[Icecast] VGA Capture

Carl Karsten carl at personnelware.com
Fri Mar 17 02:56:02 UTC 2006


First the disclaimer: I am new at this, and so I may not have 100% understanding 
of terms like svhs or composite.

That said, You are close, but svhs or composite isn't 1024x768 - it is 640x480 
or whatever this chart says: http://www.geocities.com/cplarosa/video/vidres.htm

I am not targeting any TV display - my target is other computers running 
win/mac/linux/whatever that can decompress streaming video and display it on a 
full blown monitor.  (I haven't figured out how much bandwidth someone will need 
for this.)



adam wrote:
> i am a bit confused to what you want...do you mean you want a scan converter?
> you can plug a vga out of the laptops to the scan converter, take another vga from the scan converter to a projector, and a svhs or composite out from the scan 
> converter to the encoding machine
> you can buy them for about 200 USD or less
> or do i misunderstand your question?
> adam
> ..on Thu, Mar 16, 2006 at 03:44:44PM -0600, Carl Karsten wrote:
>> Hey lists,
>> This is somewhat OT, but just a little.
>> I want to capture live (5 fps?) 1024x768 VGA and make mpeg or something I 
>> can stream over the net.
>> The application is this:  Developer meetings and conferences.  "all" 
>> speakers bring their laptops and hook up to the 1024x768 projector.  I want 
>> to broadcast that over the net.  (I may point a web cam at the presenter 
>> too and have that as a 2nd feed.)  I do not want to load anything on their 
>> laptop.  I 'know' it is easy, cheaper, and better in some ways, and it may 
>> even happen in some instances, but for the most part, I never want to even 
>> ask a speaker to do it. There just isn't enough time to to make sure it 
>> works, etc.  A hardware based solution is much more ... good.
>> The plan is to have a laptop or small PC sitting under the projector that 
>> somehow gets the same VGA as the projector.  Some projectors have a VGA 
>> out, not sure how standard that is.  I can deal with an external device 
>> that uses USB or Ethernet, or a pci/pcmica card in the box that will do the 
>> encoding.
>> I found this: https://ssl.epiphan.com/order/order.php?pid=1 - that will do 
>> what I need, but $400 is a bit much (I need about 5 or 10 for conferences 
>> that have multiple sessions going at the same time.)  I am kinda doing this 
>> on my own - the first step is to get one for the local user group meeting I 
>> attend.  If that works out, then I may get some more and loan/rent them 
>> out.  Thus the desire to find a cheaper solution.
>> I found things relating to KVM over IP, can't figure out if these will 
>> allow me to capture/stream.
>> http://www.zantech.com.au/peppercon/eric-express/  $100
>> aten CN-6000
>> http://www.aten.com/products/productItem.php?pcid=20050103163647001&psid=20050107105033001&pid=20050224141359008
>> $400
>> http://okvm.sourceforge.net/kvmoverip.html - pretty sure that requires a 
>> pci card in the box generating the video (so no good.)
>> Thanks for taking the time to read this - any pointers welcome.
>> Carl K
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