Code:
$ rtmpdump -r "rtmp://212.7.212.22:1935/lb/" -a "lb/" -f "WIN 11,4,402,278" -W
"http://cdn.yycast.com/player/player.swf" -p "http://www.yycast.com/embed.php?f
ileid=skyyd111&vw=620&vh=490" -y "skyyd111" -o skyyd111.flv
RTMPDump v2.4-47-gc26c541
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
INFO: rtmp server sent redirect
INFO: trying to connect with redirected url
Starting download at: 0.000 kB
INFO: Metadata:
INFO: author
INFO: copyright
INFO: description
INFO: keywords
INFO: rating
INFO: title
INFO: presetname Custom
INFO: creationdate Mon Oct 15 20:17:20 2012
INFO: videodevice SCFH DSF
INFO: framerate 29.97
INFO: width 640.00
INFO: height 360.00
INFO: videocodecid avc1
INFO: videodatarate 450.00
INFO: avclevel 31.00
INFO: avcprofile 66.00
INFO: videokeyframe_frequency5.00
INFO: audiodevice Line 1 (Virtual Audio Cable)
INFO: audiosamplerate 22050.00
INFO: audiochannels 1.00
INFO: audioinputvolume 75.00
INFO: audiocodecid .mp3
INFO: audiodatarate 48.00
1036.794 kB / 19.09 sec