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List:       helix-open-discuss
Subject:    Re: [Open-discuss] per client watermarking
From:       Jeff Ayars <jeffa () real ! com>
Date:       2005-07-11 4:29:21
Message-ID: 6.2.1.2.2.20050710212224.029a9d78 () mailone ! real ! com
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You can do this via SMIL.  Probably easiest to do something like this:

Using SMIL layout, place the 'watermark' over the video region.  Use 
alphablending if you want a cool effect.

Send a Cookie with the SMIL file via HTTP from a web server to identify 
Client A and Client B.

The SMIL file references a PNG (or .rt or .txt) of the 'wartermark' via 
HTTP from the same web server (or at least one in the same domain so the 
cookie sent with the SMIL gets sent back up).  Based on the cookie, the web 
server determines which actual file to return.

You could also do something like automatically generate different SMIL 
files via JSP/PHP/ASP if you want to but cookies are pretty easy and 
delivering a different file based on a cookie lookup is pretty easy too.

SMIL is supported in both open and commercial helix products.

JEff

At 05:52 AM 7/10/2005, Rajkumar S wrote:
>Hi,
>
>Is there any way to watermark (ie put any in/visible text/sign) in the 
>broadcast stream on a per client basis?
>
>ie if client A sees the stream his/her video will have a text A at a 
>static position or moving across the screen, and client B will have text B.
>
>I am looking for this functionality in either the open or commercial helix 
>products. Any other points are also much welcome.
>
>regards,
>
>raj
>
>
>_______________________________________________
>Open-discuss mailing list
>Open-discuss@helixcommunity.org
>http://lists.helixcommunity.org/mailman/listinfo/open-discuss




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