diff --git a/management/commands/render.py b/management/commands/render.py
index 24ba964..655c577 100644
--- a/management/commands/render.py
+++ b/management/commands/render.py
@@ -30,10 +30,21 @@ class Command(BaseCommand):
             json.dump(scene, fd, indent=2, ensure_ascii=False)
         if not options['no_video']:
             for timeline in timelines:
+                ext = '.mp4'
+                if '-audio.kdenlive' in timeline:
+                    ext = '.wav'
                 cmd = [
                     'xvfb-run', '-a',
                     'melt', timeline,
-                    '-consumer', 'avformat:%s' % timeline.replace('.kdenlive', '.mp4')
+                    '-consumer', 'avformat:%s' % timeline.replace('.kdenlive', ext)
                 ]
                 subprocess.call(cmd)
+                if ext == '.wav':
+                    cmd = [
+                        'ffmpeg', '-i',
+                        timeline.replace('.kdenlive', ext),
+                        timeline.replace('.kdenlive', '.mp4')
+                    ]
+                    subprocess.call(cmd)
+                    os.unlink(timeline.replace('.kdenlive', ext))