use --start 3830
Code:
rtmpdump -r "rtmp://bbcmedia.fcod.llnwd.net:1935/a1414/e3" -a "a1414/e3?
as=adobe-hmac-sha256&av=1&te=connect&mp=iplayerstream/secure_auth/480kbps/MP/b01
m1l2l_1344830998.mp4,iplayerstream/secure_auth/800kbps/MP/b01m1l2l_1344830998.mp
4,iplayerstream/secure_auth/1500kbps/MP/b01m1l2l_1344830671.mp4,iplayerstream/se
cure_auth/400kbps/b01m1l2l_1344830998.mp4&et=1344894927&fmta-token=7ceb10a3fa239
0e65f11cadfb562b44293c3a8ca198b2ca5db6f729e5174ab9d" -f "WIN 11,3,300,265" -W "h
ttp://www.bbc.co.uk/emp/releases/iplayer/revisions/617463_618125_4/617463_618125
_4_emp.swf" -p "http://www.bbc.co.uk/iplayer/episode/b01m1l2q/Olympic_Ceremonies
_London_2012_Closing_Ceremony/?t=1h03m50s" -C O:1 -C O:0 -y "mp4:iplayerstream/s
ecure_auth/480kbps/MP/b01m1l2l_1344830998.mp4" -o "b01m1l2l_1344830998.flv" --st
art 3830
RTMPDump
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
Starting download at: 0.000 kB
INFO: Metadata:
INFO: duration 11872.52
INFO: moovPosition 32.00
INFO: width 640.00
INFO: height 360.00
INFO: videocodecid avc1
INFO: audiocodecid mp4a
INFO: avcprofile 66.00
INFO: avclevel 30.00
INFO: aacaot 2.00
INFO: videoframerate 25.00
INFO: audiosamplerate 44100.00
INFO: audiochannels 2.00
INFO: trackinfo:
INFO: length 296812000.00
INFO: timescale 25000.00
INFO: language eng
INFO: sampledescription:
INFO: sampletype avc1
INFO: length 523578368.00
INFO: timescale 44100.00
INFO: language eng
INFO: sampledescription:
INFO: sampletype mp4a
10454.678 kB / 4037.68 sec (34.0%)