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• Anomalie #2964 : Développement boite d’options inverser

  26 mars 2013, par b b

  Salut et merci pour le signalement, Le problème vient du fait que sous ie, l’event onchange d’un input est lancé après que l’input perde le focus. Du coup notre implémentation est foireuse avec ce comportement, il faut revoir ça. À ce que je lis ici : (...)

• Xuggler encoding and muxing

  18 décembre 2012, par HeineyBehinds

  I'm trying to use Xuggler (which I believe uses ffmpeg under the hood) to do the following :

  • Accept a raw MPJPEG video bitstream (from a small TTL serial camera) and encode/transcode it to h.264 ; and
  • Accept a raw audio bitsream (from a microphone) and encode it to AAC ; then
  • Mux the two (audio and video) bitsreams together into a MPEG-TS container

  I've watched/read some of their excellent tutorials, and so far here's what I've got :

  // I'll worry about implementing this functionality later, but
  
  // involves querying native device drivers.
  
  byte[] nextMjpeg = getNextMjpegFromSerialPort();
  
  
  
  // I'll also worry about implementing this functionality as well;
  
  // I'm simply providing these for thoroughness.
  
  BufferedImage mjpeg = MjpegFactory.newMjpeg(nextMjpeg);
  
  
  
  // Specify a h.264 video stream (how?)
  
  String h264Stream = "???";
  
  
  
  IMediaWriter writer = ToolFactory.makeWriter(h264Stream);
  
  writer.addVideoStream(0, 0, ICodec.ID.CODEC_ID_H264);
  
  writer.encodeVideo(0, mjpeg);

  For one, I think I'm close here, but it's still not correct ; and I've only gotten this far by reading the video code examples (not the audio - I can't find any good audio examples).

  Literally, I'll be getting byte-level access to the raw video and audio feeds coming into my Xuggler implementation. But for the life of me I can't figure out how to get them into an h.264/AAC/MPEG-TS format. Thanks in advance for any help here.

• Capture video and audio using javascript

  16 janvier 2017, par Anand Soni

  I am trying to capture video and audio from web browser and upload it to the server. The thing is I don’t want to use flash in this.

  So I am using HTML5 feature and a library called RecorderRTC to make it possible. I am using Ruby on Rails in backend. Though I am feeling this feature is still under implementation I am facing challenges.

  Following javascript code I have written : http://pastebin.com/KjwunFfD and here is my rails code :

      uuid = UUID.generate
  
      audio_file_name = "#{uuid}.wav" if params[:chrome]
  
      audio_file_name = "#{uuid}.ogg" if params[:firefox]
  
      video_file_name = "#{uuid}.webm"
  
  
  
      directory = "#{Rails.root}/public/record"
  
      directory = directory + "/chrome" if params[:chrome]
  
      directory = directory + "/firefox" if params[:firefox]
  
  
  
      audio_path = File.join(directory, audio_file_name)
  
      video_path = File.join(directory, video_file_name)
  
      #puts params[:audioBlob].tempfile.read
  
      File.open(audio_path, "wb") { |f| f.write(params[:audioBlob].tempfile.read) }           if params[:audioBlob]
  
      File.open(video_path, "wb") { |f| f.write(params[:videoBlob].tempfile.read) }           if params[:videoBlob]
  
  
  
      output = `ffmpeg -i #{video_path} -i #{audio_path} -acodec copy -vcodec copy #{directory}/#{uuid}.mkv`
  
  
  
      message[:video_url] = "/record/chrome/#{video_file_name}" if params[:chrome]
  
      message[:video_url] = "/record/firefox/#{video_file_name}" if params[:firefox]
  
  
  
      message[:audio_url] = "/record/chrome/#{audio_file_name}" if params[:chrome]
  
      message[:audio_url] = "/record/firefox/#{audio_file_name}" if params[:firefox]
  
  
  
      message[:audio_video_url] = "/record/chrome/#{uuid}.mkv" if params[:chrome]
  
      message[:audio_video_url] = "/record/firefox/#{uuid}.mkv" if params[:firefox]

  My problem is when I try to run this code through Firefox ffmpeg is giving error of codec not found. I am not sure what I am missing. Can any one help ?