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• Compile OpenCV3 with Cuda7.5 ffmpeg (latest) issue OpenSUSE 13.2

  23 janvier 2016, par Ingeborg

  I am using an OpenSUSE 13.2-X86-64 and a Geforce 940M GPU. I want to work with it on the Qt5 IDE.
  For this purpose, i have installed my GPU Driver with the Cuda7.5 toolkit rpm from the cudazone. Everything is nearly fine.
  It detects everything I have made and executed a couple of the cuda samples.

  As next step, i have installed the current FFmpeg version with nvenc and other libraries like Xvid and many of
  the other usefull stuff which would be to much to list it here. After that i have downloaded the current
  OpenCV-3.0.0 source code and ran cmake-gui where i have added cuda, ffmpeg, Qt5 etc and maked it.

  On different points of the make session (make -j4) i get this kind of mistake from my console (The list of the Multiple definition
  error is much longer). This is the first one.

  .
  
  .
  
  .
  
  .
  
  .
  
  .
  
  nvlink error   : Multiple definition of '_ZN2cv5cudev16color_cvt_detail15c_HlsSectorDataE' in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_arithm_func.cu.o', first defined in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_lut.cu.o'
  
  nvlink error   : Multiple definition of '_ZN2cv5cudev16color_cvt_detail16c_sRGBGammaTab_bE' in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_arithm_func.cu.o', first defined in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_lut.cu.o'
  
  nvlink error   : Multiple definition of '_ZN2cv5cudev16color_cvt_detail14c_sRGBGammaTabE' in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_arithm_func.cu.o', first defined in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_lut.cu.o'
  
  nvlink error   : Multiple definition of '_ZN2cv5cudev16color_cvt_detail17c_sRGBInvGammaTabE' in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_arithm_func.cu.o', first defined in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_lut.cu.o'
  
  nvlink error   : Multiple definition of '_ZN2cv5cudev16color_cvt_detail12c_LabCbrtTabE' in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_arithm_func.cu.o', first defined in '/home/peter/Programme/opencv/build/modules/cudev/test/CMakeFiles/opencv_test_cudev.dir//./opencv_test_cudev_generated_test_lut.cu.o'
  
  modules/cudev/test/CMakeFiles/opencv_test_cudev.dir/build.make:5302: recipe for target 'modules/cudev/test/CMakeFiles/opencv_test_cudev.dir/./opencv_test_cudev_intermediate_link.o' failed
  
  make[2]: *** [modules/cudev/test/CMakeFiles/opencv_test_cudev.dir/./opencv_test_cudev_intermediate_link.o] Error 255
  
  CMakeFiles/Makefile2:1182: recipe for target 'modules/cudev/test/CMakeFiles/opencv_test_cudev.dir/all' failed
  
  make[1]: *** [modules/cudev/test/CMakeFiles/opencv_test_cudev.dir/all] Error 2
  
  Makefile:137: recipe for target 'all' failed
  
  make: *** [all] Error 2

  And I have no idea how to fix that.

  Thx !

  Edit : added cmake configuration

  ~/Programme/opencv/build> cmake /home/peter/Programme/opencv-3.0.0
  
  CMake Error: The source "/home/peter/Programme/opencv-3.0.0/CMakeLists.txt" does not match the source "/home/peter/Programme/opencv/CMakeLists.txt" used to generate cache.  Re-run cmake with a different source directory.
  
  peter@linux-3mgc:~/Programme/opencv/build> cmake /home/peter/Programme/opencv
  
  -- Detected version of GNU GCC: 48 (408)
  
  -- Found ZLIB: /usr/lib64/libz.so (found suitable version "1.2.8", minimum required is "1.2.3") 
  
  -- Found ZLIB: /usr/lib64/libz.so (found version "1.2.8") 
  
  -- checking for module 'gstreamer-video-0.10'
  
  --   package 'gstreamer-video-0.10' not found
  
  -- checking for module 'gstreamer-app-0.10'
  
  --   package 'gstreamer-app-0.10' not found
  
  -- checking for module 'gstreamer-riff-0.10'
  
  --   package 'gstreamer-riff-0.10' not found
  
  -- checking for module 'gstreamer-pbutils-0.10'
  
  --   package 'gstreamer-pbutils-0.10' not found
  
  -- Looking for linux/videodev.h
  
  -- Looking for linux/videodev.h - not found
  
  -- Looking for linux/videodev2.h
  
  -- Looking for linux/videodev2.h - found
  
  -- Looking for sys/videoio.h
  
  -- Looking for sys/videoio.h - not found
  
  -- checking for module 'libavresample'
  
  --   package 'libavresample' not found
  
  -- Looking for libavformat/avformat.h 
  
  -- Looking for libavformat/avformat.h - found
  
  -- Looking for ffmpeg/avformat.h
  
  -- Looking for ffmpeg/avformat.h - not found
  
  -- found IPP (ICV version): 8.2.1 [8.2.1]
  
  -- at: /home/peter/Programme/opencv/3rdparty/ippicv/unpack/ippicv_lnx
  
  -- CUDA detected: 7.5
  
  -- CUDA NVCC target flags: -gencode;arch=compute_50,code=sm_50
  
  -- To enable PlantUML support, set PLANTUML_JAR environment variable or pass -DPLANTUML_JAR=<filepath> option to cmake
  
  -- Found PythonInterp: /usr/bin/python2.7 (found suitable version "2.7.8", minimum required is "2.7") 
  
  -- Found PythonLibs: /usr/lib64/libpython2.7.so (found suitable exact version "2.7.8") 
  
  -- Found PythonInterp: /usr/bin/python3.4 (found suitable version "3.4.1", minimum required is "3.4") 
  
  -- Found PythonLibs: /usr/lib64/libpython3.4m.so (found suitable exact version "3.4.1") 
  
  Traceback (most recent call last):
  
  File "<string>", line 1, in <module>
  
  ImportError: No module named 'numpy'
  
  -- Found apache ant 1.8.0: /usr/bin/ant
  
  -- Could NOT find JNI (missing:  JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) 
  
  -- Could NOT find Matlab (missing:  MATLAB_MEX_SCRIPT      MATLAB_INCLUDE_DIRS MATLAB_ROOT_DIR MATLAB_LIBRARIES MATLAB_LIBRARY_DIRS MATLAB_MEXEXT MATLAB_ARCH MATLAB_BIN) 
  
  -- VTK support is disabled. Incompatible combination: OpenCV + Qt5 and VTK ver.6.1.0 + Qt4
  
  -- 
  
  -- General configuration for OpenCV 3.0.0-dev =====================================
  
  --   Version control:               3.0.0-528-g3a3f403-dirty
  
  -- 
  
  --   Platform:
  
  --     Host:                        Linux 3.16.7-24-desktop x86_64
  
  --     CMake:                       3.0.2
  
  --     CMake generator:             Unix Makefiles
  
  --     CMake build tool:            /usr/bin/gmake
  
  --     Configuration:               Release
  
  -- 
  
  --   C/C++:
  
  --     Built as dynamic libs?:      YES
  
  --     C++ Compiler:                /usr/bin/c++  (ver 4.8.3)
  
  --     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -O3 -DNDEBUG  -DNDEBUG
  
  --     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -g  -O0 -DDEBUG -D_DEBUG
  
  --     C Compiler:                  /usr/bin/cc
  
  --     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fopenmp -O3 -DNDEBUG  -DNDEBUG
  
  --     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fopenmp -g  -O0 -DDEBUG -D_DEBUG
  
  --     Linker flags (Release):      
  
  --     Linker flags (Debug):        
  
  --     Precompiled headers:         YES
  
  --     Extra dependencies:          /usr/lib64/libcuda.so /usr/lib64/libnvcuvid.so Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Test Qt5::Concurrent Qt5::OpenGL /usr/lib64/libwebp.so /usr/lib64/libpng.so /usr/lib64/libz.so /usr/lib64/libtiff.so /usr/lib64/libjasper.so /usr/lib64/libjpeg.so gstbase-0.10 gstreamer-0.10 gobject-2.0 gmodule-2.0 gthread-2.0 xml2 ucil glib-2.0 unicap dc1394 xine v4l1 v4l2 avcodec avformat avutil swscale gphoto2 gphoto2_port exif /usr/lib64/libbz2.so dl m pthread rt /usr/lib64/libGLU.so /usr/lib64/libGL.so /usr/lib64/libSM.so /usr/lib64/libICE.so /usr/lib64/libX11.so /usr/lib64/libXext.so cudart nppc nppi npps cublas cufft
  
  --     3rdparty dependencies:       IlmImf ippicv
  
  -- 
  
  --   OpenCV modules:
  
  --     To be built:                 cudev hal core cudaarithm flann imgproc ml video cudabgsegm cudafilters cudaimgproc cudawarping imgcodecs photo shape videoio cudacodec highgui objdetect ts features2d calib3d cudafeatures2d cudalegacy cudaobjdetect cudaoptflow cudastereo stitching superres videostab python2
  
  --     Disabled:                    world
  
  --     Disabled by dependency:      -
  
  --     Unavailable:                 java python3 viz
  
  -- 
  
  --   GUI: 
  
  --     QT 5.x:                      YES (ver 5.4.2)
  
  --     QT OpenGL support:           YES (Qt5::OpenGL 5.4.2)
  
  --     OpenGL support:              YES (/usr/lib64/libGLU.so /usr/lib64/libGL.so /usr/lib64/libSM.so /usr/lib64/libICE.so /usr/lib64/libX11.so /usr/lib64/libXext.so)
  
  --     VTK support:                 NO
  
  -- 
  
  --   Media I/O: 
  
  --     ZLib:                        /usr/lib64/libz.so (ver 1.2.8)
  
  --     JPEG:                        /usr/lib64/libjpeg.so (ver )
  
  --     WEBP:                        /usr/lib64/libwebp.so (ver encoder: 0x0202)
  
  --     PNG:                         /usr/lib64/libpng.so (ver 1.2.51)
  
  --     TIFF:                        /usr/lib64/libtiff.so (ver 42 - 4.0.4)
  
  --     JPEG 2000:                   /usr/lib64/libjasper.so (ver 1.900.1)
  
  --     OpenEXR:                     build (ver 1.7.1)
  
  --     GDAL:                        NO
  
  -- 
  
  --   Video I/O:
  
  --     DC1394 1.x:                  NO
  
  --     DC1394 2.x:                  YES (ver 2.2.2)
  
  --     FFMPEG:                      YES
  
  --       codec:                     YES (ver 57.3.100)
  
  --       format:                    YES (ver 57.2.100)
  
  --       util:                      YES (ver 55.2.100)
  
  --       swscale:                   YES (ver 4.0.100)
  
  --       resample:                  NO
  
  --       gentoo-style:              YES
  
  --     GStreamer:                   NO
  
  --     OpenNI:                      NO
  
  --     OpenNI PrimeSensor Modules:  NO
  
  --     OpenNI2:                     NO
  
  --     PvAPI:                       NO
  
  --     GigEVisionSDK:               NO
  
  --     UniCap:                      YES (ver 0.9.12)
  
  --     UniCap ucil:                 YES (ver 0.9.10)
  
  --     V4L/V4L2:                    Using libv4l1 (ver 1.2.1) / libv4l2 (ver 1.2.1)
  
  --     XIMEA:                       NO
  
  --     Xine:                        YES (ver 1.2.6)
  
  --     gPhoto2:                     YES
  
  -- 
  
  --   Parallel framework:            OpenMP
  
  -- 
  
  --   Other third-party libraries:
  
  --     Use IPP:                     8.2.1 [8.2.1]
  
  --          at:                     /home/peter/Programme/opencv/3rdparty/ippicv/unpack/ippicv_lnx
  
  --     Use IPP Async:               NO
  
  --     Use VA:                      NO
  
  --     Use Intel VA-API/OpenCL:     NO
  
  --     Use Eigen:                   YES (ver 3.2.2)
  
  --     Use Cuda:                    YES (ver 7.5)
  
  --     Use OpenCL:                  YES
  
  -- 
  
  --   NVIDIA CUDA
  
  --     Use CUFFT:                   YES
  
  --     Use CUBLAS:                  YES
  
  --     USE NVCUVID:                 YES
  
  --     NVIDIA GPU arch:             50
  
  --     NVIDIA PTX archs:
  
  --     Use fast math:               YES
  
  -- 
  
  --   OpenCL:
  
  --     Version:                     dynamic
  
  --     Include path:                /home/peter/Programme/opencv/3rdparty/include/opencl/1.2
  
  --     Use AMDFFT:                  NO
  
  --     Use AMDBLAS:                 NO
  
  -- 
  
  --   Python 2:
  
  --     Interpreter:                 /usr/bin/python2.7 (ver 2.7.8)
  
  --     Libraries:                   /usr/lib64/libpython2.7.so (ver 2.7.8)
  
  --     numpy:                       /usr/lib64/python2.7/site-packages/numpy/core/include (ver 1.9.0)
  
  --     packages path:               lib/python2.7/site-packages
  
  -- 
  
  --   Python 3:
  
  --     Interpreter:                 /usr/bin/python3.4 (ver 3.4.1)
  
  -- 
  
  --   Python (for build):            /usr/bin/python2.7
  
  -- 
  
  --   Java:
  
  --     ant:                         /usr/bin/ant (ver 1.8.0)
  
  --     JNI:                         NO
  
  --     Java wrappers:               NO
  
  --     Java tests:                  NO
  
  -- 
  
  --   Matlab:
  
  --     mex:                         NO
  
  -- 
  
  --   Documentation:
  
  --     Doxygen:                     /usr/bin/doxygen (ver 1.8.8)
  
  --     PlantUML:                    NO
  
  -- 
  
  --   Tests and samples:
  
  --     Tests:                       YES
  
  --     Performance tests:           YES
  
  --     C/C++ Examples:              NO
  
  -- 
  
  --   Install path:                  /usr/local
  
  -- 
  
  --   cvconfig.h is in:              /home/peter/Programme/opencv/build
  
  --        
  
  -----------------------------------------------------------------
  
  -- 
  
  -- Configuring done
  
  -- Generating done
  
  -- Build files have been written to: /home/peter/Programme/opencv/build
  
  </module></string></filepath>

• Saving the openGL context as a video output

  16 septembre 2016, par activatedgeek

  I am currently trying to save the animation made in openGL to a video file. I have tried using openCV’s videowriter but to no advantage. I have successfully been able to generate a snapshot and save it as bmp using the SDL library. If I save all snapshots and then generate the video using ffmpeg, that is like collecting 4 GB worth of images. Not practical.
  How can I write video frames directly during rendering ?
  Here the code i use to take snapshots when I require :

  void snapshot(){
  
  SDL_Surface* snap = SDL_CreateRGBSurface(SDL_SWSURFACE,WIDTH,HEIGHT,24, 0x000000FF, 0x0000FF00, 0x00FF0000, 0);
  
  char * pixels = new char [3 *WIDTH * HEIGHT];
  
  glReadPixels(0, 0,WIDTH, HEIGHT, GL_RGB, GL_UNSIGNED_BYTE, pixels);
  
  
  
  for (int i = 0 ; i <height>pixels) + snap->pitch * i, pixels + 3 * WIDTH * (HEIGHT-i - 1), WIDTH*3 );
  
  
  
  delete [] pixels;
  
  SDL_SaveBMP(snap, "snapshot.bmp");
  
  SDL_FreeSurface(snap);
  
  }
  
  </height>

  I need the video output. I have discovered that ffmpeg can be used to create videos from C++ code but have not been able to figure out the process. Please help !

  EDIT : I have tried using openCV CvVideoWriter class but the program crashes ("segmentation fault") the moment it is declared.Compilation shows no errors ofcourse. Any suggestions to that ?

  SOLUTION FOR PYTHON USERS (Requires Python2.7,python-imaging,python-opengl,python-opencv, codecs of format you want to write to, I am on Ubuntu 14.04 64-bit) :

  def snap():
  
      pixels=[]
  
      screenshot = glReadPixels(0,0,W,H,GL_RGBA,GL_UNSIGNED_BYTE)
  
      snapshot = Image.frombuffer("RGBA",W,H),screenshot,"raw","RGBA",0,0)
  
      snapshot.save(os.path.dirname(videoPath) + "/temp.jpg")
  
      load = cv2.cv.LoadImage(os.path.dirname(videoPath) + "/temp.jpg")
  
      cv2.cv.WriteFrame(videoWriter,load)

  Here W and H are the window dimensions (width,height). What is happening is I am using PIL to convert the raw pixels read from the glReadPixels command into a JPEG image. I am loading that JPEG into the openCV image and writing to the videowriter. I was having certain issues by directly using the PIL image into the videowriter (which would save millions of clock cycles of I/O), but right now I am not working on that. Image is a PIL module cv2 is a python-opencv module.

• Auto install FFMPEG on Google Compute Engine (Debian Wheezy 7.8)

  1er octobre 2015, par DynamoBooster

  I have a Google Cloud Compute Engine project and want to auto-install FFMPEG on all the instances. I am using the node.js module https://github.com/fluent-ffmpeg/node-fluent-ffmpeg to watermark videos uploaded to the server and generate thumbnails. It’s working perfectly fine on my local machine that has ffmpeg installed. But how do I install/auto install ffmpeg on all virtual machine instances in the google cloud project ?