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• Powershell Script Exits Handbrake CLI

  23 décembre 2014, par Arnav Attri

  With the help of google, I workaround a Powershell script for handbrake automation. Now, the issue is when the source folder is empty the Powershell script exits.

  Here’s the scenario :

  1. I downloaded someone files - automated via RSS.
  2. They are placed in source folder.
  3. Powershell script works and encoding starts and successfully gets over.
  4. Now, when the encode is completed and in case of new download/file doesn’t arrive in the source folder, the script exits.

  Code is in PasteBin which has more comments but should be easy to infer what the script does

  $inputpath = "I:\S" 
  
  $outputpath = "I:\E"
  
  
  
  $movies = ls $inputpath
  
  
  
  foreach($movie in $movies){
  
      $name = $movie.basename
  
  
  
      if(!(test-path -path "$outputpath\$name.mkv")){
  
          C:\"Program Files"\handbrake\HandBrakeCLI.exe -i "$inputpath\$movie" -o "$outputpath\$name.mkv" `
  
          -e x264 -b 1000 -2 -T -a 1,1 -E mp3 -B 112 --mixdown stereo -f mkv --detelecine --decomb `
  
          --loose-anamorphic -m -x rc-lookahead=30:ref=4:bframes=3:me=umh:subme=9:analyse=none:deblock=1:0:0:8x8dct=1
  
      }
  
  }

• suitable video encoding for browsers

  26 juin 2022, par seriously

  I was researching how illegal movie streaming services handle all the traffic they get and to understand that I had to follow the steps they perform to get the video data to the users. I got to the stage of video transmission and noticed something that boggled me. Most of the illegal movie streaming sites get their movies/tv-shows through piracy/torrents and even most of the streamers are sister companies of the piracy websites. Now when I took a look at the video encodings of the torrent movies and shows they are h.265 but h.265 is not supported by popular browsers like chrome, firefox edge... Does this mean they (the streamers) have to re-encode every h.265 videos to avc/h.264 before they stream it ? If that's the case, that takes them a huge amount of time to convert their whole movie catalog to h.264 not to mention the space they require to save them. Am I taking a look at this the right way ? Do they really convert and store 2, 3 ... differently encoded video files and stream the suitable one ? Or can they somehow convert the chunks of data they are streaming to h.264 live simultaneously without having to store the h.264 formats hence saving conversion time and space ?

  


• How to extract orientation information from videos ?

  23 décembre 2016, par Sid

  After surfing through tons of documentation on the web it seems that the iPhone always shoots the video at a 480x360 aspect ratio and applies a transformation matrix on the video track. (480x360 may change but its always the same for a given device)

  Here is a way of modifying the ffmpeg source within a iOS project and accessing the matrix http://www.seqoy.com/correct-orientation-for-iphone-recorded-movies-with-ffmpeg/

  Here is a cleaner way of finding the transformation matrix in iOS-4
  how to detect (iphone sdk) if a video file was recorded in portrait orientation, or landscape

  How can the orientation of the video be extracted in either of the options below -
  
   iOS 3.2
  
   ffmpeg (through the command line server side)
  
   ruby
  

  Any help will be appreciated.