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• compile ffmpeg decode only without audio codecs

  28 juillet 2016, par Rob

  I work on a media manager and use ffmpeg.exe to extract screenshots.
  With the latest size of ffmpeg.exe exceeding 35MB, I am attempting to build ffmpeg without the majority of its functions, to allow only saving of a frame of video.

  I had thought disabling many of the filters, Audio Codecs etc would shrink the size of ffmpeg to something more manageable.

  Following this guide
  https://pracucci.com/compile-ffmpeg-on-windows-with-visual-studio-compiler.html
  to allow building of ffmpeg using Visual Studio 2015, I have come to the part of ./configuration and hit a wall.
  With so many options and no idea what all of them mean or do, I am asking if someone in the community can give me laymans instructions.

  I also know that I need to build x264, and possible x265 (HEVC), but am not sure if there is anything other codecs needed.
  In the end, I and am hoping to just have the one file, ffmpeg.exe for use in the media manager project.

  The code I use to get a screenshot is as follows

  Public Shared Function CreateScreenShot(ByVal FullPathAndFilename As String, ByVal SavePath As String, ByVal sec As Integer, Optional ByVal Overwrite As Boolean = False) As Boolean
  
      If Not File.Exists(SavePath) Or Overwrite Then
  
          Try
  
              IO.File.Delete(SavePath)
  
          Catch
  
              Return False
  
          End Try
  
          If IO.File.Exists(FullPathAndFilename) Then
  
              Dim myProcess As Process = New Process
  
              Try
  
                  Dim seconds As Integer = sec
  
                  myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
  
                  myProcess.StartInfo.CreateNoWindow = False
  
                  myProcess.StartInfo.FileName = Utilities.applicationPath & "\Assets\ffmpeg.exe"
  
                  Dim proc_arguments As String = "-ss " & seconds.ToString & " -i """ & FullPathAndFilename & """ -vframes:v 1 -an " & """" & SavePath & """"
  
                  myProcess.StartInfo.Arguments = proc_arguments
  
                  myProcess.Start()
  
                  myProcess.WaitForExit()
  
                  If File.Exists(SavePath) Then Return True
  
              Catch ex As Exception
  
                  Throw ex
  
              Finally
  
                  myProcess.Close()
  
              End Try
  
          End If
  
      End If
  
      Return False
  
  End Function

  I hope this is sufficient information, and appreciated any help or suggestions.

• Libvpx unknown encoder with php exec

  5 juin 2016, par Justin Tullock

  I have centos7 with ffmpeg compiled with libvpx. I can run

  ffmpeg -i gif.gif -c:v libvpx -crf 12 -b:v 500K webm.webm

  which works perfectly but when I try the same command with php exec() it returns this :

  {array(16) { [0]=> string(66) "ffmpeg version 2.6.8 Copyright (c) 2000-2016 
  
  the FFmpeg developers" [1]=> string(55) " built with gcc 4.8.5 (GCC) 
  
  20150623 (Red Hat 4.8.5-4)" [2]=> string(1053) " configuration: --
  
  refix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --
  
  incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --
  
  arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -
  
  fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-
  
  switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-
  
  gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 -
  
  -enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree --
  
  disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame 
  
  --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --
  
  enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora 
  
  --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --
  
  enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --
  
  enable-postproc --enable-pthreads --disable-static --enable-shared --enable-
  
  gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-
  
  runtime-cpudetect" [3]=> string(40) " libavutil 54. 20.100 / 54. 20.100" 
  
  [4]=> string(40) " libavcodec 56. 26.100 / 56. 26.100" [5]=> string(40) " 
  
  libavformat 56. 25.101 / 56. 25.101" [6]=> string(40) " libavdevice 56. 
  
  4.100 / 56. 4.100" [7]=> string(40) " libavfilter 5. 11.102 / 5. 11.102" 
  
  [8]=> string(40) " libavresample 2. 1. 0 / 2. 1. 0" [9]=> string(40) " 
  
  libswscale 3. 1.101 / 3. 1.101" [10]=> string(40) " libswresample 1. 1.100 / 
  
  1. 1.100" [11]=> string(40) " libpostproc 53. 3.100 / 53. 3.100" [12]=> 
  
  string(30) "Input #0, gif, from 'gif.gif':" [13]=> string(29) " Duration: 
  
  N/A, bitrate: N/A" [14]=> string(76) " Stream #0:0: Video: gif, bgra, 
  
  563x307, 25 fps, 25 tbr, 100 tbn, 100 tbc" [15]=> string(24) "Unknown 
  
  encoder 'libvpx'" } int(1)

  ffmpeg -v returns this

  ffmpeg version N-80161-g7e0623b Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  
    configuration: --enable-libvpx
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 44.100 / 57. 44.100
  
    libavformat    57. 37.101 / 57. 37.101
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 46.100 /  6. 46.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101

  What am I missing ?

• x264 Building error - Android

  21 avril 2016, par Jay Parikh

  I am using this repository to build ffmpeg static library which includes x264,libpng and others, please
  visit this link https://github.com/writingminds/ffmpeg-android

  i am using windows 7 as host and ubuntu 15.10 (_64) as guest os using VMware Workstation 12
  and
  Android-ndk-r11b-linux-x86_64

  i do have Prebuilt libraries , but now i want it without PIE support

  i am getting this error in config.log in x264 folder while building
  through

  ./android_build.sh

  here is the log :

  x264 configure script
  
  Command line options: "--cross-prefix=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/arm-linux 
  
  /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-gcc 
  
  
  
  checking whether /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-gcc 
  
  
  
  --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot works... no
  
  
  
   Failed commandline was:
  
  
  
  --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot conftest.c  -Wall -I. -I$(SRCPATH) --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot    --sysroot=/mnt/hgfs/uShare/ffmpeg-android/toolchain-android/sysroot -lm -o conftest
  
  
  
  /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: fatal error:
  
  
  
  conftest: Input/output error
  
  
  
  Failed program was: 
  
  
  
  int main (void) {  return 0; }
  
  
  
  DIED: No working C compiler found.

  ushare is my shared folder between windows and ubuntu

  I have spend almost a week ,trying to solve every error i get.
  these errors are like never ending , 1 solution give 10 more errors
  i have researched a LOT for this library

  thanks a lot in advance.

  Also i thought that x264 library might have poroblem ,so i tried to disable it
  but next library "libpng" also had Same log Error

  i think problem is in Input/output error (obviously)
  this line in log kind of confuses me (those /../../)

  /mnt/hgfs/uShare/ffmpeg-android/toolchain-android/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld : fatal error :

  its like two folder overlaping address...

  thanks a lot in advance.
  please don’t go harsh on me ,its my first time,all thanks to this thing...