A question about pushing/pulling images from a Server to a PDA

  • Thread starter Thread starter Karthik Vazhkudai
  • Start date Start date
K

Karthik Vazhkudai

Hi All:

I have to develop an application whereby a motion-surveillance system
on the server side detects an alarm and somehow delivers the images of
the alarm to a PDA user. The PDA user(who is within a wireless LAN)
can then clear or archive the alarm. I was thinking about 2 approaches
to solve this problem: first one is for the server (on detecting new
alarms) to email the images (as a motion jpeg) to the PDA user. He can
then open this email on his PDA and take appropriate action; Second
approach is to have a client application on the PDA which pings the
server (say every 5 seconds) for any new alarms. Once an alarm is
found the motion jpeg movie is downloaded and displayed in this client
app (on the PDA).

Being inexperienced I am unable to evaluate the pros and cons of each
approach. Can someone throw some light on this or even better, suggest
a superior approach?

Also how would I push any data (in this case a motion jpeg) on to a
PDA? I would appreciate if one can let me know of the appropriate API
calls!

P.S: I am trying to develop this using .NET CF alone.

Much appreciated,
Karthik
 
to solve this problem: first one is for the server (on detecting new
alarms) to email the images (as a motion jpeg) to the PDA user. He can
Click to expand...

Remember that attachments to email gets MIME encoded, which adds 20-25% to
their size..
Second approach is to have a client application on the PDA which pings the
server (say every 5 seconds) for any new alarms. Once an alarm is
Click to expand...

I'm doing something very simular to this with a webservice-like concept and
it works very well..

Cheers,
Lars
 
Lars Black said:
Remember that attachments to email gets MIME encoded, which adds 20-25% to
their size..


I'm doing something very simular to this with a webservice-like concept and
it works very well..

Cheers,
Lars
Click to expand...

Hi Lars:

Thanks a lot for your reply. Since I want to display the downloaded
mpeg stream within my PDA client, I was wondering if there is a way to
do it. based on what I read I think CF cannot display a media control
window within my client app. Is this true and if so are there any
alternative approaches in accomplishing this?

Thanks,
karthik
 
Back
Top