[Elphel-support] change camera parameters through Telnet

[Biel Bestué de Luna]

Andrey
you talked before about the possibility to create a C coded program, how
would someone interact with that program would that be a daemon like the
php application seems to be working? if so would it be any better than php
resource-wise?

if a C coded application could be added in order to cover this rapid
control and data acces, could both applications (php application and C
coded application) coexists using the same parameters? so if you change
EXPOS via wget you see the change right away in the C coded program and
vice versa...
so both applications would cover diferent usages of the camera, one could
cover the current usage, where you can do everythin in camera, and the
other would cover a more service-like usage where the camera serves the
purpose of recording/shooting device, and other functions remain in another
computer not inside the camera. what do you think?


2012/12/14 support-list <support-list at support.elphel.com>

> **
>
> > the idea was to unload that work from the camera, and leave all the
> important processing to the external computer,
> Yes, we do the same with Eyesis, there is a lot of processing, but PHP is
> still used in to control the camera
>
>
> > like Flavio Soares does, he deactivates the php functions of the camera
> so it can record at a higher quality jpeg compression.
> What does "deactivates the php functions of the camera" mean?
>
> He does not use the camera GUI? Yes, that GUI is rather slow, but not
> slower that it was before the PHP was implemented in the camera (camvc is
> rather old - at least 6-7 years).
>
> Using PHP in the camera is the fastest way to control it. Of course, if
> you will run Drupal there - it will be terribly slow, but just changing few
> parameters you really need - it will be faster than telnet.
>
>
> > what would be cool would be to have an abstraction layer that would
> cover that kind of usage of the camera, for rapid interaction with the
> camera.
>
> Camera control functionality is implemented in PHP extension -
> http://wiki.elphel.com/index.php?title=PHP_in_Elphel_cameras . Any simple
> "API" like in many cameras would definitely limit the functionality, so we
> decided that user can make her own API, coding it in PHP. It can be
> universal, but big and likely slow. Or it can be tailored to particular
> application - and be really fast.
>
> Andrey
>
>
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