support target fps

examples/wanvideo/train_wan_t2v.py

@@ -403,6 +403,12 @@ def parse_args():
         default=81,
         help="Number of frames.",
     )
+    parser.add_argument(
+        "--target_fps",
+        type=int,
+        default=None,
+        help="Expected FPS for sampling frames.",
+    )
     parser.add_argument(
         "--height",
         type=int,