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• Revision 122257 : [Salvatore] [source:lang/ saisies] Export depuis https://trad.spip.net ...

  7 février 2020, par Salvatore — Log

  [Salvatore] saisies Export depuis ​https://trad.spip.net de la langue en
  [Salvatore] saisies Export depuis ​https://trad.spip.net de la langue fr_tu
  [Salvatore] saisies Export depuis ​https://trad.spip.net de la langue nl
  [Salvatore] saisies Mise a jour du bilan depuis ​https://trad.spip.net

• How use ffmpeg (fluent-ffmpeg) in electron app

  12 août 2017, par R3tter

  I have problems with fluent-ffmpeg.
  Here is my code.

  const ffmpeg = require('fluent-ffmpeg');
  
  let newPath = path.slice(0, path.length - 4);
  
  ffmpeg(path)
  
              .output(newPath+'mp3')
  
              .run()

  All work, but when i bundle app with electron-builder, I have next error "Cannot find ffmpeg at /Users/Krot/Desktop/screencap/dist/mac/DesCap.app/Contents/".
  I was advised to use ffmpeg-statics, but I do not understand how.
  And here is my package.json build

  "build": {
  
      "appId": "screen.capture.app",
  
      "mac": {
  
        "category": "screen.capture.app",
  
        "target": "dmg",
  
        "icon": "build/App_ico.icns"
  
      },
  
      "win": {
  
        "target": "NSIS",
  
        "icon": "build/App_ico.ico"
  
      },
  
      "asarUnpack": [ "**/app/node_modules/fluent-ffmpeg/*" ]
  
    }

  Please help me

• Precise image overlay over video using ffmpeg

  22 août 2017, par Sunny Tambi

  I want to overlay various icon-images over a given video (which is created using the sequence of images) in a time and position precise manner. I am using FFmpeg for the same.
  Here are the commands I am using :

  Image to video conversion command

  ffmpeg -framerate 5 -start_number 0 -i images/img%04d.png -vframes 1000 -r 30 -vcodec libx264 -crf 25  -pix_fmt yuv420p out.mp4 -y

  Images superimpose over video command

  ffmpeg -analyzeduration 10000 -hwaccel auto -i out.mp4 -i icons/up.png -i icons/down.png -i icons/left.png -i icons/right.png -i icons/top.png -i icons/bottom.png -i icons/side.png -filter_complex [0:v]setpts=PTS-STARTPTS[0];
  
  [1:v]setpts=PTS-STARTPTS[i1];
  
  [2:v]setpts=PTS-STARTPTS[i2];
  
  [3:v]setpts=PTS-STARTPTS[i3];
  
  [4:v]setpts=PTS-STARTPTS[i4];
  
  [5:v]setpts=PTS-STARTPTS[i5];
  
  [6:v]setpts=PTS-STARTPTS[i6];
  
  [0][i1]overlay=211.875:319.916:enable='between(t,0.610,0.910)'[1];
  
  [1][i2]overlay=212.344:309.516:enable='between(t,1.810,2.110)'[2];
  
  [2][i3]overlay=37.969:332.396:enable='between(t,2.775,3.075)'[3];
  
  [3][i4]overlay=202.500:307.436:enable='between(t,3.626,3.926)'[4];
  
  [4][i5]overlay=37.734:296.203:enable='between(t,4.531,4.831)'[5];
  
  [5][i6]overlay=208.359:313.676:enable='between(t,5.602,5.902)'[6];
  
  [6][i7]overlay=34.688:383.150:enable='between(t,6.733,7.033)'[7];
  
  -map [7] -y -movflags +faststart superimposed.mp4

  My problem is that I am not getting precision in time. i.e. if there is an icon to be overlayed at 0.61 sec, it doesn’t come exactly at 0.61 sec. Sometimes it comes at 1.0 sec, sometimes at 0.30 sec and sometimes at some other unpredictable time.

  I have an HTML5 video player where the user is allowed to seek the video with 100-millisecond precision. The user expects the icon to see precisely at 0.61 sec. However, above inaccuracy limits the capabilities of my video player.

  Please suggest what could be wrong in my implementation/command.