diff --git a/ox/file.py b/ox/file.py
index 45f3591..5c95b43 100644
--- a/ox/file.py
+++ b/ox/file.py
@@ -68,7 +68,7 @@ def avinfo(filename):
             ffmpeg2theora = local
         p = subprocess.Popen([ffmpeg2theora], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         info, error = p.communicate()
-        version = info.split('\n')[0].split(' ')[-1]
+        version = info.split('\n')[0].split(' - ')[0].split(' ')[-1]
         if version < '0.27':
             raise EnvironmentError('version of ffmpeg2theora needs to be 0.27 or later, found %s' % version)
         p = subprocess.Popen([ffmpeg2theora, '--info', filename],