Fix Mask: Apply filter should use qtblend now

Only the qtblend transition supports 10-bit via rgba64.

Author: ddennedy

src/mltxmlchecker.cpp

@@ -265,6 +265,7 @@ void MltXmlChecker::processProperties()
         checkUnlinkedFile(mlt_service);
         checkIncludesSelf(newProperties);
         checkLumaAlphaOver(mlt_service, newProperties);
+        updateMaskApply(mlt_service, newProperties);
         checkAudioGain(mlt_service, newProperties);
         replaceWebVfxCropFilters(mlt_service, newProperties);
         replaceWebVfxChoppyFilter(mlt_service, newProperties);
@@ -561,6 +562,19 @@ void MltXmlChecker::checkIncludesSelf(QVector<MltProperty> &properties)
     }
 }
 
+void MltXmlChecker::updateMaskApply(const QString &mlt_service, QVector<MltProperty> &properties)
+{
+    if (mlt_service == "mask_apply") {
+        for (auto &p : properties) {
+            if (p.first == "transition") {
+                p.second = "qtblend";
+                m_isUpdated = true;
+                break;
+            }
+        }
+    }
+}
+
 void MltXmlChecker::checkAudioGain(const QString &mlt_service, QVector<MltProperty> &properties)
 {
     if (mlt_service == "volume") {

src/mltxmlchecker.h

@@ -67,6 +67,7 @@ class MltXmlChecker
     bool fixVersion1701WindowsPathBug(QString &value);
     void checkIncludesSelf(QVector<MltProperty> &properties);
     void checkLumaAlphaOver(const QString &mlt_service, QVector<MltProperty> &properties);
+    void updateMaskApply(const QString &mlt_service, QVector<MltProperty> &properties);
     void checkAudioGain(const QString &mlt_service, QVector<MltProperty> &properties);
     void replaceWebVfxCropFilters(QString &mlt_service, QVector<MltProperty> &properties);
     void replaceWebVfxChoppyFilter(QString &mlt_service, QVector<MltProperty> &properties);

src/qml/filters/mask_apply/ui.qml

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2025 Meltytech, LLC
+ * Copyright (c) 2020-2026 Meltytech, LLC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,7 +20,7 @@ Item {
     width: 10
     height: 10
     Component.onCompleted: {
-        filter.set('transition', 'frei0r.cairoblend')
+        filter.set('transition', 'qtblend')
         filter.set('transition.threads', 0);
     }
 }