc->time_base);
 
     if (!check_recording_time(ost, frame->pts, frame->time_base))
         return;