feat: Enhance audio normalization service to handle invalid analysis values and improve fallback logic

app/services/sound_normalizer.py

@@ -216,6 +216,18 @@ class SoundNormalizerService:
 
             logger.debug("Found JSON match: %s", json_match.group())
             analysis_data = json.loads(json_match.group())
+            
+            # Check for invalid values that would cause second pass to fail
+            invalid_values = ["-inf", "inf", "nan"]
+            for key in ["input_i", "input_lra", "input_tp", "input_thresh", "target_offset"]:
+                if str(analysis_data.get(key, "")).lower() in invalid_values:
+                    logger.warning(
+                        "Invalid analysis value for %s: %s. Falling back to one-pass normalization.", 
+                        key, analysis_data.get(key)
+                    )
+                    # Fall back to one-pass normalization
+                    await self._normalize_audio_one_pass(input_path, output_path)
+                    return
 
             # Second pass: normalize with measured values
             logger.debug("Second pass: normalizing %s with measured values", input_path)