From 81220a213b932ef7befab3453c1e035b5e6c133d Mon Sep 17 00:00:00 2001
From: Brian Matherly <brian.matherly@yahoo.com>
Date: Sat, 27 Jul 2024 11:02:59 -0500
Subject: [PATCH] Encode subtitles in output files

The user must first add subtitles to the timeline using the
subtitle panel
---
 src/docks/encodedock.cpp | 19 +++++++++++++++++++
 src/docks/encodedock.h   |  1 +
 2 files changed, 20 insertions(+)

diff --git a/src/docks/encodedock.cpp b/src/docks/encodedock.cpp
index 50c49998d9..73b4a0a266 100755
--- a/src/docks/encodedock.cpp
+++ b/src/docks/encodedock.cpp
@@ -1015,6 +1015,24 @@ void EncodeDock::collectProperties(QDomElement &node, int realtime)
     delete p;
 }
 
+void EncodeDock::setSubtitleProperties(QDomElement &node, Mlt::Producer *service)
+{
+    if (!service) {
+        return;
+    }
+    int subIndex = 0;
+    for (int i = 0; i < service->filter_count(); i++) {
+        QScopedPointer<Mlt::Filter> filter(service->filter(i));
+        if (filter  && filter->is_valid() && filter->get("mlt_service") == QString("subtitle_feed")) {
+            QString key = QString("subtitle.%1.feed").arg(subIndex);
+            node.setAttribute(key, filter->get("feed"));
+            key = QString("subtitle.%1.lang").arg(subIndex);
+            node.setAttribute(key, filter->get("lang"));
+            subIndex++;
+        }
+    }
+}
+
 MeltJob *EncodeDock::createMeltJob(Mlt::Producer *service, const QString &target, int realtime,
                                    int pass, const QThread::Priority priority)
 {
@@ -1124,6 +1142,7 @@ MeltJob *EncodeDock::createMeltJob(Mlt::Producer *service, const QString &target
             ui->audioCodecCombo->currentIndex() == 0 &&
             (mytarget.endsWith(".mp4") || mytarget.endsWith(".mov")))
         consumerNode.setAttribute("strict", "experimental");
+    setSubtitleProperties(consumerNode, service);
 
     // Add autoclose to playlists.
     QDomNodeList playlists = dom.elementsByTagName("playlist");
diff --git a/src/docks/encodedock.h b/src/docks/encodedock.h
index f4586529f6..67e5567efa 100755
--- a/src/docks/encodedock.h
+++ b/src/docks/encodedock.h
@@ -158,6 +158,7 @@ private slots:
     void loadPresets();
     Mlt::Properties *collectProperties(int realtime, bool includeProfile = false);
     void collectProperties(QDomElement &node, int realtime);
+    void setSubtitleProperties(QDomElement &node, Mlt::Producer *service);
     MeltJob *createMeltJob(Mlt::Producer *service, const QString &target, int realtime, int pass = 0,
                            const QThread::Priority priority = Settings.jobPriority());
     void runMelt(const QString &target, int realtime = -1);