From 52b3eee4e7285e26469b2a5f4d9d9eac20aba387 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Fri, 12 Dec 2025 11:43:45 +0100
Subject: Fix error when seeking a file with no video and >1 audio stream
 (#3128).

---
 test/ffmpeg_decoder_seek_test.cc | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'test/ffmpeg_decoder_seek_test.cc')

diff --git a/test/ffmpeg_decoder_seek_test.cc b/test/ffmpeg_decoder_seek_test.cc
index ee0da99da..a3212318c 100644
--- a/test/ffmpeg_decoder_seek_test.cc
+++ b/test/ffmpeg_decoder_seek_test.cc
@@ -28,6 +28,8 @@
  */
 
 
+#include "lib/audio_decoder.h"
+#include "lib/content_audio.h"
 #include "lib/content_video.h"
 #include "lib/ffmpeg_content.h"
 #include "lib/ffmpeg_decoder.h"
@@ -152,3 +154,23 @@ BOOST_AUTO_TEST_CASE(seek_when_backward_fails)
 	}
 }
 
+
+BOOST_AUTO_TEST_CASE(seek_with_no_video_two_audio)
+{
+	auto content = make_shared<FFmpegContent>("test/data/no_video_two_audio.mov");
+	auto film = new_test_film("seek_with_no_video_two_audio", { content });
+	auto decoder = make_shared<FFmpegDecoder>(film, content, false);
+
+	optional<Frame> frame;
+	auto audio = [&](AudioStreamPtr, ContentAudio audio) {
+		frame = audio.frame;
+	};
+
+	decoder->audio->Data.connect(boost::bind<void>(audio, _1, _2));
+	decoder->seek(dcpomatic::ContentTime::from_seconds(1), false);
+	while (!decoder->pass() && frame == boost::none) {}
+
+	BOOST_REQUIRE(frame != boost::none);
+	BOOST_CHECK(*frame > 0);
+}
+
-- 
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