Update audio processing state: next_index=742

processing_audio_state.json

@@ -1,5 +1,5 @@
 {
-  "next_download_index": 741,
+  "next_download_index": 742,
   "file_states": {
     "audio/\u5982\u4f55\u6fc0\u6d3b\u5b57\u5e55.wav": "processed",
     "audio/week08 11 space switching.wav": "processed",
@@ -589,6 +589,7 @@
     "audio/4.Motion Beast 2 Lesson 12 Basic Redshift Light.wav": "failed",
     "audio/4.Homework Review.wav": "failed",
     "audio/4.9 Remove anything from video.wav": "failed",
-    "audio/4.8 Rotoscoping _ Advanced Masking.wav": "failed"
+    "audio/4.8 Rotoscoping _ Advanced Masking.wav": "failed",
+    "audio/4.7 Sky Replacement _ Masking techniques.wav": "failed"
   }
 }