Clip stabilize: keep track of bin clip rotation.

Related to #1316

src/bin/projectclip.cpp

@@ -2208,3 +2208,15 @@ void ProjectClip::importJsonMarkers(const QString &json)
 {
     getMarkerModel()->importFromJson(json, true);
 }
+
+const QStringList ProjectClip::enforcedParams() const
+{
+    QStringList params;
+    QStringList paramNames = {QStringLiteral("rotate"),QStringLiteral("autorotate")};
+    for (auto &name : paramNames) {
+        if (hasProducerProperty(name)) {
+            params << QString("%1=%2").arg(name, getProducerProperty(name));
+        }
+    }
+    return params;
+}

src/bin/projectclip.h

@@ -234,6 +234,8 @@ public:
     int getAudioMax(int stream);
     /** @brief Refresh zones of insertion in timeline. */
     void refreshBounds();
+    /** @brief Retuns a list of important enforces parameters in MLT format, for example to disable autorotate. */
+    const QStringList enforcedParams() const;
 
 protected:
     friend class ClipModel;

src/jobs/stabilizetask.cpp

@@ -113,6 +113,8 @@ void StabilizeTask::run()
             return;
         }
         producerArgs << url;
+        producerArgs << binClip->enforcedParams();
+
         if (m_inPoint > -1) {
            producerArgs << QString("in=%1").arg(m_inPoint);
         }