playbin question -- playing an audio -- filepath error on windows

[cppb]

Dear all,

I am trying to play some audio files with the CLI example on this site:

http://pygstdocs.berlios.de/pygst-tutorial/playbin.html

I am on windows and it is giving error while reading the file. I specified the following path:

$ python cliplayer.py C:\\voice.mp3

0:00:00.125000000  3788   009DA010 ERROR                basesrc gstbasesrc.c:2834:gst_base_src_activate_pull:<source> Failed to start in pull mode
Error: Could not open resource for reading. ..\..\..\Source\gst-plugins-base\ext\gio\gstgiosrc.c(324): gst_gio_src_get_stream (): /GstPlayBin2:player/GstURIDecodeBin:uridecodebin0/GstGioSrc:source:
Could not open location file:///C:/file:/C:/voice.mp3 for reading: Error opening file: Invalid argument

How should I specify the file path on windows??

Also, is there anything special I need to do in this line of code?

self.player.set_property("uri", "file://" + filepath)


Thank you!