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• Using location.search instead of location.hash to transfer the JSON data for cross-domain iframe transport access, due to IE ignoring the hash in redirects.

  18 novembre 2011, par Sebastian Tschan

  m application.js m result.html Using location.search instead of location.hash to transfer the JSON data for cross-domain iframe transport access, due to IE ignoring the hash in redirects.

• FFmpeg with node.js. Transcode a file to another format

  19 juin 2014, par user2757842

  Have a bit of a problem with this, I have an .avi file in which I would like to transcode into a .flv file using FFmpeg, here is what I have so far :

  var ffmpeg = require('fluent-ffmpeg');
  
  
  
  //make sure you set the correct path to your video file
  
  var proc = new ffmpeg({ source: 'C:/Users/Jay/Documents/movie/drop.avi', nolog: true })
  
  
  
  //Set the path to where FFmpeg is installed
  
  .setFfmpegPath("C:\Users\Jay\Documents\FFMPEG")
  
  
  
  //set the size
  
  .withSize('50%')
  
  
  
  // set fps
  
  .withFps(24)
  
  
  
  // set output format to force
  
  .toFormat('flv')
  
  
  
  // setup event handlers
  
  .on('end', function() {
  
      console.log('file has been converted successfully');
  
  })
  
  .on('error', function(err) {
  
      console.log('an error happened: ' + err.message);
  
  })
  
  // save to file <-- the new file I want -->
  
  .saveToFile('C:/Users/Jay/Documents/movie/drop.flv');

  It seems straightforward enough and I can do it through the FFmpeg command line, but I am trying to get it working within a node.js app, here is the error it is returning :

  C:\Users\Jay\workspace\FFMPEGtest\test.js:17
  
  .withSize('50%')
  
   ^
  
  TypeError: Cannot call method 'withSize' of undefined
  
      at Object.<anonymous> (C:\Users\Jay\workspace\FFMPEGtest\test.js:17:2)
  
      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 Function.Module.runMain (module.js:497:10)
  
      at startup (node.js:119:16)
  
      at node.js:906:3
  
  </anonymous>

  It throws the same error for each built in FFmpeg function (.toFormat, .withFPS etc)

  If anyone has a solution to this, I’d greatly appreciate it

• What is the best ffmpeg command keeping the best quality to convert a m3u8 file into a mp4 file ?

  16 novembre 2019, par Nicryc

  Ok so I downloaded a .m3u8 file on the Internet. I saw that this file extension corresponds to a HTTP Live Streaming protocol also called HLS. This protocol consists of an index file (the m3u8 file) that is a text file containing several URL redirecting to .ts files. Those .ts files are video files where each one are a little part of the whole video. Then I searched and found on Wikipedia and on the Apple website that this protocol embeds the MPEG-4 (H.264) video format.

  If I’m not mistaken .mp4 is the file extension of the MPEG-4 (H.264) video format. So a mp4 file is always a MPEG-4 (H.264) video. I use ffmpeg to convert this .m3u8 file into a "normal" video file. Currently I use this command :

  ffmpeg -protocol_whitelist "file,http,https,tcp,tls" -i input.m3u8 output.mp4

  Although even if the video quality is almost perfect it’s a little below the quality of the original m3u8 file. I know I’m really pernickety but is there a better command to keep the original quality ? Or does the ffmpeg convertion command involve inevitably a quality loss ?