[Elphel-support] Rebroadcast the live streaming?

[Andrey Filippov]

Esteban,

If you have multiple cameras running in multicast mode in the same network,
you can easily exceed the bandwidth. there is another solution - access
camera from one program in unicast mode and retransmit two copies - one for
analysis, another for Internet streaming.

Andrey

On Tue, May 18, 2010 at 1:23 PM, Esteban Correa-Agudelo <
esteban at sirius.utp.edu.co> wrote:

> Hi, thanks for the fast response
>
> I wanna be more especific. I tested your command with vlc and it works :),
> but my problem is a little different. let me describe the situation.
> I have a computer vision system with algorithm that make image processing
> in the video for traffic analysis. These videos are got it from multiples
> elphel 353 cameras over the street with the help of avld software and
> mencoder. Right now, I need to re-stream all cam videos to internet and  I
> have a unique IP, so I thought "Why not use a vlc to reestream the stream
> while the algorithm is using the mencoder?" but when I use vlc, it stops the
> mencoder and obviusly my algorithm stops too. So, I think that is a
> multicast problem. I enabled it in the parameter editor and I try to access
> to the IP 232.X.Y.Z but it doesn't work yet...
>
> That is why I cant reeconde multiple elphel camera at time in a PC. Because
> one rtsp to a camera stops the others.
>
> Best Regards
>
> 2010/5/18 Alexandre Poltorak <alexandre at elphel.com>
>
>> Hi Esteban,
>>
>>
>> As Andrey wrote VideoAPI was designed for 333 camera and is not available
>> on 353 series.
>>
>> By default 8.0.* firmware stream in unicast, so if your cameras just have
>> unique IP it's OK. You can receive several streams to one PC for transcoding
>> and restreaming. You can also switch the streamer to multicast mode. (in
>> parameters editor) in this case you will also have to setup unique IP and
>> multicast addresses.
>>
>> In both cases the stream is accessible on rtsp://camera_IP:554
>>
>> To transcode & restream you can use VLC, for example :
>> vlc rtsp://192.168.0.9:554 --sout
>> '#transcode{vcodec=theo,vb=3600,scale=0.5,fps=10}:duplicate{dst=std{access=http,mux=ogg,dst=0.0.0.0:8080
>> }}'
>>
>> This command open the camera stream (unicast or multicast), resize it
>> *0.5, limit FPS to 10, Video Bitrate to 3600, re-encode the stream in theora
>> and stream it on all interfaces on the port 8080.
>>
>> To open this encoded stream on a client PC (may be over internet) you just
>> need to open with vlc http://vlc_server_ip:8080
>>
>> You can also use GStreamer framework to reencode & restream.
>>
>> Best regards,
>> Alexandre Poltorak
>>
>>
>> On Tue, May 18, 2010 at 5:41 PM, Esteban Correa-Agudelo <
>> esteban at sirius.utp.edu.co> wrote:
>>
>>> Hi,
>>>
>>> I have more than one elphel camera inside a lan. I would like to stream
>>> all cameras to internet using this guide in section RTP:
>>> http://wiki.elphel.com/index.php?title=Using_Mplayer_With_Video_API
>>>
>>> but i can't find the sdp-file in http://192.168.0.9/mjpg/media.sdp
>>>
>>> where is it???
>>>
>>> best regards
>>>
>>> --
>>> Esteban M. Correa Agudelo
>>> Laboratorio Sirius HPC
>>> Universidad Tecnológica de Pereira
>>>
>>> _______________________________________________
>>> Support-list mailing list
>>> Support-list at support.elphel.com
>>>
>>> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>>>
>>>
>>
>
>
> --
> Esteban M. Correa Agudelo
> Laboratorio Sirius HPC
> Universidad Tecnológica de Pereira
>
> _______________________________________________
> 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/20100518/0e896341/attachment-0002.html>