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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 ?

• Use ffmpeg to add multiple subtitles separately to a video

  3 mars 2024, par Appa

  I am trying to add multiple languages of subtitles to a video using ffmpeg. I succeeded in adding 1 language, but can't seem to add a second one. 
I use this simple script to add english subtitles to my video.

  



  ffmpeg -i %1 -i subs_eng.srt -map 0 -vcodec copy -acodec copy -scodec subrip -metadata:s:s:0 language=English "%~n1"_eng.mkv


  



  In addition, I run another script to add the Dutch subtitles.

  



  ffmpeg -i %1 -i subs_nl.srt -map 0? -vcodec copy -acodec copy -scodec subrip -metadata:s:s:1 language=Dutch "%~n1"_nl.mkv


  



  But whenever I add the second language, it doesn't seem to do anything. The command terminal shows that ffmpeg is processing the video, but there is only 1 subtitle language available in vlc media player (the first one).

  



  I really want to be able to add it in 2 takes rather than in the same script, as I don't have both languages for all of my video's.

  


• ffmpeg : why metadata of audio tracks is not written ?

  19 octobre 2020, par elbarna

  I want to change the metadata of my avi.

  


  ffmpeg -y -i oldvhs.avi -c:v copy -c:a copy -metadata:s:a:0 language=eng  -metadata:s:a:1 language=ita -metadata:s:v:0 title="The old movie" -map 0 new-oldvhs.avi


  


  When I use mplayer for testing

  


  mplayer -aid 1 new-oldvhs.avi OK
mplayer -aid 2 new-oldvhs.avi OK


  


  But when i try the alang..

  


  mplayer -alang ita new-oldvhs.avi #SPEAK ENGLISH!
mplayer -alang eng new-oldvhs.avi #SPEAK ENGLISH!


  


  I open the file with mediainfo and avidemux and metadata tracks is not written, mediainfo report nothing, avidemux report unknown.
Where is the fault ?