Update api/ltx_server.py

api/ltx_server.py

@@ -539,7 +539,7 @@ class VideoService:
         with tempfile.NamedTemporaryFile("w", delete=False, suffix=".txt") as f:
             ind =0
             for mp4 in mp4_list:
-                ind =+ 1
+                ind += 1
                 print(f"frames {mp4} {self._get_total_frames}")
                 f.write(f"file '{os.path.abspath(mp4)}'\n")
             list_path = f.name