ADD 增加视频帧位计算、字符串判空节点

PERF 重构项目结构

nodes/string_empty_judgement.py

@@ -0,0 +1,21 @@
+class StringEmptyJudgement:
+    @classmethod
+    def INPUT_TYPES(s):
+        return {
+            "required": {
+                "input": ("STRING", {"forceInput": True}),
+            },
+        }
+
+    RETURN_TYPES = ("BOOLEAN", )
+    RETURN_NAMES = ("是否为空", )
+
+    FUNCTION = "compute"
+
+    CATEGORY = "不忘科技-自定义节点🚩"
+
+    def compute(self, input):
+        if len(input) == 0:
+            return (True, )
+        else:
+            return (False, )