1 files changed, 20 insertions, 0 deletions
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 2e48f187e..83a274043 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1098,3 +1098,23 @@ def url_basename(url):
 class HEADRequest(compat_urllib_request.Request):
     def get_method(self):
         return "HEAD"
+
+
+def int_or_none(v):
+    return v if v is None else int(v)
+
+
+def parse_duration(s):
+    if s is None:
+        return None
+
+    m = re.match(
+        r'(?:(?:(?P<hours>[0-9]+):)?(?P<mins>[0-9]+):)?(?P<secs>[0-9]+)$', s)
+    if not m:
+        return None
+    res = int(m.group('secs'))
+    if m.group('mins'):
+        res += int(m.group('mins')) * 60
+        if m.group('hours'):
+            res += int(m.group('hours')) * 60 * 60
+    return res