[Elphel-support] Some questions about Elphel 353

[Alexandre Poltorak]

Hi Jens,

Concerning gstreamer support check my blog post on using gstreamer with
Elphel cameras:
http://blogs.elphel.com/2009/11/interfacing-elphel-cameras-with-gstreamer-opencv-opengl-and-python-get-profit-of-dsp-or-gpu-based-optimisation-control-camera-settings-from-python-application-or-human-interface-device-hid/

It show also how to manage the latency. Internal latency from sensor to
network is < 2 frames.

astreamer is the streamer on the camera, yes.

to download RAW image you can use this script :
http://elphel.cvs.sourceforge.net/viewvc/elphel/elphel353-8.0/packages/web/353/php_top/raw.php?revision=1.2&view=markup

Best regards,
Alexandre

On Mon, Jun 14, 2010 at 7:47 AM, Jens Bürger <jens.buerger at cs.tu-dortmund.de
> wrote:

> Hi,
>
> our student group is constantly discovering the various areas of code and
> structure of the cam, so we  come to additional questions from time to time.
>
> At the moment, we have the following ones:
>
> What is the difference between the elphel_wait_frame_abs and
> elphel_wait_frame functions?
> As I unterstood it, elphel_wait_frame 'syncs' to completed, compressed
> images, but to what does the _abs-function 'sync'? I think I read somewhere
> that it 'syncs' to 'all' images. Does this mean, that uncompressed
> image-data is also available via the Linux-System? If yes: where are they
> available and how / when do they bypass compressor.v ?
>
> Where is the RTSP-Streaming-Server implemented?
> This is /apps/astreamer, right?
>
> Do we have to enable the gstreamer-support somewhere? We did try to connect
> to the cam via gstreamer, but gstreamer did receive no data.
>
> What does /dev/jpeghead do? It looks like it does some sort of finishing
> the JPEG-Compression?
>
> What sets the timedelay in the RTSP-Stream? Running some tests, we felt
> that the delay is actual some seconds.
>
> We are interested in the PHP Constants, as listed in
> http://wiki.elphel.com/index.php?title=Elphel_PHP_constants
> Where can we find documentation of the meaning / effect of the various
> constants?
>
> Thank you in advance,
> Jens Bürger
> _______________________________________________
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> Support-list at support.elphel.com
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>
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