跳过 macOS 资源分支文件（._ 开头）避免转码报错

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

av1-transfer/main.py

@@ -97,6 +97,8 @@ def main():
     tasks = []
     print(f"正在扫描目录: {input_root} ...")
     for file in input_root.rglob("*"):
+        if file.name.startswith("._"):
+            continue
         if file.suffix.lower() in VIDEO_EXTS:
             # 计算相对路径并更换后缀为 .mp4
             rel_path = file.relative_to(input_root)