diff --git a/fam-edge/src/fam_edge/model_adapters/gemini_adapter.py b/fam-edge/src/fam_edge/model_adapters/gemini_adapter.py
index 9efe515..6cfb2a1 100644
--- a/fam-edge/src/fam_edge/model_adapters/gemini_adapter.py
+++ b/fam-edge/src/fam_edge/model_adapters/gemini_adapter.py
@@ -126,7 +126,8 @@ class GeminiAdapter(BaseModelAdapter):
         name = os.path.basename(video_path)
         size = os.path.getsize(video_path)
         upload_timeout = max(self.timeout, 900)
-        base = f"{self._base_url}/files?key={self.api_key}"
+        # 上传端点必须是 /upload/v1beta/files（/v1beta/files 只是元数据端点，不接受上传协议）
+        base = f"https://generativelanguage.googleapis.com/upload/v1beta/files?key={self.api_key}"
         # 1) 创建可续传上传会话
         try:
             r0 = requests.post(
diff --git a/fam-edge/src/fam_edge/model_adapters/nvidia_adapter.py b/fam-edge/src/fam_edge/model_adapters/nvidia_adapter.py
index 113d79c..5a4209b 100644
--- a/fam-edge/src/fam_edge/model_adapters/nvidia_adapter.py
+++ b/fam-edge/src/fam_edge/model_adapters/nvidia_adapter.py
@@ -106,7 +106,9 @@ class NvidiaVisionAdapter(BaseModelAdapter):
                 up = requests.put(
                     upload_url,
                     data=f,
-                    headers={"Content-Type": "application/octet-stream"},
+                    # 注意：必须用小写 header 名，预签名 S3 URL 的签名覆盖小写 content-type
+                    headers={"content-type": "application/octet-stream",
+                             "x-amz-meta-nvcf-asset-description": "fam-edge video asset"},
                     timeout=upload_timeout,
                 )
         except requests.Timeout: