diff --git a/src/BowongModalFunctions/models/requests/models.py b/src/BowongModalFunctions/models/requests/models.py
index f61802c..3e87400 100644
--- a/src/BowongModalFunctions/models/requests/models.py
+++ b/src/BowongModalFunctions/models/requests/models.py
@@ -323,6 +323,26 @@ class FFMPEGVideoLoopFillAudioRequest(BaseFFMPEGTaskRequest):
     video: MediaSource = Field(description="用来填充的视频素材")
     audio: MediaSource = Field(description="被填充的音频素材")
 
+    @field_validator('video', mode='before')
+    @classmethod
+    def parse_video_input(cls, v: Union[str, MediaSource]):
+        if isinstance(v, str):
+            return MediaSource.from_str(v)
+        elif isinstance(v, MediaSource):
+            return v
+        else:
+            raise TypeError(v)
+
+    @field_validator('audio', mode='before')
+    @classmethod
+    def parse_audio_input(cls, v: Union[str, MediaSource]):
+        if isinstance(v, str):
+            return MediaSource.from_str(v)
+        elif isinstance(v, MediaSource):
+            return v
+        else:
+            raise TypeError(v)
+
 
 class FFMPEGExtractFrameRequest(BaseFFMPEGTaskRequest):
     video: MediaSource = Field(description="提取帧画面的来源")