For anyone curious, I found that wisevid is using plain RTMP with SWF verification. This invocation works for me: rtmpdump -r rtmp://stream1.wisevid.com/flvs -s http://wisevid.com/player.swf -y 82330 -a flvs -z -o xxx -w e09b300f1f1e2cc75878ab11258ba4c17f28a315ea9df26f67b37c7f59332737 -x 110543 Starting from this web page http://www.wisevid.com/view_video.php?viewkey=0052slrjt6n74lz84848 The relevant information from that page is in this bit of javascript <script type="text/javascript"> var player = null; function playerReady(thePlayer) { player = window.document[thePlayer.id]; } var so = new SWFObject('player.swf','mpl','570','340','9'); so.addParam('allowscriptaccess','always'); so.addParam('allowfullscreen','true'); so.addParam('wmode','transparent'); so.addParam('flashvars','&file=82330.flv&streamer=rtmp://stream1.wisevid.com/flvs&skin=http://wisevid.com/modieus1.swf&stretching=exactfit&autostart=true&abouttext=WiseVid.com&aboutlink=http://wisevid.com'); so.write('player'); </script> -- hyc