[Elphel-support] questions about 353 camera

[Schuster, Sebastian]

Hi Sebastian,
thank you for your answer.

Low latency is also important for us, thanks for the tip.

I have experienced, that my camera has a very low frame rate ~3 frames in default configuration (using the Camera Control Interface video image and VLC). Decreasing the resolution did not increased the frame rate very much, maybe just about to 5 frames.

I also tried different kinds of connections, a point to point connection via cross over cable and one using a switch. Both with the same slow result.

What can be done to increase the frame rate?

Regards,
Sebastian





-----Ursprüngliche Nachricht-----
Von: Sebastian Pichelhofer [mailto:sebastian.pichelhofer at gmail.com]
Gesendet: Donnerstag, 9. September 2010 18:41
An: Schuster, Sebastian
Cc: support-list at support.elphel.com
Betreff: Re: [Elphel-support] questions about 353 camera


Ah and there is also the option to change the default (boot-time)
parameters using the Parameter Editor.

Regards Sebastian

On Thu, Sep 9, 2010 at 18:29, Sebastian Pichelhofer
<sebastian.pichelhofer at gmail.com> wrote:
> On Thu, Sep 9, 2010 at 17:13, Schuster, Sebastian
> <Sebastian.Schuster at kmweg.de> wrote:
>> Hello,
>>
>> I have some question about my 353 camera:
>>
>> My first question is about the Camera Control Interface. When I change the
>> settings for the resolution, can I save them on the camera or do I have to
>> change them everytime when the camera is powered up?
>
> They are reset to default values at boot time.
>
> You can add a startup script that sets the desired parameters on boot
> time though.
>
>>
>> Second one:
>> Using the command line, e.g. vlc rtsp://192.168.0.9:554 -V x11, is there a
>> list of commands I can use? Are these commands related to the VLC plaver or
>> to the camera or both?
>
> Not related to the camera. Best check the VLC manual or website for a
> list of possible commands.
>
> One that is very important for low latency streaming from Elphel
> cameras is --rtsp-caching (integer)
>
>    Sets the default caching (buffering) value for RTSP streams, in
> milliseconds.
>
> If I remember correctly the default value is around 5000 (5 seconds).
> Depending on resolution/framerate/compression settings of the camera
> you can go down to as low as 10-20 which basically gives realtime
> video (lower latency than what we achieved with any other player like
> mplayer or gstreamer)
>
> Regards Sebastian
>
>>
>> Regards,
>> Sebastian
>>
>>
>> Krauss-Maffei Wegmann GmbH & Co. KG
>> Sitz der Gesellschaft ist München
>> Registergericht: Amtsgericht München, HRA 72 460
>>
>> Persönlich haftende Gesellschafterin: Krauss-Maffei Wegmann Verwaltungs GmbH
>> Sitz der Gesellschaft ist München
>> Registergericht: Amtsgericht München, HRB 118952
>> Geschäftsführer: Dipl.-Ing. Frank Haun (Vorsitzender), Dipl.-Kfm. Stefan
>> Krischik, Dipl.-Ing. Jürgen Weber
>> Vorsitzender des Aufsichtsrates: Johannes Schmidt
>>
>>
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>>
>>
>


Krauss-Maffei Wegmann GmbH & Co. KG
Sitz der Gesellschaft ist München
Registergericht: Amtsgericht München, HRA 72 460

Persönlich haftende Gesellschafterin: Krauss-Maffei Wegmann Verwaltungs GmbH 
Sitz der Gesellschaft ist München 
Registergericht: Amtsgericht München, HRB 118952
Geschäftsführer: Dipl.-Ing. Frank Haun (Vorsitzender), Dipl.-Kfm. Stefan Krischik, Dipl.-Ing. Jürgen Weber
Vorsitzender des Aufsichtsrates: Johannes Schmidt