Я пытаюсь использовать OpenCV3 для чтения видеофайлов.
string packageRootPath = ros::package::getPath("visensor_dgem");
string videoFullPath = packageRootPath + "/dump/Video.avi";
cout << videoFullPath << endl;
cv::VideoCapture cap;
bool flag = cap.open( videoFullPath );
if( flag )
cout << "flag true\n";
else
cout << "flag false\n";
Путь к видеофайлу правильный. Я предполагаю, что моя проблема связана с видеокодеками. Программа компилирует файл, однако когда я запускаю код, я получаю flag false. Я попытался открыть файл с помощью fstream, и он успешно открылся, поэтому я уверен в пути, разрешениях и т. д.
У меня убунту 14.04. Я установил opencv3 из исходного кода. Вот конфигурация моего opencv: (более подробная информация о моей установке здесь: https://kusemanohar.wordpress.com/2015/10/23/opencv-pro-built/)
-- General configuration for OpenCV 3.0.0 =====================================
-- Version control: unknown
--
-- Platform:
-- Host: Linux 3.19.0-25-generic x86_64
-- CMake: 2.8.12.2
-- CMake generator: Unix Makefiles
-- CMake build tool: /usr/bin/make
-- Configuration: RELEASE
--
-- C/C++:
-- Built as dynamic libs?: YES
-- C++ Compiler: /usr/bin/c++ (ver 4.8.4)
-- 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 -ffast-math -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 -ffast-math -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 -ffast-math -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 -ffast-math -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: Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Test Qt5::Concurrent /usr/lib/x86_64-linux-gnu/libwebp.so /usr/lib/x86_64-linux-gnu/libpng.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libtiff.so /usr/lib/x86_64-linux-gnu/libjasper.so /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so dc1394 avcodec avformat avutil swscale /usr/lib/x86_64-linux-gnu/libbz2.so vtkCharts vtkCommon vtkFiltering vtkGenericFiltering vtkGeovis vtkGraphics vtkHybrid vtkIO vtkImaging vtkInfovis vtkParallel vtkRendering vtkViews vtkVolumeRendering vtkWidgets dl m pthread rt tbb cudart nppc nppi npps cufft
-- 3rdparty dependencies: ippicv
--
-- OpenCV modules:
-- To be built: hal cudev core cudaarithm flann imgproc ml video viz cudabgsegm cudafilters cudaimgproc cudawarping imgcodecs photo shape videoio cudacodec highgui objdetect ts features2d calib3d cudafeatures2d cudalegacy cudaobjdetect cudaoptflow cudastereo stitching superres videostab
-- Disabled: world
-- Disabled by dependency: -
-- Unavailable: java python2 python3
--
-- GUI:
-- QT 5.x: YES (ver 5.2.1)
-- QT OpenGL support: NO
-- OpenGL support: NO
-- VTK support: YES (ver 5.8.0)
--
-- Media I/O:
-- ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
-- JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
-- WEBP: /usr/lib/x86_64-linux-gnu/libwebp.so (ver encoder: 0x0202)
-- PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
-- TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
-- JPEG 2000: /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
-- OpenEXR: /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)
-- GDAL: NO
--
-- Video I/O:
-- DC1394 1.x: NO
-- DC1394 2.x: YES (ver 2.2.1)
-- FFMPEG: YES
-- codec: YES (ver 54.35.0)
-- format: YES (ver 54.20.4)
-- util: YES (ver 52.3.0)
-- swscale: YES (ver 2.1.1)
-- resample: NO
-- gentoo-style: YES
-- GStreamer: NO
-- OpenNI: NO
-- OpenNI PrimeSensor Modules: NO
-- OpenNI2: NO
-- PvAPI: NO
-- GigEVisionSDK: NO
-- UniCap: NO
-- UniCap ucil: NO
-- V4L/V4L2: NO/YES
-- XIMEA: NO
-- Xine: NO
-- gPhoto2: NO
--
-- Other third-party libraries:
-- Use IPP: 8.2.1 [8.2.1]
-- at: /home/mpkusex/Downloads/opencv-3.0.0/3rdparty/ippicv/unpack/ippicv_lnx
-- Use IPP Async: NO
-- Use Eigen: YES (ver 3.2.6)
-- Use TBB: YES (ver 4.2 interface 7000)
-- Use OpenMP: YES
-- Use GCD NO
-- Use Concurrency NO
-- Use C=: NO
-- Use pthreads for parallel for:
-- NO
-- Use Cuda: YES (ver 7.5)
-- Use OpenCL: YES
--
-- NVIDIA CUDA
-- Use CUFFT: YES
-- Use CUBLAS: NO
-- USE NVCUVID: NO
-- NVIDIA GPU arch: 20 21 30 35
-- NVIDIA PTX archs: 30
-- Use fast math: NO
--
-- OpenCL:
-- Version: dynamic
-- Include path: /home/mpkusex/Downloads/opencv-3.0.0/3rdparty/include/opencl/1.2
-- Use AMDFFT: NO
-- Use AMDBLAS: NO
--
-- Python 2:
-- Interpreter: /usr/bin/python2.7 (ver 2.7.6)
--
-- Python 3:
-- Interpreter: /usr/bin/python3.4 (ver 3.4)
--
-- Python (for build): /usr/bin/python2.7
--
-- Java:
-- ant: NO
-- JNI: NO
-- Java wrappers: NO
-- Java tests: NO
--
-- Matlab:
-- mex: NO
--
-- Documentation:
-- Doxygen: /usr/bin/doxygen (ver 1.8.6)
-- PlantUML: NO
--
-- Tests and samples:
-- Tests: YES
-- Performance tests: YES
-- C/C++ Examples: YES
--
-- Install path: /usr/local
--
-- cvconfig.h is in: /home/mpkusex/Downloads/opencv-3.0.0/build
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done
-- Build files have been written to: /home/mpkusex/Downloads/opencv-3.0.0/buil
Соответствующий раздел моего CMakeLists.txt. Я использую opencv с сережкой (ros-ros.org), которая по сути такая же, как cmake. Я могу запускать другие свои вещи opencv, такие как обнаружение краев, чтение изображений и т. д.
cmake_minimum_required(VERSION 2.8.3)
project(visensor_dgem)
## Find catkin macros and libraries
## if COMPONENTS list like find_package(catkin REQUIRED COMPONENTS xyz)
## is used, also find other catkin packages
find_package(catkin REQUIRED COMPONENTS
cv_bridge
image_transport
roscpp
tf
message_generation
)
find_package( message_generation )
find_package( OpenCV 3.0 REQUIRED COMPONENTS core highgui flann calib3d video )
add_executable( videoReader
src/videoReader.cpp
)
target_link_libraries( videoReader
${Boost_THREAD_LIBRARY}
${catkin_LIBRARIES}
)
Как я могу решить эту проблему?
