UnboundLocalError: local variable 'stream' referenced before assignment

[realchrisolin]

 $ gopro2gpx -v GS051392.360 ~/test

Traceback (most recent call last):
  File "/usr/local/bin/gopro2gpx", line 5, in <module>
    from gopro2gpx.__main__ import main
  File "/home/colin/.local/lib/python3.9/site-packages/gopro2gpx/__main__.py", line 3, in <module>
    main()
  File "/home/colin/.local/lib/python3.9/site-packages/gopro2gpx/gopro2gpx.py", line 148, in main
    data = parser.readFromMP4()
  File "/home/colin/.local/lib/python3.9/site-packages/gopro2gpx/gpmf.py", line 52, in readFromMP4
    print("Working on file %s track %s (%s)" % (self.file, track_number, stream))
UnboundLocalError: local variable 'stream' referenced before assignment