diff --git a/encode.py b/encode.py
index 9115bc1..6cef8ee 100755
--- a/encode.py
+++ b/encode.py
@@ -4,6 +4,7 @@ import os
 import json
 import shutil
 import subprocess
+import sys
 
 def get_videoduration(video):
     cmd = [
@@ -32,9 +33,7 @@ def is_new(xml, mp4):
     )
     return vtime < xtime
 
-for xml in sorted(glob('output/*/*.xml')):
-    if xml.endswith('.audio.xml'):
-        continue
+def encode(xml, force=False):
     audio_xml = xml.replace('.xml', '.audio.xml')
     mp4 = xml.replace('.xml', '.mp4')
     mp4_480p = mp4.replace('.mp4', '.480p.mp4')
@@ -42,7 +41,7 @@ for xml in sorted(glob('output/*/*.xml')):
     pre_480p = mp4_480p + '.pre.mp4'
     video = mp4 + '.v.mp4'
     audio = mp4 + '.wav'
-    if is_new(xml, mp4):
+    if force or is_new(xml, mp4):
         subprocess.call([
             'qmelt', xml, '-consumer', 'avformat:' + video, 'vcodec=libx264', 'strict=-2'
         ])
@@ -73,3 +72,15 @@ for xml in sorted(glob('output/*/*.xml')):
         ]
         subprocess.call(cmd)
         shutil.move(pre_480p, mp4_480p)
+
+def encode_all():
+    for xml in sorted(glob('output/*/*.xml')):
+        if xml.endswith('.audio.xml') or xml.endswith('.vocals.xml'):
+            continue
+        encode(xml)
+
+if __name__ == '__main__':
+    if len(sys.argv) == 2:
+        encode(sys.argv[1], True)
+    else:
+        encode_all()