Record multiple videos from a live web cam stream

[gaurav]

Hi,

I have to record a web cam stream (done from Flash). I know this can be done using the module provided to record the stream. But my requirement is to record multiple videos from this stream, which will start and stop at different times. I have also used LiveStreamRecord module some time ago, can I use that module ?

Thanks,
Gaurav

[rrlanham]

Yes, that will work for that.

Richard

[deemunk]

How do you stitch two video recordings (two streams from a video chat) to a single downloadable video(flv) file? Basically I have a video chat application that records two user streams. I need to be able to provide the chat session as a single downloadable video. What is the best way to do this? I can't seems to find any straightforward answer for this. Any pointers would be helpful.

[rrlanham]

There isn't any good way to do that, not that i know of anyway.

Richard

[gabole29]

hello
i'm doing the same thing and video merging is of course not working if you want to record a "full duplex" chat. only halfduplex would work. you need to provide a player that will play both videos (video syncing works with html5 also by the way http://html5demos.com/two-videos). i'm using this option when recording 2 ways half duplex session and then append recording or merge with ffmpeg

one solution even if its not the best but that would allow you to do what you want is to record the screen thought any screencapture app (there are some librairies in java to do this -> http://www.smaxe.com/juvclient.jsf, unfortunately the one i know is using screenvideo 1 codec, and you cannot do much with the resulting file, even flash media encorder. i havent tryed with wowza 3 thought, but with wowza2 it was impossible to do something else than playing the recorded screen streams).

and then you record the audio in a separate stream that will be played synced with the video that will show the selected part of screen during recording. this option is quite heavy for bandwidth and can be tricky to set up but it works

i have a different problem with multiple sources recording: i need to record several streams during a full duplex session. but all streams wont start and end at the same time. is there a way to store the start time in metadata or else and then use these datas to sync the video when playing back ? or should the start time be stored in a db when user gets live and start publishing/recording ?

thank you for your help

[gabole29]

just a thought: time function from within flash client will return client time, so the metadata should be injected server side, right ?

[gabole29]

i have a weird issue with recording. With wowza 3.0.2 b866: recording works fine when using my dev server locally, but on my production server, it creates a 1Ko flv file and that's it. i don't have error messages, here is a log snippet:

2011-12-22 01:47:03 CET connect-pending session INFO 100 122.155.37.11 - _defaultVHost_ videorecording 1412 0.601 [any] 1935 rtmp://myserver.net:1935/videorecording/1412 122.155.37.11 rtmp http://www.mysite.com/visiohtml5/vis...oomName=mysite WIN 11,1,102,55 1070943807 3541 3073 - - - - - - - - - - - - -rtmp://myserver.net:1935/videorecording/1412 -
2011-12-22 01:47:03 CET connect session INFO 200 122.155.37.11 - _defaultVHost_ videorecording 1412 0.602 [any] 1935 rtmp://myserver.net:1935/videorecording/1412 122.155.37.11 rtmp http://www.mysite.com/visiohtml5/vis...oomName=mysite WIN 11,1,102,55 1070943807 3541 3073 - - - - - - - - - - - - - rtmp://myserver.net:1935/videorecording/1412 -
2011-12-22 01:47:03 CET create stream INFO 200 - - _defaultVHost_ videorecording 1412 0.001 [any] 1935 rtmp://myserver.net:1935/videorecording/1412 122.155.37.11 rtmp http://www.mysite.com/visiohtml5/vis...oomName=mysite WIN 11,1,102,55 1070943807 3613 3413 1 - 0 0 - - - - 0 0.0 rtmp://myserver.net:1935/videorecording/1412 rtmp://myserver.net:1935/videorecording/1412 - rtmp://myserver.net:1935/videorecording/1412 -
2011-12-22 01:47:03 CET publish stream INFO 200 1070943807 - _defaultVHost_ videorecording 1412 0.462 [any] 1935 rtmp://myserver.net:1935/videorecording/1412 122.155.37.11 rtmp http://www.mysite.com/visiohtml5/vis...oomName=mysite WIN 11,1,102,55 1070943807 3730 3455 1 - 53 0 1070943807 - - - 0 0.0 rtmp://myserver.net:1935/videorecording/1412/1070943807 rtmp://myserver.net:1935/videorecording/1412/1070943807 - rtmp://myserver.net:1935/videorecording/1412 -
2011-12-22 01:47:04 CET comment server INFO 200 - ModuleStreamRecord.startRecording: stream:1070943807 format:flv append:true outputPath:/usr/local/apache/sites/mysite.com/htdocs/recordings/1/1066/1070943807.flv versionFile:true startOnKeyFrame:false recordData:true - - - 1653.077 - -- - - - - - - - - - - - - - - - - - - - - - -

any clue ?

thanks !

[rrlanham]

Try it without setting outputPath.

Richard

[gabole29]

Hi Richard and thanks for your reply

i had the same result with no path...i traced my netstream client side, and the buffer appears to be empty, thing which is not happening when testing locally. I believe the problem comes from here, but why would this buffer stay empty ?

thanks

[gabole29]

i changed my mic/cam reference in my app and now the recording is ok in the default path, but still 1Ko file in a custom dir.