[Elphel-support] Fwd: GPS data log bug - 353E

[Alexandre Poltorak]

Hi Phil,

First of all as Andrey told, camera CPU resources are limited. If recording
MOV files with 90% quality worked usually for you, let's continue this way
and extract GPS and Compass data in post-production.

Using GEO option in camogmgui make camogm create many files. But IMHO what
take more CPU time is refreshing the list of files in camogmgui. (we should
probably make it refresh on demand only).

If you want you can play a bit with camogm options and see with what
parameters it fit in to the 10353 IDE/SATA bandwidth. (also running on the
small 200 MHz CPU) The bandwidth available for on-disk recording should be
~18MB/s.

Now what could be done without CPU overkill:
- use the recorded MOV files to extract GPS and Compass data and generate
custom KML / KMZ / or whatever files
- make it in realtime from http://192.168.0.9:8081/meta , by refreshing this
URL you will get all EXIF data from last frame. You can write a parser to
generate anything from this info.

Best regards,
Alexandre




On Mon, Apr 19, 2010 at 9:22 PM, Phil <phil at ergovideo.com> wrote:

>
> Hi Andrey
>
> Im using the camogmgui from Sebastian together with the normal Camera
> Control Interface from you. recording mov at 90% 24fps 2352x944 (just grew
> from the old 333 2000x800 x 24fps). I have a compass in the camera would the
> direction data also be recorded into the mov exif? Alex mentioned that he
> knew how to get the data out of the exif for the garmin data but it seemed
> so easy to just have it pump out a extra frame every few seconds via the
> recorder & then upload them to be viewed on line in GEarth or open steetmap
> etc.
>
> i used the meta data php tip you sent to make sure the GPS had been
> detected cheers for that!
>
>   I had been thinking to have a way to use our data outside of the software
> & the images linked with some grade data & perhaps some other interesting
> things to cyclists. The kml generator seems like a great idea, but perhaps
> its too much?
>
>
>
> On Mon, Apr 19, 2010 at 8:24 PM, Andrey Filippov <andrey at elphel.com>wrote:
>
>> Phil,
>>
>> How exactly are you recording video - what software, what file format,
>> resolution, frame rate.
>> What firmware version do you have?
>> Where do you enable KML - it is not needed, the best is just to use *.mov
>> format - lowest CPU overhead (and if the GPS is connected the data will be
>> recorded).
>>
>> Andrey
>>
>
>
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://support.elphel.com/pipermail/support-list_support.elphel.com/attachments/20100419/d4d87ae7/attachment-0002.html>