Get the media resource locator (mrl) from a media descriptor object.
    @param p_md: a media descriptor object.
    @return: string with mrl of media descriptor object.

def libvlc_media_get_mrl(p_md):
    '''Get the media resource locator (mrl) from a media descriptor object.
    @param p_md: a media descriptor object.
    @return: string with mrl of media descriptor object.
    '''
    f = _Cfunctions.get('libvlc_media_get_mrl', None) or \
        _Cfunction('libvlc_media_get_mrl', ((1,),), string_result,
                    ctypes.c_void_p, Media)
    return f(p_md)