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I need to capture a video stream from a web cam and then show it non-stop with a delay of 30 seconds or more.

A server side linux software would be the best but a Windows GUI application will be ok as well.

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simultaneously capture and stream? – Travis Dtfsu Crum Oct 20 '12 at 0:40
@TravisDtfsuCrum I think he means to capture the footage, wait several seconds (30, 60, etc...) and then play it. I'm not sure if that counts as simultaneous or not. To OP: Could you elaborate a bit on the question? What is the final goal of this? What sort of stream is it (wmv, asf, mms, etc...)? – Bart Arondson Oct 21 '12 at 22:51
to me it sounds like he wants to restream something essentially – Travis Dtfsu Crum Oct 22 '12 at 1:11
Yes you right. I want to capture and replay. It's stays in some buffer. Immediately after X seconds you can see it on some projector/display. I don't care about formats(any mp4, wmv asf, raw data in memory or on disk drive). I need cheap/reliable solution. As less programming as possible since I believe VLC and FFMpeg can do it somehow. – Boris Ivanov Oct 22 '12 at 9:32
What is the source? Is it an online stream? Could you provide a link? Why don't you just use the original stream on the display? All this info would help to find a solution and make the question more helpsful to others as well. – Bart Arondson Oct 22 '12 at 15:09
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1 Answer

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+50

What you are looking for is called a Broadcast Delay Processor. Unfortunately these comes as a hardware modules you feed your signal through, and therefor can be relative expensive.

I did look around for a software based broadcast delay for you, but was not able to find any.

Luckily though, you can use VLC (free and available on Linux and Windows) to stream with a delay. Check out this command:

Display stream output

  --sout-display-delay=<integer [-2147483648 .. 2147483647]>
                             Delay (ms)
      Introduces a delay in the display of the stream.

In your case use it like with this value: --sout-display-delay=30000

You can also record your webcam with VLC, see this article for details:
Recording webcam videos with VLC Media Player

In other words, using VLC with the provided commands you should be able to both record your webcam and stream it with a delay (at no cost).

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