From fe3e642dfa4a405ab6cb97ea806329b1b469f02b Mon Sep 17 00:00:00 2001
From: Ethanfel <ethan.fel@ts-pc.fr>
Date: Mon, 6 Apr 2026 17:19:03 +0200
Subject: [PATCH] fix: guard mask generation against WebP sequence export path

---
 main.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/main.py b/main.py
index f2d3241..535f0e5 100644
--- a/main.py
+++ b/main.py
@@ -1039,6 +1039,9 @@ class MainWindow(QMainWindow):
         if not self._last_export_path:
             self.statusBar().showMessage("No clip exported yet — export first.")
             return
+        if os.path.isdir(self._last_export_path):
+            self.statusBar().showMessage("Mask generation requires an MP4 export — switch format to MP4 and export first.")
+            return
         if self._mask_worker and self._mask_worker.isRunning():
             self.statusBar().showMessage("Mask generation already running…")
             return