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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.

• battery performance of vlc player on android

  7 juillet 2013, par rajneesh

  i want to support custom video file-format to be played on android.
  for the purpose i want to modify the vlc player for android, but i am concerned that vlc might be doing "software video decoding" and which might have impact on battery life.

  I want to understand the following

  1. Is there any battery life comparison between software and hardware decoding of video codecs.
  2. does vlc on android make use of hardware decoder.if available on phone ?
  3. does file format have any impact on the selection of hardware or software decoder

• brodcast png & video ffmpeg with raspberry

  6 mars 2021, par FoxFr

  Someone can help me to add a image during 10s beetwen the videos ?
or explain me how do that

  


  ffmpeg \
-i /dev/video0 \
-i /dev/video2 \
-i /home/pi/videopi/map.png \
-stream_loop -1 -re -i "/home/pi/videopi/bed.mp3" \
-filter_complex "[0][1]overlay=enable='lt(mod(t,60),30)'[v];[v]drawtext=textfile=/home/pi/videopi/gps.txt:reload=1:x=30:y=100:fontfile=OpenSans.ttf:font$
-map "[v]" \
-map 2:a \
-c:v libx264 -b:v 4000k -maxrate 4000k -bufsize 8000k -g 50 -c:a aac \
-f flv rtmp://a.rtmp.youtube.com/live2/XXXXXXXXXX


  


  Below the sequence wished

  


  |-> video0 - duration 30" --> map.png - duration 10" --> video2 - duration 30" --|
|                                                                                | 
|--------------------------------------- loop -----------------------------------|


  


  I'd try to put

  


  -f image2 -loop 1 -i "/home/pi/videopi/acmo/map.png" \


  


  instead of

  


  -i /dev/video0 \


  


  without success