works fine
Code:
rtmpdump -r "rtmps://51a31bcacc912.streamlock.net/alfaconcursos2s" -a "alfaconcursos2s" -W "http://www.alfaconcursos.com.br/imagens/player/player_alfacon.swf" -y "mp4:200/aulas_demo/demo_pj_lin_por.mp4" -T "5bead039555e3046e491864eaa333914" -o "output.flv"