Recherche avancée

Sur d’autres sites (6018)

• Installing Opencv on mac with brew link error

  18 mars 2016, par Pieter Bosma

  I am having trouble installing openCV on mac os. ffmpeg was not installed, so I did :

  frew install ffmpeg

  Error : You must ’brew link x264 lame libvo-aacenc xvid’ before ffmpeg can be installed.

  So I did :

  brew link x264 lame libvo-aacenc xvid

  It keeps saying,
  /usr/local/lib/ is not writable.

  I already tried :

  sudo chown -R $USER /usr/local/lib

  still the same error. I am not familiar with Mac os, so any help is welcome !

  When I run :

  brew doctor

  I get the following :

  Please note that these warnings are just used to help the Homebrew maintainers
  with debugging if you file an issue. If everything you use Homebrew for is
  working fine : please don’t worry and just ignore them. Thanks !

  Warning: /usr/local/lib isn't writable.
  
  
  
  This can happen if you "sudo make install" software that isn't managed by
  
  by Homebrew. If a formula tries to write a file to this directory, the
  
  install will fail during the link step.
  
  
  
  You should probably `chown` /usr/local/lib
  
  
  
  Warning: /usr/local/lib/pkgconfig isn't writable.
  
  
  
  This can happen if you "sudo make install" software that isn't managed by
  
  by Homebrew. If a formula tries to write a file to this directory, the
  
  install will fail during the link step.
  
  
  
  You should probably `chown` /usr/local/lib/pkgconfig
  
  
  
  Warning: Broken symlinks were found. Remove them with `brew prune`:
  
    /usr/local/lib/libopencv_calib3d.2.4.dylib
  
    /usr/local/lib/libopencv_calib3d.dylib
  
    /usr/local/lib/libopencv_contrib.2.4.dylib
  
    /usr/local/lib/libopencv_contrib.dylib
  
    /usr/local/lib/libopencv_core.2.4.dylib
  
    /usr/local/lib/libopencv_core.dylib
  
    /usr/local/lib/libopencv_features2d.2.4.dylib
  
    /usr/local/lib/libopencv_features2d.dylib
  
    /usr/local/lib/libopencv_flann.2.4.dylib
  
    /usr/local/lib/libopencv_flann.dylib
  
    /usr/local/lib/libopencv_gpu.2.4.dylib
  
    /usr/local/lib/libopencv_gpu.dylib
  
    /usr/local/lib/libopencv_highgui.2.4.dylib
  
    /usr/local/lib/libopencv_highgui.dylib
  
    /usr/local/lib/libopencv_imgproc.2.4.dylib
  
    /usr/local/lib/libopencv_imgproc.dylib
  
    /usr/local/lib/libopencv_legacy.2.4.dylib
  
    /usr/local/lib/libopencv_legacy.dylib
  
    /usr/local/lib/libopencv_ml.2.4.dylib
  
    /usr/local/lib/libopencv_ml.dylib
  
    /usr/local/lib/libopencv_nonfree.2.4.dylib
  
    /usr/local/lib/libopencv_nonfree.dylib
  
    /usr/local/lib/libopencv_objdetect.2.4.dylib
  
    /usr/local/lib/libopencv_objdetect.dylib
  
    /usr/local/lib/libopencv_ocl.2.4.dylib
  
    /usr/local/lib/libopencv_ocl.dylib
  
    /usr/local/lib/libopencv_photo.2.4.dylib
  
    /usr/local/lib/libopencv_photo.dylib
  
    /usr/local/lib/libopencv_stitching.2.4.dylib
  
    /usr/local/lib/libopencv_stitching.dylib
  
    /usr/local/lib/libopencv_superres.2.4.dylib
  
    /usr/local/lib/libopencv_superres.dylib
  
    /usr/local/lib/libopencv_video.2.4.dylib
  
    /usr/local/lib/libopencv_video.dylib
  
    /usr/local/lib/libopencv_videostab.2.4.dylib
  
    /usr/local/lib/libopencv_videostab.dylib
  
  
  
  Warning: "config" scripts exist outside your system or Homebrew directories.
  
  `./configure` scripts often look for *-config scripts to determine if
  
  software packages are installed, and what additional flags to use when
  
  compiling and linking.
  
  
  
  Having additional scripts in your path can confuse software installed via
  
  Homebrew if the config script overrides a system or Homebrew provided
  
  script of the same name. We found the following "config" scripts:
  
  
  
    /opt/local/bin/curl-config
  
    /opt/local/bin/freetype-config
  
    /opt/local/bin/libpng-config
  
    /opt/local/bin/libpng16-config
  
    /opt/local/bin/ncurses5-config
  
    /opt/local/bin/ncursesw5-config
  
    /opt/local/bin/pkg-config
  
    /opt/local/bin/python2.7-config
  
    /opt/local/bin/sdl-config
  
    /opt/local/bin/xml2-config
  
    /opt/local/bin/xslt-config
  
    /Library/Frameworks/Python.framework/Versions/2.7/bin/python-config
  
    /Library/Frameworks/Python.framework/Versions/2.7/bin/python2-config
  
    /Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config
  
  
  
  Warning: Your XQuartz (2.7.5) is outdated
  
  Please install XQuartz 2.7.7:
  
    https://xquartz.macosforge.org
  
  
  
  Warning: Python is installed at /Library/Frameworks/Python.framework
  
  
  
  Homebrew only supports building against the System-provided Python or a
  
  brewed Python. In particular, Pythons installed to /Library can interfere
  
  with other software installs.
  
  
  
  Warning: You have MacPorts or Fink installed:
  
    /opt/local/bin/port
  
  
  
  This can cause trouble. You don't have to uninstall them, but you may want to
  
  temporarily move them out of the way, e.g.
  
  
  
    sudo mv /opt/local ~/macports
  
  
  
  Warning: Unbrewed dylibs were found in /usr/local/lib.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected dylibs:
  
      /usr/local/lib/libdc1394.22.dylib
  
      /usr/local/lib/libtcl8.6.dylib
  
      /usr/local/lib/libtk8.6.dylib
  
  
  
  Warning: Unbrewed header files were found in /usr/local/include.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected header files:
  
      /usr/local/include/fakemysql.h
  
      /usr/local/include/fakepq.h
  
      /usr/local/include/fakesql.h
  
      /usr/local/include/itcl.h
  
      /usr/local/include/itcl2TclOO.h
  
      /usr/local/include/itclDecls.h
  
      /usr/local/include/itclInt.h
  
      /usr/local/include/itclIntDecls.h
  
      /usr/local/include/itclMigrate2TclCore.h
  
      /usr/local/include/itclTclIntStubsFcn.h
  
      /usr/local/include/mysqlStubs.h
  
      /usr/local/include/odbcStubs.h
  
      /usr/local/include/pqStubs.h
  
      /usr/local/include/tcl.h
  
      /usr/local/include/tclDecls.h
  
      /usr/local/include/tclOO.h
  
      /usr/local/include/tclOODecls.h
  
      /usr/local/include/tclPlatDecls.h
  
      /usr/local/include/tclThread.h
  
      /usr/local/include/tclTomMath.h
  
      /usr/local/include/tclTomMathDecls.h
  
      /usr/local/include/tdbc.h
  
      /usr/local/include/tdbcDecls.h
  
      /usr/local/include/tdbcInt.h
  
      /usr/local/include/tk.h
  
      /usr/local/include/tkDecls.h
  
      /usr/local/include/tkPlatDecls.h
  
  
  
  Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected .pc files:
  
      /usr/local/lib/pkgconfig/tcl.pc
  
      /usr/local/lib/pkgconfig/tk.pc
  
  
  
  Warning: Unbrewed static libraries were found in /usr/local/lib.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected static libraries:
  
      /usr/local/lib/libtclstub8.6.a
  
      /usr/local/lib/libtkstub8.6.a
  
  
  
  Warning: You have unlinked kegs in your Cellar
  
  Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
  
  those kegs to fail to run properly once built. Run `brew link` on these:
  
  
  
      apple-gcc42
  
      eigen
  
      gcc
  
      gdbm
  
      gmp
  
      isl
  
      jpeg
  
      lame
  
      libmpc
  
      libvo-aacenc
  
      mpfr
  
      python
  
      x264
  
      xvid
  
  
  
  Warning: Some installed formula are missing dependencies.
  
  You should `brew install` the missing dependencies:
  
  
  
      brew install libxml2
  
  
  
  Run `brew missing` for more details.
  
  
  
  Warning: You have a non-Homebrew 'pkg-config' in your PATH:
  
    /opt/local/bin/pkg-config
  
  
  
  `./configure` may have problems finding brew-installed packages using
  
  this other pkg-config.

• Running FFMpeg on the server (to save the user from waiting)

  26 juin 2013, par Tom

  I have made a simple page that lets a user upload videoes for then to display all the videoes uploaded using the HTML5 <video></video> tags. But to provide the user with full browser support I need to transcode all the videoes that are being uploaded into a few new formats. The problem is then that now I am transcoding all vidoes into two different formats, which in turn takes a long time and it makes the user have to wait for the video being transcoded. Is there a simple way that anyone know of that lets me run this script in "the background" so that the user experience is in no way being compromised with long wait times ?

  I am running the FFMpeg scripts using PHP with the exec command.

• Imagemagick transitions between multiple images — need idea

  5 juillet 2015, par user3650185

  I am using Fred’s Imagemagick scripts, particularly, fxtransitions to create a transition effect between two images. I am creating jpeg image frames. Later, I will use ffmpeg to turn them into video. It is my third day with Imagemagick and currently I can successfully apply the transition effect between two images with the following script. However, I also need to meet two following criteria :

  $result = shell_exec("bash /cygdrive/path/to/fxtransitions -e  explode -f 50 -d 1 -p 1 -r first.jpg second.jpg output.jpg"); 
  
  echo $result;

  1. Each image must stay for some 9 seconds without distortion and then quickly transforms into the next image.

  2. Currently, Fred’s script allows two image inputs. Is it possible to use more than two images within the script ? How can I loop through multiple images with php ?