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• I can't seem to install opencv2.4.13 for Python3.4 on Mac El Capitan

  11 décembre 2020, par user4351838

  I have already tried : https://www.youtube.com/watch?v=U49CVY8yOxw.

  


  So I download opencv2.4.13, create the build folder, open cmake, configure, generate and then go to terminal and type in make.

  


  I get this :

  


  Richie's Macbook Air:build Richie$ make
[  2%] Built target zlib
[  6%] Built target libtiff
[ 10%] Built target libjpeg
[ 14%] Built target libjasper
[ 16%] Built target libpng
[ 23%] Built target IlmImf
[ 26%] Built target opencv_core
[ 31%] Built target opencv_imgproc
[ 32%] Built target opencv_video
[ 32%] Built target opencv_flann
[ 32%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o
In file included from /Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg.cpp:45:
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:71:6: error: 
      "libswscale is necessary to build the newer OpenCV ffmpeg wrapper"
    #error "libswscale is necessary to build the newer OpenCV ffmpeg wrapper"
     ^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:481:9: error: 
      use of undeclared identifier 'sws_freeContext'
        sws_freeContext(img_convert_ctx);
        ^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:965:17: error: 
      use of undeclared identifier 'SWS_BICUBIC'
                SWS_BICUBIC,
                ^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:998:5: error: 
      use of undeclared identifier 'sws_scale'
    sws_scale(
    ^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1639:46: error: 
      use of undeclared identifier 'SWS_BICUBIC'
                                             SWS_BICUBIC,
                                             ^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1645:14: error: 
      use of undeclared identifier 'sws_scale'
        if ( sws_scale(img_convert_ctx, input_picture->data,
             ^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1693:9: error: 
      use of undeclared identifier 'sws_freeContext'
        sws_freeContext(img_convert_ctx);
        ^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:2290:9: warning: 
      ignoring return value of function declared with warn_unused_result
      attribute [-Wunused-result]
        avformat_write_header(oc_, NULL);
        ^~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~
1 warning and 7 errors generated.
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o] Error 1
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
make: *** [all] Error 2
Richie's Macbook Air:build Richie$ 


  


  From what I can see, it says

  


  "libswscale is necessary to build the newer OpenCV ffmpeg wrapper"


  


  I do have ffmpeg installed (using brew). Does anyone know ?

  


• License or not ? As website owner do i have to pay license for using ffmpeg (x264) -> mp4 decoding in my webiste ?

  28 août 2014, par linderman

  I am very confused about my legal or illegal rights to use H.264 mp4 file.

  I had long time reading various websites about should i pay license or not ... still cant understand ..

  So here is the exact situation :

  I have website , where users can upload their videos. Videos are taken with their smart-phones or home cameras , or webcam etc.

  After they upload their videos , i am using FFMPEG (x264) to convert the video from 3gp, mov, or even "mp4 to mp4".

  Then other users can watch these decoded videos on my website.

  I am not charging the end users anything. My website is free for uploaders and viewers.

  You will be right if you say that my website have the same purpose as youtube - and you will be right.. video sharing !

  So ME - as website owner , hosting buyer and ffmpeg user ... should i have to pay license ? OR ABANDON THE MP4 decoding in my website ?

  Thank you

• PARADISEC catalog for Administrators

  2 juillet, par silvia

  Screencast of how a PARADISEC administrator uses the PARADISEC catalog for managing the consistency of metadata and staying on top of uploaded files.

  Category : 2
  Uploaded by : Silvia Pfeiffer
  Hosted : youtube

  The post PARADISEC catalog for Administrators first appeared on ginger’s thoughts.