ltx-2.3-i2v API: DURATION_SECONDS constant + 10s clamp

workflows/api/ltx-2.3-i2v.json

@@ -311,7 +311,10 @@
     },
     "class_type": "PrimitiveInt",
     "inputs": {
-      "value": 5
+      "value": [
+        "340",
+        0
+      ]
     }
   },
   "320:302": {
@@ -541,8 +544,8 @@
     "inputs": {
       "expression": "a * b + 1",
       "values.a": [
-        "320:301",
-        0
+        "320:333",
+        1
       ],
       "values.b": [
         "320:300",
@@ -678,6 +681,28 @@
       ]
     }
   },
+  "320:333": {
+    "_meta": {
+      "title": "duration ceiling: 10 s max"
+    },
+    "class_type": "ComfyMathExpression",
+    "inputs": {
+      "expression": "min(max(a, 1), 10)",
+      "values.a": [
+        "320:301",
+        0
+      ]
+    }
+  },
+  "340": {
+    "_meta": {
+      "title": "DURATION_SECONDS (max 10)"
+    },
+    "class_type": "PrimitiveInt",
+    "inputs": {
+      "value": 5
+    }
+  },
   "75": {
     "class_type": "SaveVideo",
     "inputs": {