Add no-tkinter Windows fallback

pvd_mezzanine.py

@@ -712,8 +712,7 @@ class MezzanineApp:
 
 def run_ui() -> int:
     if tk is None:
-        print("Tkinter ist nicht verfuegbar. Bitte Datei per CLI uebergeben.")
-        return 1
+        return run_no_tk_fallback()
     root = tk.Tk()
     app = MezzanineApp(root)
     if len(sys.argv) > 1 and os.path.isfile(sys.argv[1]):
@@ -722,6 +721,48 @@ def run_ui() -> int:
     return 0
 
 
+def run_no_tk_fallback() -> int:
+    if len(sys.argv) > 1 and os.path.isfile(sys.argv[1]):
+        print("Tkinter ist nicht verfuegbar. Starte Drag-and-Drop-Datei direkt im CLI-Modus.")
+        return run_cli(sys.argv[1], OUTPUT_BASE_DIR)
+
+    print("Tkinter ist nicht verfuegbar. Oeffne Windows-Dateidialoge als Fallback.")
+    selected = choose_paths_with_powershell()
+    if selected is None:
+        print("Keine Quelle ausgewaehlt.")
+        return 1
+    input_file, output_dir = selected
+    return run_cli(input_file, output_dir)
+
+
+def choose_paths_with_powershell() -> tuple[str, str] | None:
+    script = r"""
+Add-Type -AssemblyName System.Windows.Forms
+$open = New-Object System.Windows.Forms.OpenFileDialog
+$open.Title = 'Basis-Video auswaehlen'
+$open.Filter = 'Video-Dateien (*.mov;*.mxf;*.mp4;*.mkv;*.ts;*.m2ts;*.vob)|*.mov;*.mxf;*.mp4;*.mkv;*.ts;*.m2ts;*.vob|Alle Dateien (*.*)|*.*'
+if ($open.ShowDialog() -ne [System.Windows.Forms.DialogResult]::OK) { exit 2 }
+$folder = New-Object System.Windows.Forms.FolderBrowserDialog
+$folder.Description = 'Ausgabeordner auswaehlen'
+$folder.SelectedPath = 'H:\VOD'
+if ($folder.ShowDialog() -ne [System.Windows.Forms.DialogResult]::OK) { exit 2 }
+Write-Output $open.FileName
+Write-Output $folder.SelectedPath
+"""
+    result = subprocess.run(
+        ["powershell", "-NoProfile", "-STA", "-Command", script],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    if result.returncode != 0:
+        return None
+    lines = [line.strip() for line in result.stdout.splitlines() if line.strip()]
+    if len(lines) < 2:
+        return None
+    return lines[0], lines[1]
+
+
 def main() -> int:
     if len(sys.argv) > 2 and sys.argv[1] == "--cli":
         return run_cli(sys.argv[2], OUTPUT_BASE_DIR)