[Elphel-support] Rebroadcast the live streaming?

Esteban Correa-Agudelo esteban at sirius.utp.edu.co
Thu May 27 10:26:00 PDT 2010 

Hi all!

I have followed every step provided by Andrey Latin, and finally, the
multicast work for a single camera...

But, when I make rtsp from multiples elphel cameras on the same machine, I
have a permutation effect. I mean, I launched first vlc:
$   mplayer -demuxer live555 rtsp://192.168.1.50
in another console I launched the second one:
$ vlc rtsp://192.168.1.51

How we can see in the pic1, pic2, pic3,  media players sometimes permute the
video source between them, and also one video is displayed over the two
media players

so, How can I fix this issue??? because I have multiples cameras and I need
to process every one on the same linux machine, any idea?

thanks in advance for answer this email

br, Esteban


2010/5/27 Andrey Latin <andrey.latin at gmail.com>

> Hi all!
>
> For streaming multicast You'll do next:
> 1. enable multicasting on local linux interface(in my example eth1)
>    ~# route add -net 224.0.0.0 netmask 240.0.0.0 eth1
> and test it
>     ping 224.0.0.1
> (see pic1)
> 2. In WEB interface select "Parameter Editor", select "streamer" and press
>    "View/Edit Current". Then - set STROP_MCAST_EN to 1
>    Press "Apply" and "Restart"
>  (see pic 2)
> 3. Check, what mplayer/mencoder linked with LIVE555
>     mplayer -demuxer help |grep live
>  (see pic 3)
> 4. starting streaming
>    mplayer -demuxer live555 rtsp://192.168.30.9:554
> You shall see stream over multicast on screen(see pic4)
> But multicast address not 232.X.Y.Z - it is 224.X.Y.Z
>
> wbr, Andrey Latin
>
>
> On Wed, May 26, 2010 at 8:48 PM, Esteban Correa-Agudelo <
> esteban at sirius.utp.edu.co> wrote:
>
>> Hi,
>>
>> I set the multicast mode manually, I mean, I have edited the file
>> autocampars.php in line 1446      <STROP_MCAST_EN>0</STROP_MCAST_EN> by
>> <STROP_MCAST_EN>*1*</STROP_MCAST_EN>
>>
>> the camera firmware is *8.0.7* and the mencoder output when I launched
>> vlc first is:
>>
>> leeloocam52 at leeloocam52:~$ *sudo mencoder rtsp://192.168.1.51 -nosound
>> -ovc raw -vf format=bgr24 -of rawvideo -o /dev/video1          *
>>
>> MEncoder SVN-r31059-4.4.1 (C) 2000-2010 MPlayer Team
>> Resolving 192.168.1.51 for AF_INET6...
>> Couldn't resolve name for AF_INET6: 192.168.1.51
>> Connecting to server 192.168.1.51[192.168.1.51]: 554...
>> librtsp: server responds: 'RTSP/1.0 455 Server is busy'
>> rtsp_session: unsupported RTSP server. Server type is 'unknown'.
>> STREAM_LIVE555, URL: rtsp://192.168.1.51
>> success: format: 21  data: 0x0 - 0x0
>> Stream not seekable!
>>  file format detected.
>> Failed to get a SDP description from URL "rtsp://192.168.1.51": cannot
>> handle *DESCRIBE response: RTSP/1.0 455 Server is busy*
>> ============ Sorry, this file format is not recognized/supported
>> =============
>> === If this file is an AVI, ASF or MPEG stream, please contact the author!
>> ===
>> Cannot open demuxer.
>>
>> I would like to know how to access to multicast IP stream if IP camera's
>> is 192.168.1.50 ...
>>
>> best regards
>>
>>
>>
>> 2010/5/26 Alexandre Poltorak <alexandre at elphel.com>
>>
>>> You are in unicast.
>>>
>>> Esteban, I do not know how, but we went out of our mail ling list. Can we
>>> switch back to the ML please?
>>>
>>> Can you post on the mailing list a description of how do you set the
>>> camera in multicast mode, the firmware revision you have and output of
>>> mplayer.
>>>
>>> Thanks.
>>> Alexandre
>>>
>>>
>>>
>>>
>>>  On Wed, May 26, 2010 at 2:46 AM, Esteban Correa-Agudelo <
>>> esteban at sirius.utp.edu.co> wrote:
>>>
>>>> Hi,
>>>>
>>>> I have launched vlc first like you said, and this the output of mencoder
>>>> when it is launched in another console sesion :
>>>>
>>>> leeloocam52 at leeloocam52:~$ *sudo mencoder rtsp://192.168.1.51 -nosound
>>>> -ovc raw -vf format=bgr24 -of rawvideo -o /dev/video1          *
>>>>
>>>> MEncoder SVN-r31059-4.4.1 (C) 2000-2010 MPlayer Team
>>>> Resolving 192.168.1.51 for AF_INET6...
>>>> Couldn't resolve name for AF_INET6: 192.168.1.51
>>>> Connecting to server 192.168.1.51[192.168.1.51]: 554...
>>>> librtsp: server responds: 'RTSP/1.0 455 Server is busy'
>>>> rtsp_session: unsupported RTSP server. Server type is 'unknown'.
>>>> STREAM_LIVE555, URL: rtsp://192.168.1.51
>>>> success: format: 21  data: 0x0 - 0x0
>>>> Stream not seekable!
>>>>  file format detected.
>>>> Failed to get a SDP description from URL "rtsp://192.168.1.51": cannot
>>>> handle *DESCRIBE response: RTSP/1.0 455 Server is busy*
>>>> ============ Sorry, this file format is not recognized/supported
>>>> =============
>>>> === If this file is an AVI, ASF or MPEG stream, please contact the
>>>> author! ===
>>>> Cannot open demuxer.
>>>>
>>>> Exiting...
>>>> leeloocam52 at leeloocam52:~$
>>>>
>>>> This is the output of vlc with -vvv (megavervose) when I launched first
>>>> mencoder
>>>>
>>>> [0xb6f00758] main input debug: `rtsp://192.168.1.51' gives access
>>>> `rtsp' demux `' path `192.168.1.51'
>>>> [0xb6f00758] main input debug: creating demux: access='rtsp' demux=''
>>>> path='192.168.1.51'
>>>> [0x8484ce8] main demux debug: looking for access_demux module: 1
>>>> candidate
>>>> Sending request: OPTIONS rtsp://192.168.1.51 RTSP/1.0
>>>> CSeq: 1
>>>> User-Agent: VLC media player (LIVE555 Streaming Media v2008.07.24)
>>>> Received OPTIONS response: RTSP/1.0 200 OK
>>>> CSeq: 1
>>>> Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE
>>>>
>>>> Sending request: DESCRIBE rtsp://192.168.1.51 RTSP/1.0
>>>> CSeq: 2
>>>> Accept: application/sdp
>>>> User-Agent: VLC media player (LIVE555 Streaming Media v2008.07.24)
>>>>
>>>> *Received DESCRIBE response: RTSP/1.0 455 Server is busy
>>>> CSeq: 2
>>>> *[0x8484ce8]* live555 demux debug: DESCRIBE failed with 455: cannot
>>>> handle DESCRIBE response: RTSP/1.0 455 Server is busy*
>>>> [0x8484ce8] live555 demux debug: connection timeout
>>>> [0x8484ce8] live555 demux error: Failed to connect with rtsp://
>>>> 192.168.1.51
>>>> [0x8484ce8] main demux warning: no access_demux module matching "rtsp"
>>>> could be loaded
>>>> [0x8484ce8] main demux debug: TIMER module_need() : 1565.405 ms - Total
>>>> 1565.405 ms / 1 intvls (Avg 1565.405 ms)
>>>> [0xb6f00758] main input debug: creating access 'rtsp'
>>>> path='192.168.1.51'
>>>> [0xb6f03b10] main access debug: looking for access module: 1 candidate
>>>> [0xb6f03b10] main access debug: net: connecting to 192.168.1.51 port 554
>>>> [0xb6f03b10] main access debug: connection: Operation now in progress
>>>> [0xb6f03b10] main access debug: connection succeeded (socket = 8)
>>>> [0xb6f03b10] access_realrtsp access debug: rtsp connected
>>>> [0xb6f03b10] access_realrtsp access warning: only real/helix rtsp
>>>> servers supported for now
>>>> [0xb6f03b10] main access warning: no access module matching "rtsp" could
>>>> be loaded
>>>> [0xb6f03b10] main access debug: TIMER module_need() : 880.232 ms - Total
>>>> 880.232 ms / 1 intvls (Avg 880.232 ms)
>>>> [0xb6f03b10] main access debug: waitpipe: object killed
>>>> [0xb6f00758] main input error: open of `rtsp://192.168.1.51' failed:
>>>> (null)
>>>> [0xb6f00758] main input error: Your input can't be opened
>>>> [0xb6f00758] main input error: VLC is unable to open the MRL 'rtsp://
>>>> 192.168.1.51'. Check the log for details.
>>>> [0xb6f00758] main input debug: thread ended
>>>> [0x8460b28] main playlist debug: dead input
>>>> [0xb6f030b0] main stream output debug: destroying useless sout
>>>> [0xb6f037f8] main stream out debug: destroying chain... (name=transcode)
>>>> [0x8480fc8] main stream out debug: destroying chain... (name=duplicate)
>>>> [0x8480fc8] stream_out_duplicate stream out debug: closing a duplication
>>>> [0x8482db0] main stream out debug: destroying chain... (name=std)
>>>> [0x8486748] mux_ogg mux: Close
>>>> [0x8486748] main mux debug: removing module "mux_ogg"
>>>> [0x8487d48] main http server debug: waitpipe: object killed
>>>> [0x8487d48] main http server debug: HTTP host removed
>>>> [0x84873f8] main http server debug: no hosts left, stopping httpd
>>>> [0x8485490] access_output_http access out debug: Close
>>>> [0x8485490] main access out debug: removing module "access_output_http"
>>>> [0x8482db0] main stream out debug: removing module "stream_out_standard"
>>>> [0x8482db0] main stream out debug: destroying chain done
>>>> [0x8480fc8] main stream out debug: removing module
>>>> "stream_out_duplicate"
>>>> [0x8480fc8] main stream out debug: destroying chain done
>>>> [0xb6f037f8] main stream out debug: removing module
>>>> "stream_out_transcode"
>>>> [0xb6f037f8] main stream out debug: destroying chain done
>>>> [0xb6f00758] main input debug: TIMER input launching for 'rtsp://
>>>> 192.168.1.51' : 2453.393 ms - Total 2453.393 ms / 1 intvls (Avg
>>>> 2453.393 ms)
>>>> [0x8460b28] main playlist debug: changing item without a request
>>>> (current 0/1)
>>>> [0x8460b28] main playlist debug: nothing to play
>>>>
>>>>
>>>>
>>>> Also, the camera has *multicast enable*...  so, I don't know hot to
>>>> access to a camera at time in one machine???, because a rtsp player blocks
>>>> another rtsp conections with the same camera or the others
>>>>
>>>> Best Regards
>>>>
>>>>
>>>> Esteban
>>>>
>>>>
>>>>
>>>> 2010/5/19 Alexandre Poltorak <alexandre at elphel.com>
>>>>
>>>>> Hi,
>>>>>
>>>>> Your  resolution / FPS / image quality are really small, so it should
>>>>> work.
>>>>>
>>>>> In unicast only one client can connect, others will see "server busy"
>>>>> error. in milticast mode you can read the same stream with multiple clients.
>>>>> You simply run two vlc rtsp://192.168.0.9:554 , it should work.
>>>>>
>>>>> try to first launch VLC with "-vvv" (megaverbose) and than the other
>>>>> player and see what error VLC report.
>>>>>
>>>>> If you design your own software you do not need to use v4l for Elphel.
>>>>> You can use GSTreamer framework for example.
>>>>>
>>>>> They are many ways: live555, libvlc, gstreamer framework, FFMpeg libs,
>>>>> ...
>>>>>
>>>>> Best regards,
>>>>> Alexandre
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>  On Wed, May 19, 2010 at 3:08 PM, Esteban Correa-Agudelo <
>>>>> esteban at sirius.utp.edu.co> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I've tried to answer(*Bold*) to your questions(Purple), please see
>>>>>> below
>>>>>>
>>>>>> thanks again
>>>>>>
>>>>>> --
>>>>>> Esteban M. Correa Agudelo
>>>>>> Laboratorio Sirius HPC
>>>>>> Universidad Tecnológica de Pereira
>>>>>>
>>>>>> 2010/5/19 Alexandre Poltorak <alexandre at elphel.com>
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> In my understanding you do not need multicast mode, but it should
>>>>>>> work in both modes.
>>>>>>>
>>>>>>> What resolution / FPS / image quality do you stream from the camera ?
>>>>>>> *(2560x1920)*1/4 decimation = 640x480
>>>>>>> *
>>>>>>
>>>>>> *    FPS= FP1000slim 30000 or 30 fps
>>>>>> *
>>>>>>
>>>>>>> *image quality = 80% (for image processing)*
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>   On Wed, May 19, 2010 at 12:08 AM, Esteban Correa-Agudelo <
>>>>>>> esteban at sirius.utp.edu.co> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> I have got working with this line
>>>>>>>> *$ vlc rtsp://192.168.1.51:554 --sout \
>>>>>>>> '#transcode{vcodec=theo,vb=1800,scale=0.5}:duplicate{dst=std{access=http,mux=ogg,dst=0.0.0.0:8080
>>>>>>>> }}'*
>>>>>>>>
>>>>>>>> then I run mencoder in the same PC with AVLD:
>>>>>>>> *$ sudo mencoder http://0.0.0.0:8080 -nosound -ovc raw -vf
>>>>>>>> format=bgr24 -of rawvideo -o /dev/video0 *
>>>>>>>>
>>>>>>>>
>>>>>>> You need to open not http://0.0.0.0:8080 , but the IP of the
>>>>>>> computer running VLC.
>>>>>>> * see below*
>>>>>>>
>>>>>>>> and It works. But, If try to transcode another camera at time in the
>>>>>>>> same PC with another vlc... it stops the first one. So I wonder if it is
>>>>>>>> possible to transcode two camera at time in one PC and how would is it?
>>>>>>>>
>>>>>>>
>>>>>>> What is CPU usage with just VLC running and restreaming the camera ?
>>>>>>> What is the CPU usage on the machine running AVLD & Mencoder ?
>>>>>>>
>>>>>>> Does it all run on the same machine ? In this case why restream to
>>>>>>> itself ?
>>>>>>> *Yeah, vlc and Mencoder run on the same machine, VLC restream to
>>>>>>> itself because I dont know how to access to the rtsp camera with mencoder
>>>>>>> and then with vlc at time (it stop the mencoder, depend of which was
>>>>>>> launched first), also if I have two cameras, I launch mencoder
>>>>>>> rtsp://camera1 and then vlc rtsp://camera2 on the same pc, one rtsp player
>>>>>>> stops the another...
>>>>>>> *
>>>>>>>
>>>>>> *   So, I wonder if It is possible to access to multiple rtsp cameras
>>>>>> at time on the same machine and how is it???*
>>>>>>
>>>>>>
>>>>>>>  Also AVLD is a good option if you have to use proprietary software
>>>>>>> that you _can not modify_ and have to use v4l device to use the software.
>>>>>>> Ex: Skype.
>>>>>>>
>>>>>>> If you use a free software and especially if you design one, AVLD is
>>>>>>> not a good option, please do not use it in this case.
>>>>>>> *what do you would recomend? because My software have to use v4l
>>>>>>> device (usb cameras).*
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>  Best regards,
>>>>>>> Alexandre Poltorak
>>>>>>>
>>>>>>>
>>>>>>>>
>>>>>>>> thanks for your time
>>>>>>>>
>>>>>>>> best regards
>>>>>>>>
>>>>>>>> --
>>>>>>>> Esteban M. Correa Agudelo
>>>>>>>> Laboratorio Sirius HPC
>>>>>>>> Universidad Tecnológica de Pereira
>>>>>>>>
>>>>>>>>
>>>>>>>> 2010/5/18 Andrey Filippov <andrey at elphel.com>
>>>>>>>>
>>>>>>>> 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
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Esteban M. Correa Agudelo
>>>> Laboratorio Sirius HPC
>>>> Universidad Tecnológica de Pereira
>>>>
>>>
>>>
>>
>>
>> --
>> 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
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