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• FFmpegWrapper - get exact segment start or end times ?

  21 décembre 2015, par Stefan Kendall

  Right now, I’m using FFmpegWrapper, and I watch for changes via kernel events. This gets the segments when they’re created, but I’m not sure how accurate this is.

  Really, I want to know the presentation timestamp of when the hls segment is created. Right now I capture and encode frames manually and write packets via
  FFOutputFile *outputFile;
[_outputFile writePacket:_packet error:&error];

  So I have each frame’s presentationTimestamp, but I don’t know which frame goes to which eventual MPEG-TS segment. Once I write to the FFOutputFile, it’s a blackbox to me.

  Is there any way to know what frame will go to what segment ahead of time, or get a callback from FFmpeg when a new segment is written ?

  Exact times are ideal. Close times are better. Watching the directory for new files via kernel events is what I have right now, so any solution of that time magnitude isn’t useful.

• How to install this nodejs Application

  15 février 2016, par metalbug

  https://github.com/hexator/live4chan

  i have VMware run ubuntu-14.10-server and 15.10-server

  sudo apt-get install -y 
  
       git mongodb imagemagick libcairo2-dev libjpeg8-dev 
  
       libpango1.0-dev libgif-dev build-essential g++ ffmpeg curl

  install success

  git clone https://github.com/hexator/live4chan.git; 
  
  cd live4chan; 
  
  npm install

  but have errors

  test@ubuntu:~/live4chan$ npm start
  
  
  
      LiveChan@0.0.1 start /home/test/live4chan
  
      node lib/index.js
  
  
  
  Missing certificate or private key
  
  Running with insecure server
  
  info - socket.io started
  
  connect.limit() will be removed in connect 3.0
  
  connect.multipart() will be removed in connect 3.0
  
  visit https://github.com/senchalabs/connect/wiki/Connect-3.0 for alternatives
  
  connect.limit() will be removed in connect 3.0
  
  
  
  module.js:340
  
  throw err;
  
  ^
  
  Error: Cannot find module 'carrier'
  
  at Function.Module._resolveFilename (module.js:338:15)
  
  at Function.Module._load (module.js:280:25)
  
  at Module.require (module.js:364:17)
  
  at require (module.js:380:17)
  
  at Object. (/home/test/ircd.js/lib/server.js:24:15)
  
  at Module._compile (module.js:456:26)
  
  at Object.Module._extensions..js (module.js:474:10)
  
  at Module.load (module.js:356:32)
  
  at Function.Module._load (module.js:312:12)
  
  at Module.require (module.js:364:17)
  
  
  
  npm ERR! Linux 4.2.0-16-generic
  
  npm ERR! argv "node" "/usr/local/bin/npm" "start"
  
  npm ERR! node v0.10.42
  
  npm ERR! npm v3.7.2
  
  npm ERR! code ELIFECYCLE
  
  npm ERR! LiveChan@0.0.1 start: node lib/index.js
  
  npm ERR! Exit status 8
  
  npm ERR!
  
  npm ERR! Failed at the LiveChan@0.0.1 start script 'node lib/index.js'.
  
  npm ERR! Make sure you have the latest version of node.js and npm installed.
  
  npm ERR! If you do, this is most likely a problem with the LiveChan package,
  
  npm ERR! not with npm itself.
  
  npm ERR! Tell the author that this fails on your system:
  
  npm ERR! node lib/index.js
  
  npm ERR! You can get information on how to open an issue for this project with:
  
  npm ERR! npm bugs LiveChan
  
  npm ERR! Or if that isn't available, you can get their info via:
  
  npm ERR! npm owner ls LiveChan
  
  npm ERR! There is likely additional logging output above.
  
  
  
  npm ERR! Please include the following file with any support request:
  
  npm ERR! /home/test/live4chan/npm-debug.log
  
  
  
  ==========================================================
  
  /home/test/live4chan/npm-debug.log
  
  
  
  0 info it worked if it ends with ok
  
  1 verbose cli [ 'node', '/usr/local/bin/npm', 'start' ]
  
  2 info using npm@3.7.2
  
  3 info using node@v0.10.42
  
  4 verbose run-script [ 'prestart', 'start', 'poststart' ]
  
  5 info lifecycle LiveChan@0.0.1~prestart: LiveChan@0.0.1
  
  6 silly lifecycle LiveChan@0.0.1~prestart: no script for prestart, continuing
  
  7 info lifecycle LiveChan@0.0.1~start: LiveChan@0.0.1
  
  8 verbose lifecycle LiveChan@0.0.1~start: unsafe-perm in lifecycle true
  
  9 verbose lifecycle LiveChan@0.0.1~start: PATH: /usr/local/lib/node_modules/npm/bin/node-gyp-bin:/home/test/live4chan/node_modules/.bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
  
  10 verbose lifecycle LiveChan@0.0.1~start: CWD: /home/test/live4chan
  
  11 silly lifecycle LiveChan@0.0.1~start: Args: [ '-c', 'node lib/index.js' ]
  
  12 silly lifecycle LiveChan@0.0.1~start: Returned: code: 8 signal: null
  
  13 info lifecycle LiveChan@0.0.1~start: Failed to exec start script
  
  14 verbose stack Error: LiveChan@0.0.1 start: node lib/index.js
  
  14 verbose stack Exit status 8
  
  14 verbose stack at EventEmitter. (/usr/local/lib/node_modules/npm/lib/utils/lifecycle.js:239:16)
  
  14 verbose stack at EventEmitter.emit (events.js:98:17)
  
  14 verbose stack at ChildProcess. (/usr/local/lib/node_modules/npm/lib/utils/spawn.js:24:14)
  
  14 verbose stack at ChildProcess.emit (events.js:98:17)
  
  14 verbose stack at maybeClose (child_process.js:766:16)
  
  14 verbose stack at Process.ChildProcess._handle.onexit (child_process.js:833:5)
  
  15 verbose pkgid LiveChan@0.0.1
  
  16 verbose cwd /home/test/live4chan
  
  17 error Linux 4.2.0-16-generic
  
  18 error argv "node" "/usr/local/bin/npm" "start"
  
  19 error node v0.10.42
  
  20 error npm v3.7.2
  
  21 error code ELIFECYCLE
  
  22 error LiveChan@0.0.1 start: node lib/index.js
  
  22 error Exit status 8
  
  23 error Failed at the LiveChan@0.0.1 start script 'node lib/index.js'.
  
  23 error Make sure you have the latest version of node.js and npm installed.
  
  23 error If you do, this is most likely a problem with the LiveChan package,
  
  23 error not with npm itself.
  
  23 error Tell the author that this fails on your system:
  
  23 error node lib/index.js
  
  23 error You can get information on how to open an issue for this project with:
  
  23 error npm bugs LiveChan
  
  23 error Or if that isn't available, you can get their info via:
  
  23 error npm owner ls LiveChan
  
  23 error There is likely additional logging output above.
  
  24 verbose exit [ 1, true ]

  I tried this :
  npm install carrier

  Or an error.

  and install Other versions of nodejs

  wget http://nodejs.org/dist/latest-v0.10.x/node-v0.10.42.tar.gz
  
  wget http://nodejs.org/dist/latest-v0.12.x/node-v0.12.10.tar.gz 
  
  wget http://nodejs.org/dist/latest-v4.x/node-v4.3.0.tar.gz
  
  wget http://nodejs.org/dist/latest-v5.x/node-v5.6.0.tar.gz
  
  tar zxvf node-v4.3.0.tar.gz
  
  cd node-v4.3.0
  
  ./configure 
  
  make
  
  sudo make install

  Nothing happened

  please help me
  Or you can tell me how to install, detailed, thank you very much !

• Can I pass a list of image into the input method of ffmpeg-python

  31 janvier 2023, par se7en

  My task involves using ffmpeg to create video from image sequence.
the code belows solves the problem.

  


  import ffmpeg

video = ffmpeg.input('/path/to/images/*.jpg', pattern_type='glob',framerate=20).output(video.mp4).run()


  


  However since the image data we are getting follows the pattern

  


  1.jpg,
2.jpg,
3.jpg
.
.
20.jpg
.
.
100.jpg


  


  the video get created with the glob pattern 1.jpg, 100.jpg, 11.jpg, 12.jpg, ... 2.jpg, 20.jpg, 21.jpg ... which is very unpleasant to watch.

  


  Is there anyway I can pass a list or anything else aside a path/glob pattern where the images are sorted in order.
Also as a bonus I will be happy if I can choose which files to add as an the input method input()