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• Install ffmpeg on Centos6 x64 using FFmpegInstaller 8.0 Issue [on hold]

  21 mars 2017, par woshka

  I have the following issue while installing ffmpeginstaller8.0 on centos 6 x64
  on the mplayer installtion it fails as followes on cpu.c
  what is the issue and how to solve it ?

  Thanks

  EDIT : I have found the best solution to install ffmpeg and all of it’s libraries with this link enter link description here

  YASM    libavcodec/x86/vp9lpf_16bpp.o
  
  YASM    libavcodec/x86/vp9itxfm_16bpp.o
  
  YASM    libavcodec/x86/vp9lpf.o
  
  YASM    libavcodec/x86/hevc_mc.o
  
  YASM    libavcodec/x86/vp9itxfm.o
  
  AR      libavcodec/libavcodec.a
  
  make[1]: Leaving directory `/usr/src/ffmpegscript/mplayer/ffmpeg'
  
  make -C ffmpeg libavutil/libavutil.a
  
  make[1]: Entering directory `/usr/src/ffmpegscript/mplayer/ffmpeg'
  
  CC      libavutil/cpu.o
  
  libavutil/cpu.c:20:23: warning: stdatomic.h: No such file or directory
  
  libavutil/cpu.c:28:5: warning: "HAVE_SCHED_GETAFFINITY" is not defined
  
  libavutil/cpu.c:34:5: warning: "HAVE_GETPROCESSAFFINITYMASK" is not defined
  
  libavutil/cpu.c:34:36: warning: "HAVE_WINRT" is not defined
  
  libavutil/cpu.c:37:5: warning: "HAVE_SYSCTL" is not defined
  
  libavutil/cpu.c:48: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'cpu_flags'
  
  libavutil/cpu.c: In function 'av_force_cpu_flags':
  
  libavutil/cpu.c:86: error: implicit declaration of function 'atomic_store_explicit'
  
  libavutil/cpu.c:86: error: 'cpu_flags' undeclared (first use in this function)
  
  libavutil/cpu.c:86: error: (Each undeclared identifier is reported only once
  
  libavutil/cpu.c:86: error: for each function it appears in.)
  
  libavutil/cpu.c:86: error: 'memory_order_relaxed' undeclared (first use in this function)
  
  libavutil/cpu.c: In function 'av_get_cpu_flags':
  
  libavutil/cpu.c:91: error: implicit declaration of function 'atomic_load_explicit'
  
  libavutil/cpu.c:91: error: 'cpu_flags' undeclared (first use in this function)
  
  libavutil/cpu.c:91: error: 'memory_order_relaxed' undeclared (first use in this function)
  
  libavutil/cpu.c: In function 'av_set_cpu_flags_mask':
  
  libavutil/cpu.c:101: error: 'cpu_flags' undeclared (first use in this function)
  
  libavutil/cpu.c:102: error: 'memory_order_relaxed' undeclared (first use in this function)
  
  libavutil/cpu.c:265:5: warning: "HAVE_WINRT" is not defined
  
  libavutil/cpu.c:268:5: warning: "HAVE_SCHED_GETAFFINITY" is not defined
  
  libavutil/cpu.c:275:7: warning: "HAVE_GETPROCESSAFFINITYMASK" is not defined
  
  libavutil/cpu.c:279:7: warning: "HAVE_SYSCTL" is not defined
  
  libavutil/cpu.c:285:7: warning: "HAVE_SYSCONF" is not defined
  
  libavutil/cpu.c:287:7: warning: "HAVE_SYSCONF" is not defined
  
  libavutil/cpu.c:289:7: warning: "HAVE_WINRT" is not defined
  
  make[1]: *** [libavutil/cpu.o] Error 1
  
  make[1]: Leaving directory `/usr/src/ffmpegscript/mplayer/ffmpeg'
  
  make: *** [ffmpeg/libavutil/libavutil.a] Error 2
  
  cp: cannot create regular file `/usr/local/cpffmpeg/etc/mplayer/codecs.conf': No such file or directory
  
  Installation of mplayer.tar.gz ....... Completed
  
  
  
  
  
     Mplayer installation Failed :( ,  please contact  professional support sales@syslint.com

• How to extract orientation information from videos ?

  23 décembre 2016, par Sid

  After surfing through tons of documentation on the web it seems that the iPhone always shoots the video at a 480x360 aspect ratio and applies a transformation matrix on the video track. (480x360 may change but its always the same for a given device)

  Here is a way of modifying the ffmpeg source within a iOS project and accessing the matrix http://www.seqoy.com/correct-orientation-for-iphone-recorded-movies-with-ffmpeg/

  Here is a cleaner way of finding the transformation matrix in iOS-4
  how to detect (iphone sdk) if a video file was recorded in portrait orientation, or landscape

  How can the orientation of the video be extracted in either of the options below -
  
   iOS 3.2
  
   ffmpeg (through the command line server side)
  
   ruby
  

  Any help will be appreciated.

• Revision 36914 : On affiche si ffmpeg-php est correctement installé avec quelques ...

  4 avril 2010, par kent1@… — Log

  On affiche si ffmpeg-php est correctement installé avec quelques information sur son installation
  les options de taille et de audiorate ne marchent pas dans les pressets de ffmpeg ... on doit les laisser dans la ligne de commande du script
  On ajoute deux filtres pour les codecs issus des métadatas des flv