Ok still no success:
Btw. the rtmp URL has changed. in rtmp://cp86438.live.edgefcs.net/live/livestream3_246@56855
When I use that command rtmpdump -r rtmp://cp86438.live.edgefcs.net/live/livestream3_246@56855 -a live -y livestream3_246@56855 -c 443 -W "https://cdn.livestream.com/grid/LSPlayer.swf" --live | "C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" -
this happen:
When I try that with the other swf player the RTMP_ReadPacket Error appers directly without showing me the stream about 1min like it is the case with the command I posted here.