By the way, here is example of the netflowjs output from mikrotik version9 flow:
{ header:
{ version: 9,
count: 20,
uptime: 387036340,
seconds: 1448913629,
sequence: 50976101,
sourceId: 0 },
flows:
[ { last_switched: 387021220,
first_switched: 387021220,
in_pkts: 3,
in_bytes: 156,
input_snmp: 19,
output_snmp: 18,
ipv4_src_addr: '46.33.68.47',
ipv4_dst_addr: '7.777.176.64',
protocol: 6,
src_tos: 0,
l4_src_port: 80,
l4_dst_port: 18477,
ipv4_next_hop: '192.168.9.10',
dst_mask: 0,
src_mask: 0,
tcp_flags: 17,
in_dst_mac: '4c5e0c242dc5',
out_src_mac: '4c5e0c242dc3',
postNATSourceIPv4Address: '46.33.68.47',
postNATDestinationIPv4Address: '172.16.26.78',
postNAPTSourceTransportPort: 80,
postNAPTDestinationTransportPort: 18477,
fsId: 256 },
{ ...