diff --git a/render.py b/render.py
index 3f379b6..6420eb7 100644
--- a/render.py
+++ b/render.py
@@ -409,7 +409,9 @@ def render_all(options):
     clips_used = []
 
     stats = defaultdict(lambda: 0)
+    fragment_base = base
     for fragment in fragments:
+        fragment_base += 1
         fragment_id = int(fragment['name'].split(' ')[0])
         name = fragment['name'].replace(' ', '_')
         if fragment_id < 10:
@@ -422,7 +424,7 @@ def render_all(options):
         fragment_clips = fragment['clips']
         unused_fragment_clips = [c for c in fragment_clips if c not in clips_used]
         print('fragment clips', len(fragment_clips), 'unused', len(unused_fragment_clips))
-        scene, used = compose(unused_fragment_clips, target=target, base=base, voice_over=fragment['voice_over'])
+        scene, used = compose(unused_fragment_clips, target=target, base=fragment_base, voice_over=fragment['voice_over'])
         clips_used += used
         scene_duration = get_scene_duration(scene)
         print("%s %6.3f -> %6.3f (%6.3f)" % (name, target, scene_duration, fragment_target))