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## nginxvarcore.md

      
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                staylet
                / nginxvarcore.md
            
            
              Created
              April 17, 2017 13:21
                — forked from esfand/nginxvarcore.md
            
              
                Nginx Variables
              
          
    Embedded Variables

The ngx_http_core_module module supports embedded variables with names matching the Apache Server variables.
First of all, these are variables representing client request header fields, such as
$http_user_agent, $http_cookie, and so on.
Also there are other variables:

$arg_name

argument name in the request line


## convert.md

      
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                staylet
                / convert.md
            
            
              Created
              August 23, 2024 10:58
                — forked from maximebories/convert.md
            
              
                FFmpeg command to convert webm to mp4 video files
              
          
    ffmpeg -i input.webm -c:v libx264 -preset slow -crf 22 -c:a aac -b:a 128k output.mp4

This ffmpeg command converts a .webm video file to a standard .mp4 file using the libx264 codec for video, aac codec for audio, and a CRF value of 22. The preset is set to 'slow' for higher quality encoding, and the audio bitrate is set to 128 kbps.