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• Starting multiple upstart services after a parent service

  16 mars 2013, par CoryG

  I'm trying to configure upstart to start an ffserver process and many (21) ffmpeg processes - the ffmpeg processes must be started after the ffserver process and all of them should be respawned if they stop.

  So far, for the ffserver process I have :

  # ffserver
  
  
  
  description     "ffserver"
  
  
  
  start on (filesystem and net-device-up IFACE=eth0) and runlevel [2345]
  
  stop on runlevel [!2345]
  
  
  
  respawn
  
  respawn limit 10 5
  
  
  
  pre-start script
  
      test -x /usr/local/bin/ffmpeg || { stop; exit 0; }
  
      test -x /usr/local/bin/ffserver || { stop; exit 0; }
  
  end script
  
  
  
  script
  
      /usr/local/bin/ffserver -f /etc/ffserver.conf
  
  end script
  
  
  
  post-start script
  
      PID=`status ffserver | egrep -oi '([0-9]+)$' | head -n1`
  
      echo $PID > /var/run/ffserver.pid
  
  end script
  
  
  
  post-stop script
  
      rm -f /var/run/ffserver.pid
  
  end script

  Which works fine for ffserver, however I would like to know how to get the ffmpeg services into a similar startup configuration managed by upstart (ideally within a single upstart config file, but I can make 21 different config files if required).

  (it might be worth noting that I'm using the NoDaemon option within the /etc/ffserver.conf file to ensure it doesn't try to daemonize itself and the ffmpeg instances will likewise not be self-daemonized - I would however like pid files for them in /var/run/ffmpegx.pid where x is an identifier [[0-15],0_1_2_3,4_5_6_7,8_9_10_11,12_13_14_15,all] for some other reasons)

• Audio effect ( a 20ms delay between right and the left channel) using Web Audio API or any Javascript Audio Library like howler.js, tone.js ?

  15 juillet 2020, par questionare_101

  I was wondering if there any option in howler.js, tone.js or any other javascript audio library which I can use to add a 20ms delay between the right and the left channel which makes the audio listening experience more immersive.

  


  Can it be achieved using Audio sprites with howler.js ? (but I guess it can't separate the right and the left channels)
https://medium.com/game-development-stuff/how-to-create-audiosprites-to-use-with-howler-js-beed5d006ac1

  


  Is there any ?

  


  Have also asked the same quest here : https://github.com/goldfire/howler.js/issues/1374

  


  I usually enable this option under ffdshow audio processor while playing audio using MPC-HC (Mega Version) on my pc. I was wondering how can I do it using Web Audio API or howler.js ?

  


  

  


  Somewhat like this kind of effect : Just delay the either channel by 20ms
Like we do in Adobe Audition


  


• hevc/rext : basic infrastructure for supporting range extension

  15 juillet 2014, par Mickaël Raulet

  hevc/rext : basic infrastructure for supporting range extension
  
   support for 4:2:2 and 4:4:4 up to 12 bits
  
   add a new profile for range extension
  (cherry picked from commit d3c067fa65bbc871758d28aa07f54123430ca346)
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/avcodec.h
  • [DH] libavcodec/hevc.c
  • [DH] libavcodec/hevc.h
  • [DH] libavcodec/hevc_cabac.c
  • [DH] libavcodec/hevc_filter.c
  • [DH] libavcodec/hevc_ps.c
  • [DH] libavcodec/hevcdsp.c
  • [DH] libavcodec/hevcdsp.h
  • [DH] libavcodec/hevcdsp_template.c
  • [DH] libavcodec/hevcpred.c
  • [DH] libavcodec/hevcpred_template.c