stream=pyffmpeg.VideoStream()
stream.open(filepath)

Traceback (most recent call last):
  File "test.py", line 24, in test
    stream.open(filepath)
  File "pyffmpeg.pyx", line 2467, in pyffmpeg.VideoStream.open (pyffmpeg.c:16607)
  File "pyffmpeg.pyx", line 1920, in pyffmpeg.FFMpegReader.open (pyffmpeg.c:11361)
IOError: Unable to open file test.mp4 (url_fopen)
Segmentation fault