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Old 07-22-2013, 03:06 PM
mehphishtopheles mehphishtopheles is offline
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"Ghost time" issue with live webcast generated rtmp dumps


I have been trying to rip live streaming webcast concert videos occasionally offered by a band I like. rtmpdump will run, but there are playback issues with the output files. First, here is what the server is sending me:

RTMP Proxy Server
(c) 2010 Andrej Stepanchuk, Howard Chu; license: GPL

Streaming on rtmp://0.0.0.0:1935
Processing connect
app : live/
flashVer : WIN 10,3,183,90
swfUrl : http://static.nugs.net/swf/player3.swf
tcUrl : rtmpe://cp127157.live.edgefcs.net/live/
pageUrl : http://www.livephish.com
WARNING: HandShake: Type mismatch: client sent 6, server answered 9
live : yes
Playpath : nugs_ph3130719@s87528?auth=[my auth code, removed to protect identity]
Saving as : nugs_ph3130719@s87528
INFO: Metadata:
INFO: startDate 19-07-2013
INFO: startTime 15:48:21:00
INFO: title
INFO: author
INFO: description
INFO: keywords
INFO: rating
INFO: copyright
INFO: sourcetype KulaByte Encoder 3.2 rev6949
INFO: presetname ph130719.kpf
INFO: creationdate
INFO: videodevice
INFO: videocodecid avc1
INFO: framerate 29.97
INFO: width 848.00
INFO: height 480.00
INFO: videodatarate 1200.00
INFO: avcprofile 77.00
INFO: avclevel 31.00
INFO: videokeyframe_frequency0.00
INFO: audiodevice
INFO: audiocodecid aac
INFO: audiosamplerate 48000.00
INFO: audiochannels 2.00
INFO: audiodatarate 128.00
INFO: audioinputvolume 0.00
WARNING: ignoring too small audio packet: size: 0


Here's what seems to be the issue: The webcast might start at let's say 8pm. The link to connect doesn't go live for a few mins and I am first able to connect at 8:05pm. The output files seem to think there is an extra 5 mins of video (hence my subject line of "ghost video") because the server is giving a static start time that is different from the actual time the video rip begins.

It causes all sorts of weird anomalies with various players/editors. Everything from not being playable, to being way out of sync, frozen image but working audio, etc.

I have tried using tools to fix this. FLVMDI, Replay Media Catcher's Fix FLV utility, and GetFLV's fix flv feature. I have yet to find a solution.

Can anyone help? Thank you in advance!

PS: I can upload an example .flv file upon request if that would be helpful.

PSS: I am using rtmpdumphelper in order to generate the command parameters.
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