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• ffmpeg, add film grain, resize and create sbs file for stereo 3d

  14 juillet 2018, par Anmol Mishra

  I have 2 files with 1080p Res.

  I wish to resize each to 1920x2160, combine both into sbs 3840x2160, add subtle film grain, add burn in subtitles into each eye and finally create sbs 4k stereo 3d video file with CRF 18.

  I have used ffmpeg previously but this is way beyond my understanding for the filters.

• Downloading a specific segment of a YouTube video

  18 mai 2018, par BlueStone

  I normally download files or parts of them using ffmepg command.

  ffmpeg -ss 00:05:00 -i "video url here "   -t 100 -c copy   -avoid_negative_ts 1 out.mkv  

  Now, downloading a YouTube video is not problem using youtube-dl, but I want to download specific part of a video (1080p+), I thought I could use youtube-dl to grab the link of the video and pass it to ffmpeg to do the cutting with the previous code, but could not figure how to do this.

  Searched and tried many commands and stuff here and there, but nothing worked.

• adaptives links for mpeg dash on wowza server not working, status error 404 Not Found

  12 août 2015, par jobin

  adaptives links for mpeg dash on wowza server not working with me, the following are the steps that I used to publish video on wowza :

  1. I install and configure Wowza server, and I tested it and it is working fine.

  2. Transcode this video using ffmepg (I bring these command from wowza documentation) :

     set inputFile="C :\video\sintel.mp4"
     set outputFile="C :\video\sintel"

     ffmpeg -y -i %inputFile% -s 320x180 -y -strict experimental -acodec aac -ab 64k -ac 2 -ar 48000 -vcodec libx264 -vprofile baseline -level 30 -g 48 -b 200000 -threads 64 %outputFile%_320p.mp4
     ffmpeg -y -i %inputFile% -s 640x360 -y -strict experimental -acodec aac -ab 128k -ac 2 -ar 48000 -vcodec libx264 -vprofile baseline -level 30 -g 48 -b 520000 -threads 64 %outputFile%_640p.mp4
     ffmpeg -y -i %inputFile% -s 320x180 -y -strict experimental -acodec aac -ab 64k -ac 2 -ar 48000 -vcodec libx264 -vprofile main -g 48 -b 270000 -threads 64 %outputFile%_400p.mp4
     ffmpeg -y -i %inputFile% -s 420x270 -y -strict experimental -acodec aac -ab 64k -ac 2 -ar 48000 -vcodec libx264 -vprofile main -g 48 -b 570000 -threads 64 %outputFile%_700p.mp4
     ffmpeg -y -i %inputFile% -s 720x406 -y -strict experimental -acodec aac -ab 128k -ac 2 -ar 48000 -vcodec libx264 -vprofile main -g 48 -b 1000000 -threads 64 %outputFile%_1100p.mp4
     ffmpeg -y -i %inputFile% -s 1024x576 -y -strict experimental -acodec aac -ab 128k -ac 2 -ar 48000 -vcodec libx264 -vprofile main -g 48 -b 1200000 -threads 64 %outputFile%_1300p.mp4
     ffmpeg -y -i %inputFile% -s 1080x608 -y -strict experimental -acodec aac -ab 128k -ac 2 -ar 48000 -vcodec libx264 -vprofile main -g 48 -b 1400000 -threads 64 %outputFile%_1500p.mp4

  3. I test the files and all of them workig fine then I moved these files to wowza content folder and create the smil file as following :

  

  <?xml version="1.0" encoding="UTF-8"?>
  
  <smil title="sintel">
  
    
  
      <switch>
  
        <video width="320" height="180" src="sintel_320p.mp4" systemlanguage="eng">
  
          
  
          
  
        </video>
  
        <video width="640" height="360" src="sintel_640p.mp4" systemlanguage="eng">
  
          
  
          
  
        </video>
  
        <video width="320" height="180" src="sintel_400p.mp4" systemlanguage="eng">
  
          
  
          
  
        </video>
  
        <video width="420" height="270" src="sintel_700p.mp4" systemlanguage="eng">
  
          
  
          
  
        </video>
  
        <video width="720" height="406" src="sintel_1100p.mp4" systemlanguage="eng">
  
          
  
          
  
        </video>
  
        <video width="1024" height="576" src="sintel_1300p.mp4" systemlanguage="eng">
  
          
  
          
  
        </video>
  
        <video width="1080" height="608" src="sintel_1500p.mp4" systemlanguage="eng">
  
          
  
          
  
        </video>
  
      </switch>
  
    
  
  </smil>

  4. I use the mpd file (http://191.237.26.137:1935/vod/smil:sintel.smil/manifest.mpd) with http://www.jwplayer.com/innovation/roadmap/mpeg-dash/

  Result : the video work for first few seconds the stop