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• Mix audio input with video to specific location with FFmpeg

  26 septembre 2016, par user2364292

  I created small video editing tool with which you can put some overlay images to the video and show them at specific locations and durations (filter : overlay=enabled(from, to...), etc.).
  Now I also want to add some short audio sounds on the same way like pictures -> adding them to a specific time in the video. That means that overlays and audio sounds should be in one command if possible. I am using amix to merge all sound channels (video.mp4 and sound.mp3) but the thing is that they both start at the beginning. I tried with adelay=1500 but then I actually delay one channel that means I hear duplicate sounds with 1.5 sec delay. So I would like to delay only sound.mp3 input. Am I doing something wrong ?

  My try was that :

  -i video.mp4 -i sound.mp3 -filter_complex amix -preset ultrafast -vcodec libx264 -r 24 -profile:v baseline -threads 14 video_output.mp4

  Thank you very much !

• avdevice/decklink_dec : Convert decklink input module to use codecpar

  8 mai 2016, par Felt, Patrick

  avdevice/decklink_dec : Convert decklink input module to use codecpar
  There are still a couple of deprecated calls that I’m not sure what to do with.
  
  They are both related to some logic around AVCodecContext.coded_frame.
  
  I couldn’t find anywhere that really documented what that was, or where it was intended to move to.
  
  I left the warnings on.
  Reviewed-by : Deti Fliegl <deti@fliegl.de>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavdevice/decklink_dec.cpp

• videoshow npm module not working fine

  14 avril 2016, par Anshul

  I have used videoshow NPM module for creating a video using images but it is not working fine for me it is running twice or thrice and creating multiple videos for same images sometimes. If i am changing the value of loop in the code to ’1’ it is running fine but the slide duration is only one second.

  Here is my code :-

  var images = [
  
      'public/images/1.png',
  
      'public/images/2.png',
  
      'public/images/3.png',
  
      'public/images/4.png',
  
      'public/images/5.png',
  
      'public/images/6.png',
  
      'public/images/7.png',
  
      'public/images/8.png',
  
      'public/images/9.png'
  
  ]
  
  
  
  var videoOptions = {
  
      fps: 25,
  
      loop: 3, // seconds
  
      transition: true,
  
      transitionDuration: 1, // seconds
  
      videoBitrate: 1024,
  
      videoCodec: 'libx264',
  
      size: '640x480',
  
      audioBitrate: '128k',
  
      audioChannels: 2,
  
      format: 'mp4'
  
  }
  
  
  
  var videoPath = 'public/video/test.mp4';
  
  
  
  videoshow(images, videoOptions)
  
  .audio('public/audio/1.mp3')
  
  .save(videoPath)
  
  .on('start', function (command) {
  
      console.log('ffmpeg process started:', command)
  
  })
  
  .on('error', function (err, stdout, stderr) {
  
      res.send({status : false, message: 'Something went wrong. Please try again.'});
  
      res.end();
  
      return;
  
  })
  
  .on('end', function (output) {
  
      res.send({status : true, message: ''});
  
      res.end();
  
      return;
  
  });