add the fade-in and out to the clips

build_clips.py

@@ -2,8 +2,10 @@ import sqlite3
 import os
 import glob
 import subprocess
+import shutil
 
-os.removedirs('clips')
+shutil.rmtree('clips')
+# os.removedirs('clips')
 os.mkdir('clips')
 
 db = sqlite3.connect("file:songbook.sqlite?mode=ro", uri=True)
@@ -40,6 +42,27 @@ for song, motif, start, duration in db.execute('''
 
     print (destination)
 
+    # trim and fade start
+
+    if start / 1000 < 2:
+        trim_start = 0
+        trim_duration = duration / 1000 + start / 1000 + 2
+        fade_in = 0
+        fade_out = 2
+    else: 
+        trim_start = start / 1000 - 2
+        trim_duration = duration / 1000 + 4
+        fade_in = 2
+        fade_out = 2
+
+    # trim and fade end (to be continued)
+
+
+
     # call sox
 
-    subprocess.run(["sox", source, destination, "trim", f'{start / 1000}', f'{duration / 1000}'], check = True)
+    sox_args = [str(x) for x in ["sox", source, destination,
+                "trim", trim_start, trim_duration,
+                "fade", "t", fade_in, "-0", fade_out]]
+    print(' '.join(sox_args))
+    subprocess.run(sox_args, check = True)