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• Video streaming through HAProxy

  21 janvier 2015, par n00bie

  I want to stream video from my webcam to many clients (all clients use html 5 video player).

  Now i have this :

  Server :

  sudo gst-launch-0.10 tcpserversrc port = 1234 ! oggparse ! tcpserversink port = 1235

  Sender :

  ffmpeg -f video4linux2 -s 320x240 -i /dev/mycam -f alsa -i hw:1 -codec:v libtheora -qscale:v 5 -codec:a libvorbis -qscale:a 5 -f ogg http://localhost:1234

  Receiver :

  <video width="320" height="240" autoplay="autoplay">
  
    <source src="http://localhost:1235" type="video/ogg">
  
    Your browser does not support the video tag.
  
  </source></video>

  It works.

  Now i want to increase count of web cameras. Therefore, i need to increase count of gstreamer’s. But, i want to use only port 80 to communucate between server and clients, therefore i try to use HAProxy.

  HAProxy config : (only one web camera)

  global
  
          maxconn 4096
  
          user workshop-staff
  
          group workshop-staff
  
          daemon
  
          log 127.0.0.1 local0 debug
  
  
  
  defaults
  
          log     global
  
          mode    http
  
          option  httplog
  
          option  dontlognull
  
          retries 3
  
          option redispatch
  
          option http-server-close
  
          option forwardfor
  
          maxconn 2000
  
          timeout connect 5s
  
          timeout client  15min
  
          timeout server  15min
  
          option http-no-delay
  
  
  
  frontend public
  
          bind *:80
  
          use_backend stream_input if { path_beg /stream_input }        
  
          use_backend stream_output if { path_beg /stream_output }
  
  
  
  backend stream_input
  
          server stream_input1 localhost:1234
  
  
  
  backend stream_output
  
          server stream_output1 localhost:1235

  Server :

  sudo gst-launch-0.10 tcpserversrc port = 1234 ! oggparse ! tcpserversink port = 1235

  Sender :

  ffmpeg -f video4linux2 -s 320x240 -i /dev/mycam -f alsa -i hw:1 -codec:v libtheora -qscale:v 5 -codec:a libvorbis -qscale:a 5 -f ogg http://localhost/stream_input

  Receiver :

  <video width="320" height="240" autoplay="autoplay">
  
    <source src="http://localhost/stream_output" type="video/ogg">
  
    Your browser does not support the video tag.
  
  </source></video>

  But, in this case, HTML5 video player shows nothing.

  If i change receiver to : (i.e. use localhost:1235 instead of localhost/stream_output)

  <video width="320" height="240" autoplay="autoplay">
  
    <source src="http://localhost:1235" type="video/ogg">
  
    Your browser does not support the video tag.
  
  </source></video>

  It works. Could someone help me ?

• Dreamcast Operating Systems

  16 septembre 2010, par Multimedia Mike — Sega Dreamcast

  The Sega Dreamcast was famously emblazoned with a logo proudly announcing that it was compatible with Windows CE :

  
  
  

  It’s quite confusing. The console certainly doesn’t boot into some version of Windows to launch games. Apparently, there was a special version of CE developed for the DC and game companies had the option to leverage it. I do recall that some game startup screens would similarly advertise Windows CE.

  Once the homebrew community got ahold of the device, the sky was the limit. I think NetBSD was the first alternative OS to support the Dreamcast. Meanwhile, I have recollections of DC Linux and LinuxDC projects along with more generic Linux-SH and SH-Linux projects.

  
  
  

  DC Evolution hosts a disc image available for download with an unofficial version of DC Linux, assembled by one Adrian O’Grady. I figured out how to burn the disc (burning DC discs is a blog post of its own) and got it working in the console.

  It’s possible to log in directly via the physical keyboard or through a serial terminal provided that you have a coder’s cable. That reminds me– my local Fry’s had a selection of USB-to-serial cables. I think this is another area that is sufficiently commoditized that just about any cable ought to work with Linux out of the box. Or maybe I’m just extrapolating from the experience of having the cheapest cable in the selection (made by io connect) plug and play with Linux.

  
  
  

  Look ! No messy converter box in the middle as in the Belkin case. The reason I went with this cable is that the packaging claimed it was capable of up to 500 Kbits/sec. Most of the cables advertised a max of 115200 bps. I distinctly recall being able to use the DC coder’s cable at 230400 bps a long time ago. Alas, 115200 seems to be the speed limit, even with this new USB cable.

  Anyway, the distribution is based on a 2.4.5 kernel circa 2001. I tried to make PPP work over the serial cable but the kernel doesn’t have support. If you’re interested, here is some basic information about the machine from Linux’s perspective, gleaned from some simple commands. This helps remind us of a simpler time when Linux was able to run comfortably on a computer with 16 MB of RAM.

  Debian GNU/Linux testing/unstable dreamcast ttsc/1
  dreamcast login : root
  
  Linux dreamcast 2.4.5 #27 Thu May 31 07:06:51 JST 2001 sh4 unknown
  Most of the programs included with the Debian GNU/Linux system are
  
  freely redistributable ; the exact distribution terms for each program
  
  are described in the individual files in /usr/share/doc/*/copyright
  Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
  
  permitted by applicable law.
  dreamcast : # uname -a
  
  Linux dreamcast 2.4.5 #27 Thu May 31 07:06:51 JST 2001 sh4 unknown
  dreamcast : # cat /proc/cpuinfo 
  
  cpu family : SH-4
  
  cache size : 8K-byte/16K-byte
  
  bogomips : 199.47
  Machine : dreamcast
  
  CPU clock : 200.00MHz
  
  Bus clock : 100.00MHz
  
  Peripheral module clock : 50.00MHz
  dreamcast : # top -b
   09:14:54 up 14 min,  1 user,  load average : 0.04, 0.03, 0.03
  
  15 processes : 14 sleeping, 1 running, 0 zombie, 0 stopped
  
  CPU states :   1.1% user,   5.8% system,   0.0% nice,  93.1% idle
  
  Mem :     14616K total,    11316K used,     3300K free,     2296K buffers
  
  Swap :        0K total,        0K used,        0K free,     5556K cached
    PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
  
    219 root      18   0  1072 1068   868 R     5.6  7.3   0:00 top
  
      1 root       9   0   596  596   512 S     0.0  4.0   0:01 init
  
      2 root       9   0     0    0     0 SW    0.0  0.0   0:00 keventd
  
      3 root       9   0     0    0     0 SW    0.0  0.0   0:00 kswapd
  
      4 root       9   0     0    0     0 SW    0.0  0.0   0:00 kreclaimd
  
      5 root       9   0     0    0     0 SW    0.0  0.0   0:00 bdflush
  
      6 root       9   0     0    0     0 SW    0.0  0.0   0:00 kupdated
  
      7 root       9   0     0    0     0 SW    0.0  0.0   0:00 kmapled
  
     39 root       9   0   900  900   668 S     0.0  6.1   0:00 devfsd
  
     91 root       8   0   652  652   556 S     0.0  4.4   0:00 pump
  
     96 daemon     9   0   524  524   420 S     0.0  3.5   0:00 portmap
  
    149 root       9   0   944  944   796 S     0.0  6.4   0:00 syslogd
  
    152 root       9   0   604  604   456 S     0.0  4.1   0:00 klogd
  
    187 root       9   0   540  540   456 S     0.0  3.6   0:00 getty
  
    201 root       9   0  1380 1376  1112 S     0.0  9.4   0:01 bash
  

  Note that at this point I had shutdown both gpm and inetd. The rest of the processes, save for bash, are default. The above stats only report about 14 MB of RAM ; where are the other 2 MB ?

  dreamcast : # df -h
  Filesystem            Size  Used Avail Use% Mounted on
  /dev/rd/1             2.0M  560k  1.4M  28% /
  

• How do you start ffserver when the server starts up ? [closed]

  14 mars 2013, par CoryG

  I have ffmpeg's ffserver installed on Ubuntu but want to start it as a daemon feeding it a config file when the server boots, how do I go about doing so ?