Re: Specify the tcURL or rtmpdump might not work

hyc · #6 11-08-2011, 03:28 AM

Quote:

Originally Posted by WatchbbcDotOrg

Found a nasty bug in rtmpdump. The buffer that is used internally to construct the tcUrl, if it isn't explicitily passed, is too small. Here's an example from the BBC. First what I passed rtmpdump and then you can see the information it echoed back. That's not just a truncated display of the tcUrl, that's actually what it is passing the server. The work-around is to explicitly pass the tcUrl, and everything is dandy.

rtmpdump -a "a1414/e3?as=adobe-hmac-sha256&av=1&te=connect&mp=iplayerstream/secure_auth/480kbps/MP/b00tyr8w_1320405462.mp4,iplayerstream/secure_auth/480kbps/MP/b00tyr8w_1320405462.mp4,iplayerstream/secure_auth/1500kbps/MP/b00tyr8w_1320405154.mp4,iplayerstream/secure_auth/400kbps/b00tyr8w_1320405462.mp4,iplayerstream/secure_auth/800kbps/MP/b00tyr8w_1320405470.mp4,iplayerstream/secure_auth/1500kbps/MP/b00tyr8w_1320405154.mp4,iplayerstream/secure_auth/800kbps/MP/b00tyr8w_1320405470.mp4,iplayerstream/secure_auth/100kbps/b00tyr8w_1320405462.mp4,prod_3gp_mpeg4_med/iplayerstream/prod_3gp_mpeg4_med/wifi_CBeebies_Bedtime_Stories_Episode_179_b00tyr8w _1320405462.mp4&et=1320450031&fmta-token=22853c1460014856485cfba5469a8b4014e6434ef464 a015f6fb0ef6d6ec4432" --host "bbcmedia.fcod.llnwd.net" --playpath "mp4:iplayerstream/secure_auth/1500kbps/MP/b00tyr8w_1320405154.mp4" -s "http://www.bbc.co.uk/emp/iplayer/revisions/617463_618125_3/617463_618125_3_emp.swf" --port 1935 --protocol "rtmp" -o activedl.flv

RTMPDump v2.3
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
DEBUG: Protocol : RTMP
DEBUG: Hostname : bbcmedia.fcod.llnwd.net
DEBUG: Port : 1935
DEBUG: Playpath : mp4:iplayerstream/secure_auth/1500kbps/MP/b00tyr8w_1320405154.mp4
DEBUG: tcUrl : rtmp://bbcmedia.fcod.llnwd.net:1935/a1414/e3?as=adobe-hmac-sha256&av=1&te=connect&mp=iplayerstream/secure_auth/480kbps/MP/b00tyr8w_1320405462.mp4,prod_3gp_mpeg4_med/iplayerstream/prod_3gp_mpeg4_med/wifi_CBeebies_Bedtime_Stories_Episode_179_b00tyr8w _1320405462.mp4,iplayerstream/secure_auth/1500kbps/MP/b00tyr8w_1320405154.mp4,iplayerstream/secure_auth/400kbps/b00tyr8w_1320405462.mp4,iplayerstream/secure_auth/800kbps/MP/b00tyr8w_1320405470.mp4,iplayerstream/secure_auth/100kbps/b00tyr8w_1320405462.mp4,iplayer
DEBUG: swfUrl : http://www.bbc.co.uk/emp/iplayer/rev...8125_3_emp.swf
DEBUG: pageUrl : http://www.bbc.co.uk/iplayer/episode..._Perfect_Baby/
DEBUG: app : a1414/e3?as=adobe-hmac-sha256&av=1&te=connect&mp=iplayerstream/secure_auth/480kbps/MP/b00tyr8w_1320405462.mp4,prod_3gp_mpeg4_med/iplayerstream/prod_3gp_mpeg4_med/wifi_CBeebies_Bedtime_Stories_Episode_179_b00tyr8w _1320405462.mp4,iplayerstream/secure_auth/1500kbps/MP/b00tyr8w_1320405154.mp4,iplayerstream/secure_auth/400kbps/b00tyr8w_1320405462.mp4,iplayerstream/secure_auth/800kbps/MP/b00tyr8w_1320405470.mp4,iplayerstream/secure_auth/100kbps/b00tyr8w_1320405462.mp4,iplayerstream/secure_auth/480kbps/MP/b00tyr8w_1320405462.mp4,iplayerstream/secure_auth/1500kbps/MP/b00tyr8w_1320405154.mp4,iplayerstream/secure_auth/800kbps/MP/b00tyr8w_1320405470.mp4&et=1320449266&fmta-token=cfbab6649ad53ebf96a89308615c66c7849520b86a9a c12c2c25d49dcfcad134
DEBUG: live : yes
DEBUG: timeout : 30 sec
DEBUG: Setting buffer time to: 36000000ms
Connecting ...
DEBUG: RTMP_Connect1, ... connected, handshaking
DEBUG: HandShake: Type Answer : 03
DEBUG: HandShake: Server Uptime : 189404762
DEBUG: HandShake: FMS Version : 4.0.3.1
DEBUG: HandShake: Handshaking finished....
DEBUG: RTMP_Connect1, handshaked

This is moronic. You should have been using a URL argument from the very beginning: -r rtmp://blahblahblah instead of the separate --host, --port, and --protocol options. Then it's all already there in a single option. Why do you guys use these obsolete options? I think it's time to delete them from the codebase, they cause more problems than they're worth.

Whatever you're using to generate this stream info needs to be smarter too. You don't need multiple copies of "iplayerstream/secure_auth/480kbps/MP/b00tyr8w_1320405462.mp4" in the URL. Just pick the single string for the bitrate you wanted to play and drop the others.