diff --git a/youtube_dl/extractor/appletrailers.py b/youtube_dl/extractor/appletrailers.py
index dc8657b67..4359b88d1 100644
--- a/youtube_dl/extractor/appletrailers.py
+++ b/youtube_dl/extractor/appletrailers.py
@@ -6,6 +6,7 @@ import json
 from .common import InfoExtractor
 from ..utils import (
     compat_urlparse,
+    int_or_none,
 )
 
 
@@ -110,8 +111,8 @@ class AppleTrailersIE(InfoExtractor):
                 formats.append({
                     'url': format_url,
                     'format': format['type'],
-                    'width': format['width'],
-                    'height': int(format['height']),
+                    'width': int_or_none(format['width']),
+                    'height': int_or_none(format['height']),
                 })
 
             self._sort_formats(formats)
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 9b94407f4..65b492fb3 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1273,8 +1273,11 @@ def int_or_none(v, scale=1, default=None, get_attr=None, invscale=1):
     if get_attr:
         if v is not None:
             v = getattr(v, get_attr, None)
+    if v == '':
+        v = None
     return default if v is None else (int(v) * invscale // scale)
 
+
 def str_or_none(v, default=None):
     return default if v is None else compat_str(v)