This is working for me:
Code:
rtmpdump -r rtmp://208.167.236.108:1935 -a "live?token=u0@471bf6f6f9cceb9e3bec973abf1048b9_1" -y "4_BBC_One.stream?token=u0@471bf6f6f9cceb9e3bec973abf1048b9_1" --live --debug -W http://ntv.mx/inc/grindplayer/GrindPlayer.swf -p "http://ntv.mx/?c=2&a=0&p=50&cat=16&ch=4"
Probably the token above won't work for you, so you'll have to get a new one. But with the correct token works well.