Update utils/audio_processing.py

utils/audio_processing.py

@@ -75,13 +75,13 @@ def download_audio_as_wav(url, max_filesize_mb=70):
             # Convert to WAV (outside temp_dir so it persists)
             temp_wav = tempfile.NamedTemporaryFile(delete=False, suffix=".wav")
             convert_cmd = ["ffmpeg", "-y", "-i", audio_path, temp_wav.name]
-            subprocess.run(convert_cmd, stdout=subprocess.PIPE("utf-8", errors="ignore"), stderr=subprocess.PIPE("utf-8", errors="ignore"), check=True)
+            subprocess.run(convert_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, check=True)
 
             # Return WAV file path; temp_dir and downloaded audio cleaned automatically
             return temp_wav.name
 
     except subprocess.CalledProcessError as e:
-        error_msg = e.stderr.decode("utf-8", errors="ignore")
+        error_msg =  e.stderr.decode("utf-8", errors="replace") if e.stderr else str(e)
         if "st" in globals():
             st.error("Audio download or conversion failed.")
             st.code(error_msg)