fix: add required language= arg to apply_transcription_request()

api/main.py

@@ -72,6 +72,7 @@ def _transcribe_sync(wav_path: str) -> str:
     inputs = _processor.apply_transcription_request(
         audio=[audio_array],
         format=["WAV"],
+        language="en",
         model_id=MODEL_ID,
         return_tensors="pt",
     )
@@ -516,6 +517,10 @@ async def transcribe_diarize(audio: UploadFile = File(...)):
         loop = asyncio.get_running_loop()
         full_text = await loop.run_in_executor(None, _transcribe_sync, wav_path)
         print(f"[voxtral] {req_id} STT done {(time.perf_counter()-t0)*1000:.0f}ms text_len={len(full_text)}")
+    except Exception as e:
+        import traceback as _tb
+        print(f"[voxtral] {req_id} STT error: {e}\n{_tb.format_exc()}")
+        raise HTTPException(status_code=500, detail=f"Transcription failed: {e}")
     finally:
         if wav_path and os.path.exists(wav_path):
             try: os.unlink(wav_path)

proxy/index.js

@@ -90,11 +90,13 @@ async function proxyToModel(req, res, modelPath, timeoutMs) {
     const r = await fetch(url, { method: "POST", body: form, signal: controller.signal });
     clearTimeout(timeoutId);
 
-    const data = await r.json().catch(() => ({}));
+    const rawText = await r.text().catch(() => "");
+    let data = {};
+    try { data = JSON.parse(rawText); } catch {}
 
     if (!r.ok) {
       const errMsg = data.detail || data.error || "Failed";
-      console.error(`[server] ${reqId} model error ${r.status}: ${errMsg}`);
+      console.error(`[server] ${reqId} model error ${r.status}: ${errMsg} | raw=${rawText.slice(0, 300)}`);
       return res.status(r.status >= 500 ? 502 : r.status).json({
         error: typeof errMsg === "string" ? errMsg : "Model error",
       });