diff --git a/removeads.py b/removeads.py
index 180c0b3..956e434 100755
--- a/removeads.py
+++ b/removeads.py
@@ -256,12 +256,13 @@ def getFramesInStream(inputFile, begin, end, streamKind, subStreamId=0):
             frames = frames['frames']
             for frame in frames:
                 if 'pts_time' in frame:
-                    pts_time = frame['pts_time']
+                    pts_time = float(frame['pts_time'])
                 elif 'pkt_pts_time' in frame:
-                    pts_time = frame['pkt_pts_time']
+                    pts_time = float(frame['pkt_pts_time'])
                 else:
                     logger.error('Impossible to find timestamp of frame %s' % frame)
                     return None
+                
                 ts = timedelta(seconds=pts_time)
                 if begin <= ts and ts <= end:
                     res.append(frame)