[AWS] AWS.Client

[Adrian Hoe 贺文耀]

Hi,

I am exploring a viability of developing a Mac software retrieving  
JPEG (motion) images from a video server using AWS.

So far, I am able to connect to the video server and to issue simple  
control commands to the video server with AWS.Client.Create and  
AWS.Client.Get.

I am ready to step into the second phase of exploration which is more  
difficult and most important part of the entire project. To retrieve  
JPEG images from the server.

To retrieve the JPEG images from the server using a web browser:

      http://xyz.com:20000/nphMotionJpeg? 
Resolution=320x240&Quality=Standard

The server will send (push) continuous frames of JPEG still images to  
the browser giving the motion effects.

According to doc, I can use Read_Some or Read to receive the JPEG  
frames with connection created with Server_Push => True.

In the comment of Read_Some, it says.... Returns Last < Data'First.  
While in the comment of Read, it says...  Returns Last < Data'Last. I  
supposed it should be "Returns Last < Data'Last". Am I right?

I am not familiar with server push and AJAX stuff. My concern is, how  
do I know if Read/Read_Some has received one full JPEG frame or more?  
Or does Read/Read_Some work in the way that it will receive one frame  
(of one JPEG image) after another of different size? JPEG images of  
320x240 do not have the same file size(due to encoding and  
compression?).

Has anyone had any experience in this area? Can you share your  
experience?

Thanks and best regards,
--
"If you missed the rising sun and the morning dew, don't miss the  
beautiful sunset." -- Adrian Hoe inspired by Michal Nowak, June 15 2004
http://adrianhoe.com
http://adrianhoe.net


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