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Live Streaming for capture cards

 
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PostPosted: Thu Mar 23, 2006 1:51 am    Post subject: Live Streaming for capture cards Reply with quote

Hello,

I'm working on a live stream for a little event at my university. I'm thinking about using VideoLAN as source and server, or, more likely, to use VideoLAN as Ice and Icecast2 as streaming server...

I want to handle 3 (analog) video-streams, in 320x240, 25 fsp, 512 kpbs, so an average DSL-Connection (Germany) will do for watching at least one stream at a time.

Because it's a one-night-event, I do not intent to spend money on capturing-hardware working under linux, so I'm stuck with Windows at least for the Ices-Part.

Testing parts of the setup, I came across some questions (which I partly also asked in the VideoLAN Forum):

- Is it likely that Theora-encoding (of ONE stream) takes 85% of CPU-Power on an Athlon 2,4 Ghz Machine or is something wrong with VLC (MP4 takes about 30% CPU, Video-Settings as above)? If so, that makes one CPU per Stream, so I have to borrow another PC...

- Are there alternative (Theora)Ices to use with DirectShow under Windows?

- Will an 1,4 Ghz Athlon/512 Ram do as IceCast-Server for about 100 Viewers? (Bandwich is NO problem)

- Do IceCast2 and the Cortado-Java-Applet work well together?

Thanks for your help
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karlH
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Joined: 13 Jun 2005
Posts: 5476
Location: UK

PostPosted: Thu Mar 23, 2006 5:17 pm    Post subject: Reply with quote

The main theora code has not benn optimized to any great extent so the encoder performance is not that great, however there is a theora-mmx branch which may reduce the usage but whether it's enough for you I don't know.
The DirectShow codecs include theora.
Icecast has little CPU/RAM overhead so the athlon will be plenty.
AFAIK the java applet will work fine, although I haven't tried myself.

karl.
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