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• How many "Ruby on Rails" sites can be hosted using sub url in apache configuration file on apache4 with passenger4 on Ubuntu server ?

  17 octobre 2013, par user1731249

  Server's Hardware config :
  Ubuntu server 12.04, CPU : dual code (64-bit), RAM : 8GB, Disk : 200GB.

  Server's Software config :
  Apache2, Passenger4, Rails4, ruby2, MySQL.

  I'm developing a Ruby on Rails website which performs following tasks.

  1. Upload a series of images as zip.
  2. Extract zip images to temp directory.
  3. Convert series of images to video using FFMPEG.
  4. updating video info in MySQL db
  5. Viewing the video in HTML5 video tag.

  Maximum length of single video being 1min and on an average there may be 50 videos to be converted per day. I created three copies (Don't ask me why !) of same website and hosting three sites as sub-URLs like "example.com" being the domain and example.com/site1, example.com/site2, example.com/site3. Below is the Apache configuration :
  RailsAutoDetect off

  ServerName 127.0.0.1

      DocumentRoot /home/ubuntuuser/work/public
  
      ErrorDocument 404 /404.html
  
  
  
  RailsBaseURI /site1
  
  
  
      <directory></directory>home/ubuntuuser/work/site1/advisor/public>
  
              Allow from all
  
      Options -MultiViews
  
              RailsEnv production
  
      
  
  
  
  RailsBaseURI /site2
  
  
  
  <directory></directory>home/ubuntuuser/work/site2/advisor/public>
  
              Allow from all
  
      Options -MultiViews
  
              RailsEnv production
  
      
  
  
  
      RailsBaseURI /site3
  
  
  
  <directory></directory>home/ubuntuuser/work/site3/advisor/public>
  
              Allow from all
  
      Options -MultiViews
  
              RailsEnv production
  
      

  How many such sites can I host with sub-URLs without big performance drag ?
  Also please help to do a performance test for all the sub-URLs.

• Input picture width is greater than stride ffmpeg

  20 juin 2015, par user3455531

  i am using ffmpeg to convert 3gp into mp4. here is my ffmpeg command

   /usr/local/bin/ffmpeg -y -i video.3gp -vf scale="640:trunc(ow/a/2)*2",setsar=1/1 -pix_fmt yuv420p -c:v libx264 -preset slow -profile:v baseline -threads "32" -x264opts level=3.0:ref=1 -minrate 350k -maxrate 350k -b:v 350k -r:v 25/1 -force_fps -crf 29 -movflags +faststart -c:a libfaac -b:a 128k -pass 1 videoout.mp4

  all conversions are working without problems since an year. but today someone uploaded a 3gp on the website and i started getting this error. any way to get rid of it

• Converting MP4 to OGG and WEBM formats with PHP and FFMPEG [on hold]

  31 août 2013, par Rufat Nuriev

  I want to write my own video sharing website (php). Different browsers support different file formats. I need only 3 formats - OGG, MP4, and WEBM. Upload will support only MP4 files. So I have a problem about video converting. I dont know how to use ffmpeg. How can I convert the mp4 file to ogg and webm with ffmpeg and php. Please, answer from 0. (Sorry, for my poor English) Thanks :)