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• Merge commit ’4d2d0595cf9dd199c35aefef450952d209a56573’

  21 juillet 2014, par Michael Niedermayer

  Merge commit ’4d2d0595cf9dd199c35aefef450952d209a56573’
  * commit ’4d2d0595cf9dd199c35aefef450952d209a56573’ :
  
    fate : Split audio- and video-related RealMedia targets
  Conflicts :
  
  	tests/fate/real.mak
  Merged-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] tests/fate/real.mak

• Visualizing ffmpeg benchmarks

  2 avril 2020, par Saurabh P Bhandari

  I have generated benchmarks for comparing two approaches taken for scaling down video files (mp4) using ffmpeg tool.

  



  The benchmarks are logged in this format :

  



  x.mp4 Output_Resolution : 360p

Method : A 

real    0m26.817s
user    1m38.058s
sys     0m0.504s

Method : B, some-parameter-for-B : b1

real    0m26.465s
user    1m42.824s
sys     0m1.111s

Method : B, some-parameter-for-B : b2

real    0m26.236s
user    1m42.194s
sys     0m0.862s

Method : B, some-parameter-for-B : b3

real    0m25.050s
user    1m36.492s
sys     0m0.680s


y.mp4 Output_Resolution : 144p

Method : A 

real    1m9.426s
user    3m38.823s
sys     0m1.353s

Method : B, some-parameter-for-B : b1

real    1m4.956s
user    4m13.764s
sys     0m2.875s

Method : B, some-parameter-for-B : b2

real    1m5.033s
user    4m13.455s
sys     0m2.183s

Method : B, some-parameter-for-B : b3

real    0m25.050s
user    1m36.492s
sys     0m0.680s




  



  I am doing this for multiple video files and multiple resolutions. Lets say I need to visualize the comparison of benchmarks(real time) of method A and method B for given a resolution using bar chart below :

  



  

  



  How do I efficiently get the necessary values from the the log and plot them using matplotlib in python ?

  



  (I am more interested in the approach you would take to solve this problem)

  


• Running frei0r filters with ffmpeg - "Could not find module 'pixeliz0r'."

  4 avril 2016, par ksloan

  I installed frei0r using homebrew

  MacK:tmp kevin$ brew list frei0r
  
  /usr/local/Cellar/frei0r/1.4/include/frei0r.h
  
  /usr/local/Cellar/frei0r/1.4/lib/frei0r-1/ (119 files)
  
  /usr/local/Cellar/frei0r/1.4/lib/pkgconfig/frei0r.pc
  
  /usr/local/Cellar/frei0r/1.4/share/doc/ (4 files)

  Then I installed ffmpeg with the --with-frei0r flag, and everything compiled fine

  brew install ffmpeg --with-fdk-aac --with-ffplay --with-freetype --with-libass --with-libquvi --with-libvorbis --with-libvpx --with-opus --with-x265 --with-frei0r

  I tried telling ffmpeg where my frie0r filters were installed with

  export FREI0R_PATH=/usr/local/Cellar/frei0r/1.4/lib/frei0r-1/

  I even created symlinks from the default locations ffmpeg checks...

  MacK:tmp kevin$ ls -l  /usr/local/lib/frei0r-1
  
  lrwxr-xr-x  1 kevin  admin  33  4 Apr 04:43 /usr/local/lib/frei0r-1 -> ../Cellar/frei0r/1.4/lib/frei0r-1

  But I’m still seeing this error :

  [Parsed_frei0r_0 @ 0x7f8938f003c0] Could not find module 'perspective'.
  
  [AVFilterGraph @ 0x7f8938f00160] Error initializing filter 'frei0r' with args 'perspective'
  
  Error initializing complex filters.
  
  Invalid argument

  Full output :

  MacK:tmp kevin$ ffmpeg -i 1.mp4 -filter_complex "frei0r=perspective" out.mp4
  
  ffmpeg version 3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 7.0.2 (clang-700.1.81)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libass --enable-ffplay --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libx265 --enable-nonfree --enable-vda
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
    Duration: 00:00:08.34, start: 0.023220, bitrate: 4293 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 4161 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [Parsed_frei0r_0 @ 0x7f8938f003c0] Could not find module 'perspective'.
  
  [AVFilterGraph @ 0x7f8938f00160] Error initializing filter 'frei0r' with args 'perspective'
  
  Error initializing complex filters.
  
  Invalid argument

  I’ve run out of ideas to try next, what am I missing ? Any help would be greatly appreciated.