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• ffmpeg shell output goes to php header ?

  23 septembre 2014, par Kuba Stachu

  I am trying to use ffmpeg from php script, ex. :

  exec('ffmpeg -i input.mp4 -f ogg -y output.ogv >out.txt')

  Let’s assume it works, it actually doesn’t for multiple reasons, but it’s going to be solved by hosting provider as I have no way to change any config or so.

  What seems strange is that out.txt is 0kb all the time, instead after php script finishes its work I get output like one below :

  Malformed header from CGI script:
  
  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers built on May 10 2013 16:31:05 with gcc 4.8.0 (GCC) 20130502 (prerelease) configurati
  
  (......)
  
  Press [q] to stop, [?] for help
  
  [vp8 @ 0x13e8d00] alloc_buffer: av_image_alloc() failed
  
  [vp8 @ 0x13e8d00] get_buffer() failed!
  
  sh: line 1: 1540 Segmentation fault ffmpeg -i ../uploads/videomod_m_7/433c3f8b9b0cc0f6cbdebba5263ff71809811c20o.webm -f ogg -y ../uploads/videomod_m_7/test2.ogv > out.txt
  
  Expires: Thu, 19 Nov 1981 08:52:00 GMT
  
  Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
  
  Pragma: no-cache
  
  Content-type: text/html 

• FFMPEG Drag and Drop sh file

  29 avril 2021, par WFCDefi

  On Windows I have a simple batch file which I drop video files onto to convert to webms, it saves a lot of time as I prefer to just use the same configuration and don't care much about the names.

  


  @echo off 
echo. 
ffmpeg -i %1 -c:v libvpx-vp9 -quality good -cpu-used 2 -b:v 5000k -qmin 15 -qmax 45 -maxrate 500k -bufsize 1500k -framerate 60 -threads 8 -vf scale=-1:1080 -c:a libvorbis -b:a 192k -f webm %1.webm 
pause


  


  I know the .bat file won't really work in Linux (I'm on pop os so pretty much Ubuntu) so with the other lines removed and the %1 changed to $1 it works. It won't do anything if I try dragging and dropping a video file onto it though.

  


  I can type sudo then drag and drop the .sh file followed by a video into a terminal and press enter and it will have the same effect as dragging a video file onto a bat file in Windows.

  


  Is there a way to recreate dragging and dropping a file directly onto another and it executing in Linux or is the terminal the only way ?

  


• Efficient ogv video conversion in Linux

  19 mai 2016, par Marco Ferro

  I have a ogv video file of 113MB. I converted it to mp4 and reduced its size from command line through ffmpeg. The resulting video is around 12MB sized, but the quality is really bad. I would like to get a better quality at cost of a higher file size, but I don’t know how.
  Can you suggest me a correct way to do that ?

  EDIT :
  This is the full console output of the command :

  Input #0, ogg, from 'ibvs.ogv':
  
     Duration: 00:00:58.86, start: 0.000000, bitrate: 16134 kb/s
  
          Stream #0.0: Data: skeleton
  
          Stream #0.1: Video: theora, yuv420p, 960x864 [PAR 1:1 DAR 10:9], 15 fps, 15 tbr, 15 tbn, 15 tbc
  
  
  
  [buffer @ 0x1dbaa80] w:960 h:864 pixfmt:yuv420p
  
  Output #0, mp4, to 'test.mp4':
  
  
  
      Metadata:
  
          encoder         : Lavf53.21.1
  
          Stream #0.0: Video: mpeg4, yuv420p, 960x864 [PAR 1:1 DAR 10:9], q=2-31, 200 kb/s, 15 tbn, 15 tbc
  
  
  
  Stream mapping:
  
      Stream #0.1 -> #0.0
  
  Press ctrl-c to stop encoding
  
  frame=  883 fps=128 q=31.0 Lsize=    8654kB time=58.87 bitrate=1204.3kbits/s    
  
  video:8646kB audio:0kB global headers:0kB muxing overhead 0.092074%