Implement API URL resolution in OpenAICompatibleASRService to ensure correct endpoint handling for transcription requests.

engine/services/openai_compatible_asr.py

@@ -9,6 +9,7 @@ import io
 import os
 import wave
 from typing import AsyncIterator, Optional, Callable, Awaitable
+from urllib.parse import urlparse, urlunparse
 from loguru import logger
 
 try:
@@ -75,7 +76,8 @@ class OpenAICompatibleASRService(BaseASRService):
             raise RuntimeError("aiohttp is required for OpenAICompatibleASRService")
         
         self.api_key = api_key or os.getenv("ASR_API_KEY") or os.getenv("SILICONFLOW_API_KEY")
-        self.api_url = api_url or os.getenv("ASR_API_URL") or self.API_URL
+        raw_api_url = api_url or os.getenv("ASR_API_URL") or self.API_URL
+        self.api_url = self._resolve_transcriptions_endpoint(raw_api_url)
         self.model = self.MODELS.get(model.lower(), model)
         self.interim_interval_ms = interim_interval_ms
         self.min_audio_for_interim_ms = min_audio_for_interim_ms
@@ -98,6 +100,30 @@ class OpenAICompatibleASRService(BaseASRService):
         
         logger.info(f"OpenAICompatibleASRService initialized with model: {self.model}")
 
+    @staticmethod
+    def _resolve_transcriptions_endpoint(api_url: str) -> str:
+        """
+        Accept either:
+        - base URL: https://host/v1
+        - full endpoint: https://host/v1/audio/transcriptions
+        and always return the final transcriptions endpoint URL.
+        """
+        raw = str(api_url or "").strip()
+        if not raw:
+            return OpenAICompatibleASRService.API_URL
+
+        parsed = urlparse(raw)
+        path = (parsed.path or "").rstrip("/")
+        if path.endswith("/audio/transcriptions"):
+            return raw
+
+        if not path:
+            new_path = "/audio/transcriptions"
+        else:
+            new_path = f"{path}/audio/transcriptions"
+
+        return urlunparse(parsed._replace(path=new_path))
+    
     async def connect(self) -> None:
         """Connect to the service."""
         if not self.api_key: