Andrey Filippov wrote:
On Tue, Feb 2, 2010 at 1:10 PM, Scott Janz <[email protected]
<mailto:[email protected]>> wrote:
Software version 8.0.4.3
I don't need to turn off the compressor, I just need a reliable
way of checking it to make sure it hasn't crashed and then if it
has crashed, to restart it. The event I described was just such an
event, I was running the camera and checking elphel_get_state()
periodically and it was always returning "8". But when I checked
the images that I store to the hard drive using snapfull.php, they
were garbage because the compressor had stopped.
Scott,
The easiest way to check that everything is running OK is to read
status XML file from imgsrv:
http://<camera_ip>:8081/meta
It reads data from the circular output buffer, so if the frame number
increments - everything should be running OK.
There are also ways how to check the same from withing php script in
the camera, but imgsrv method seems to be the most independent of the
other functions of the camera
Thanks for that suggestion, that should work fine.
Why do you use snapfull.php - do you have different resolution video
being streamed or recorded simultaneously? The purpose of that program
is to interrupt video fro as little as possible to acquire different
(usually maximal) resolution images. If you just need to record images
you may use either camogm (to record video/images to the HDD/SSD
attached to the camera) or imgsrv if you transfer images over the
network, i.e.
http://<camera_ip>:8081/bimg
or
http://<camera_ip>:8081/img
"bimg" is preferrable if the network speed is limited and there is
arisc that 19MB video buffer may be overrun while image is being
transferred to the host - it will first save it in the camera, "img"
trasfers directly from the 19MB circular buffer and so allows higher
frame rate.
Andrey
Let me describe our application. The camera is housed in an enclosure
along with other instruments that will be flying onboard the NASA Global
Hawk in March-April of this year. The instrument must operate
autonomously as we will not always have a data link available.
Currently I plan to stream the video at low resolution to a data
recorder on the aircraft (or to the ground if we have a link) and
capture full resolution images to the camera HD once every 10 seconds. I
do this using phpshell.php to launch a local instance of wget
http://localhost/snapfull.php If there is a "hiccup" and the camera
crashes, I need to program an automatic reset into the computer which is
controlling it (I am using Labview to send the http GET queries to the
camera)
thanks,
-scott
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