fix VC

app.py

@@ -36,6 +36,7 @@ except ImportError:  # local run — no-op stand-in
 
 import os  # noqa: E402
 from pathlib import Path  # noqa: E402
+from typing import Optional  # noqa: E402
 
 import numpy as np  # noqa: E402
 import scipy.io.wavfile as wavfile  # noqa: E402
@@ -74,6 +75,22 @@ def _save_wav(sample_rate: int, wave: np.ndarray) -> str:
     return str(path)
 
 
+def _ref_audio_path(ref_audio) -> Optional[str]:
+    """Extract the local file path from an ``@app.api()`` file argument.
+
+    Gradio may deliver the uploaded reference as a ``FileData`` object
+    (``.path``), a serialized dict (``{"path": ...}``), or a bare string —
+    normalize all three to the temp path librosa/soundfile can open.
+    """
+    if not ref_audio:
+        return None
+    if isinstance(ref_audio, str):
+        return ref_audio
+    if isinstance(ref_audio, dict):
+        return ref_audio.get("path")
+    return getattr(ref_audio, "path", None)
+
+
 app = Server()
 
 
@@ -82,7 +99,7 @@ app = Server()
 def synthesize(
     mode: str,
     speaker: str,
-    ref_audio: str,
+    ref_audio: Optional[FileData],
     text: str,
     temperature: float,
     top_k: float,
@@ -107,9 +124,16 @@ def synthesize(
             raise ValueError("Please choose a preset speaker.")
         ref_codes = engine.speakers.codes(speaker)
     else:
-        if not ref_audio:
+        # ``@app.api()`` uploads the reference to a local temp file and hands
+        # us its FileData. Depending on the gradio version this arrives as a
+        # ``FileData`` object OR a plain dict — the old ``ref_audio: str``
+        # signature passed the whole dict straight into librosa, which is why
+        # every clone request crashed with "Invalid file: {...}". Pull the
+        # local ``path`` out defensively so both shapes work.
+        ref_path = _ref_audio_path(ref_audio)
+        if not ref_path:
             raise ValueError("Please record or upload a reference clip.")
-        ref_codes = engine.encode_reference(ref_audio)
+        ref_codes = engine.encode_reference(ref_path)
 
     params = GenerationParams(
         temperature=temperature,

index.html

@@ -1226,6 +1226,10 @@ els.renderBtn.addEventListener("click", async () => {
           // Auto-play once loaded
           audioEl.addEventListener("loadedmetadata", () => audioEl.play(), { once: true });
         }
+      } else if (event.type === "status" && event.stage === "error") {
+        // Server-side failure (e.g. bad reference clip): surface it instead
+        // of leaving the UI stuck on "Rendering" with the controls dimmed.
+        throw new Error(event.message || "Rendering failed on the server.");
       }
     }
   } catch (err) {