make sure all tracks are exactly the same length

render_kdenlive.py

@@ -4,6 +4,7 @@ import subprocess
 import lxml.etree
 import uuid
 import os
+import sys
 
 _CACHE = {}
 _IDS = defaultdict(int)
@@ -12,6 +13,14 @@ def get_propery(element, name):
     return element.xpath('property[@name="%s"]' % name)[0].text
 
 
+def get_melt():
+    cmd = ['melt']
+    if 'XDG_RUNTIME_DIR' not in os.environ:
+        os.environ['XDG_RUNTIME_DIR'] = '/tmp/runtime-pandora'
+    if 'DISPLAY' not in os.environ:
+        cmd = ['xvfb-run', '-a'] + cmd
+    return cmd
+
 def melt_xml(file):
     out = None
     real_path = os.path.realpath(file)
@@ -20,7 +29,8 @@ def melt_xml(file):
         if os.stat(real_path).st_mtime != ts:
             out = None
     if not out:
-        out = subprocess.check_output(['melt', file, '-consumer', 'xml']).decode()
+        cmd = get_melt() + [file, '-consumer', 'xml']
+        out = subprocess.check_output(cmd).decode()
         _CACHE[file] = [os.stat(real_path).st_mtime, out]
     return out