add audio finecut

.gitignore

@@ -1,2 +1,2 @@
 data/
-output/*.mp3
+output/**/*.mp3

biaori.py

@@ -95,7 +95,8 @@ def process_basic(book, unit, lesson, key):
                     'section': sec,
                     'tags': f'book{book} book{book}-lesson{lesson:02d}'
                 })
-                export_audo_clip(audio_fn, f'./output/{clip_fn}', start, end)
+                export_audo_clip(
+                        audio_fn, f'./output/audio/{clip_fn}', start, end)
 
                 txt_buff_cn.clear()
                 txt_buff_jp.clear()

scripts/finecut.py

@@ -0,0 +1,61 @@
+from glob import glob
+
+from pydub import AudioSegment
+import audioop
+
+
+def get_avg(audio, start, end):
+    return abs(audioop.avg(audio[start:end]._data, audio.sample_width))
+
+
+def cut(filename, ms):
+    audio = AudioSegment.from_mp3(filename)
+    audio[ms:].export(filename.replace('audio/', 'audio-finecut/'))
+
+
+def finecut(filename, skip=0):
+    audio = AudioSegment.from_mp3(filename)
+    idx = skip
+    while idx < 2000 and get_avg(audio, idx, idx+100) > 1:
+        idx += 50
+    while idx < 2000 and get_avg(audio, idx, idx+100) <= 1:
+        idx += 50
+    if idx < 2000:
+        audio = audio[idx:]
+    print(f'Cut {filename}: {idx}ms')
+    audio.export(filename.replace('audio/', 'audio-finecut/'))
+
+
+def main():
+    fs = glob('./output/audio/*.mp3')
+    for f in sorted(fs):
+        finecut(f)
+
+    finecut('./output/audio/book1-lesson01-basic-A.mp3', 1000)
+    finecut('./output/audio/book1-lesson01-basic-D.mp3', 300)
+    finecut('./output/audio/book1-lesson02-basic-A.mp3', 300)
+    finecut('./output/audio/book1-lesson18-basic-A.mp3', 300)
+    finecut('./output/audio/book1-lesson24-basic-C.mp3', 300)
+    finecut('./output/audio/book1-lesson37-basic-C.mp3', 1000)
+    finecut('./output/audio/book1-lesson41-basic-C.mp3', 1000)
+    finecut('./output/audio/book1-lesson46-basic-4.mp3', 300)
+    finecut('./output/audio/book1-lesson46-basic-A.mp3', 300)
+    finecut('./output/audio/book1-lesson47-basic-A.mp3', 300)
+    finecut('./output/audio/book1-lesson48-basic-B.mp3', 1000)
+
+    cut('./output/audio/book1-lesson04-basic-C.mp3', 0)
+    cut('./output/audio/book1-lesson08-basic-1.mp3', 0)
+    cut('./output/audio/book1-lesson08-basic-2.mp3', 0)
+    cut('./output/audio/book1-lesson11-basic-2.mp3', 0)
+    cut('./output/audio/book1-lesson13-basic-B.mp3', 0)
+    cut('./output/audio/book1-lesson17-basic-1.mp3', 0)
+    cut('./output/audio/book1-lesson28-basic-3.mp3', 0)
+    cut('./output/audio/book1-lesson28-basic-4.mp3', 0)
+    cut('./output/audio/book1-lesson34-basic-D.mp3', 0)
+    cut('./output/audio/book1-lesson36-basic-B.mp3', 0)
+
+    cut('./output/audio/book1-lesson46-basic-D.mp3', 800)
+
+
+if __name__ == '__main__':
+    main()