[Elphel-support] Using my local timezone? not UTC

[Andrey Filippov]

Nathan,

The local time here (in Utah) is also not UTC, but decided to stay with UTC.
You see - there is no standard way in Exif to tell the time zone (
http://www.google.com/search?exif+time+zone ) , sometimes it can be done -
if the GPS data is available by comparing Exif time with GPS time (also
included in Exif).

So we decided to use the UTC as the camera system time, and this time is
used in the images.

If you really want to change that, there are two ways:

1. Modify the camera driver so it will add/subract certain number of
seconds:

http://elphel.cvs.sourceforge.net/viewvc/elphel/elphel353-8.0/os/linux-2.6-tag--devboard-R2_10-4/arch/cris/arch-v32/drivers/elphel/sensor_common.c?view=markup
432  char * exif_meta_time_string=encode_time(ccam_dma_buf_ptr[index_time],
ccam_dma_buf_ptr[index_time+1]);

First parameter of the encode_time() accepts number of second since epoch,
second - number of additional microseconds. So you can just add the number
to the first parameter (and then rebuild the project)

2. Use the "Windows way" (as opposed to Unix/Linux one) of the system time -
set it to the local, not top the UTC.
You can modify the startup script that sets time from the NTP server over
the Internet - it is here (sorry, not the really appropriate place):

http://elphel.cvs.sourceforge.net/viewvc/elphel/elphel353-8.0/modules/usb/iop/cris-2.6-R1_05/rc?view=markup

In the camera file system it is in /etc/init.d/usb - you can edit it right
there.

Andrey


On Tue, May 31, 2011 at 6:47 AM, Nathan Clark <throwstone at gmail.com> wrote:

> Hi guys,
>
> I've been pulling my hair out, wondering why I cannot get the camera system
> time synchronized with my Ubuntu 10.04 PC...
>
> Then I realized... it's 22:44 here in GMT +10
> and the System Clock is 12:47 UTC (which is actually very close to
> accurate)
>
> But is there any way to have the camera clock synchronized to my timezone,
> so that images contain an accurate timestamp for my part of the world?
>
>
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
>
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