From c49bd081b3b06f9c036b63af6f2ffe05db059134 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Tue, 4 Nov 2025 21:03:15 +0100
Subject: Add remove_stream_ids().

---
 src/lib/ffmpeg_content.cc | 23 +++++++++++++++++++++++
 src/lib/ffmpeg_content.h  |  5 +++++
 src/lib/ffmpeg_stream.h   |  4 ++++
 3 files changed, 32 insertions(+)

(limited to 'src/lib')

diff --git a/src/lib/ffmpeg_content.cc b/src/lib/ffmpeg_content.cc
index 7e749c656..322553586 100644
--- a/src/lib/ffmpeg_content.cc
+++ b/src/lib/ffmpeg_content.cc
@@ -724,3 +724,26 @@ FFmpegContent::take_settings_from(shared_ptr<const Content> c)
 	_filters = fc->_filters;
 }
 
+
+void
+FFmpegContent::remove_stream_ids()
+{
+	int index = 0;
+
+	if (audio) {
+		for (auto stream: audio->streams()) {
+			if (auto ffmpeg = dynamic_pointer_cast<FFmpegAudioStream>(stream)) {
+				ffmpeg->unset_id();
+				ffmpeg->set_index(index++);
+			}
+		}
+	}
+
+	for (auto stream: _subtitle_streams) {
+		if (auto ffmpeg = dynamic_pointer_cast<FFmpegSubtitleStream>(stream)) {
+			ffmpeg->unset_id();
+			ffmpeg->set_index(index++);
+		}
+	}
+}
+
diff --git a/src/lib/ffmpeg_content.h b/src/lib/ffmpeg_content.h
index c5cf1bdf5..975569ba6 100644
--- a/src/lib/ffmpeg_content.h
+++ b/src/lib/ffmpeg_content.h
@@ -113,6 +113,11 @@ public:
 
 	void signal_subtitle_stream_changed();
 
+	/** Remove all IDs from any streams we have.  This is only for working around changes
+	 *  to stream identification in 2.18.26.
+	 */
+	void remove_stream_ids();
+
 private:
 	void add_properties(std::shared_ptr<const Film> film, std::list<UserProperty> &) const override;
 
diff --git a/src/lib/ffmpeg_stream.h b/src/lib/ffmpeg_stream.h
index 1583e5221..8bdb5e1a4 100644
--- a/src/lib/ffmpeg_stream.h
+++ b/src/lib/ffmpeg_stream.h
@@ -58,6 +58,10 @@ public:
 		_id = boost::none;
 	}
 
+	void set_index(int index) {
+		_index = index;
+	}
+
 	int index(AVFormatContext const * c) const;
 
 	std::string name;
-- 
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