Takes a video and plays it back frame by frame while inverting the image (colors)

This commit is contained in:
mmcwilliams 2023-02-05 18:44:21 -05:00
commit 097969a3e7
5 changed files with 304 additions and 0 deletions

2
.gitignore vendored Normal file
View File

@ -0,0 +1,2 @@
build/
*.DS_Store

17
CMakeLists.txt Normal file
View File

@ -0,0 +1,17 @@
cmake_minimum_required(VERSION 3.1)
PROJECT (video_example)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake-modules)
find_package(OpenCV HINTS /usr/local/opt/opencv /usr/local/Cellar/opencv REQUIRED)
set( NAME_SRC
video_example.cpp
)
INCLUDE_DIRECTORIES( ${CMAKE_CURRENT_SOURCE_DIR}/include )
link_directories( ${CMAKE_BINARY_DIR}/bin)
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
add_executable( video_example ${NAME_SRC} ${NAME_HEADERS} )
target_link_libraries( video_example ${OpenCV_LIBS} )

View File

@ -0,0 +1,173 @@
# ===================================================================================
# The OpenCV CMake configuration file
#
# ** File generated automatically, do not modify **
#
# Usage from an external project:
# In your CMakeLists.txt, add these lines:
#
# FIND_PACKAGE(OpenCV REQUIRED)
# TARGET_LINK_LIBRARIES(MY_TARGET_NAME ${OpenCV_LIBS})
#
# Or you can search for specific OpenCV modules:
#
# FIND_PACKAGE(OpenCV REQUIRED core imgcodecs)
#
# If the module is found then OPENCV_<MODULE>_FOUND is set to TRUE.
#
# This file will define the following variables:
# - OpenCV_LIBS : The list of libraries to link against.
# - OpenCV_LIB_DIR : The directory(es) where lib files are. Calling LINK_DIRECTORIES
# with this path is NOT needed.
# - OpenCV_INCLUDE_DIRS : The OpenCV include directories.
# - OpenCV_COMPUTE_CAPABILITIES : The version of compute capability
# - OpenCV_ANDROID_NATIVE_API_LEVEL : Minimum required level of Android API
# - OpenCV_VERSION : The version of this OpenCV build. Example: "2.4.0"
# - OpenCV_VERSION_MAJOR : Major version part of OpenCV_VERSION. Example: "2"
# - OpenCV_VERSION_MINOR : Minor version part of OpenCV_VERSION. Example: "4"
# - OpenCV_VERSION_PATCH : Patch version part of OpenCV_VERSION. Example: "0"
#
# Advanced variables:
# - OpenCV_SHARED
# - OpenCV_CONFIG_PATH
# - OpenCV_LIB_COMPONENTS
#
# ===================================================================================
#
# Windows pack specific options:
# - OpenCV_STATIC
# - OpenCV_CUDA
if(CMAKE_VERSION VERSION_GREATER 2.6)
get_property(OpenCV_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
if(NOT ";${OpenCV_LANGUAGES};" MATCHES ";CXX;")
enable_language(CXX)
endif()
endif()
if(NOT DEFINED OpenCV_STATIC)
# look for global setting
if(BUILD_SHARED_LIBS)
set(OpenCV_STATIC OFF)
else()
set(OpenCV_STATIC ON)
endif()
endif()
if(NOT DEFINED OpenCV_CUDA)
# if user' app uses CUDA, then it probably wants CUDA-enabled OpenCV binaries
if(CUDA_FOUND)
set(OpenCV_CUDA ON)
endif()
endif()
if(MSVC)
if(CMAKE_CL_64)
set(OpenCV_ARCH x64)
set(OpenCV_TBB_ARCH intel64)
elseif((CMAKE_GENERATOR MATCHES "ARM") OR ("${arch_hint}" STREQUAL "ARM") OR (CMAKE_VS_EFFECTIVE_PLATFORMS MATCHES "ARM|arm"))
# see Modules/CmakeGenericSystem.cmake
set(OpenCV_ARCH ARM)
else()
set(OpenCV_ARCH x86)
set(OpenCV_TBB_ARCH ia32)
endif()
if(MSVC_VERSION EQUAL 1400)
set(OpenCV_RUNTIME vc8)
elseif(MSVC_VERSION EQUAL 1500)
set(OpenCV_RUNTIME vc9)
elseif(MSVC_VERSION EQUAL 1600)
set(OpenCV_RUNTIME vc10)
elseif(MSVC_VERSION EQUAL 1700)
set(OpenCV_RUNTIME vc11)
elseif(MSVC_VERSION EQUAL 1800)
set(OpenCV_RUNTIME vc12)
elseif(MSVC_VERSION EQUAL 1900)
set(OpenCV_RUNTIME vc14)
endif()
elseif(MINGW)
set(OpenCV_RUNTIME mingw)
execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpmachine
OUTPUT_VARIABLE OPENCV_GCC_TARGET_MACHINE
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(OPENCV_GCC_TARGET_MACHINE MATCHES "amd64|x86_64|AMD64")
set(MINGW64 1)
set(OpenCV_ARCH x64)
else()
set(OpenCV_ARCH x86)
endif()
endif()
if(CMAKE_VERSION VERSION_GREATER 2.6.2)
unset(OpenCV_CONFIG_PATH CACHE)
endif()
if(NOT OpenCV_FIND_QUIETLY)
message(STATUS "OpenCV ARCH: ${OpenCV_ARCH}")
message(STATUS "OpenCV RUNTIME: ${OpenCV_RUNTIME}")
message(STATUS "OpenCV STATIC: ${OpenCV_STATIC}")
endif()
get_filename_component(OpenCV_CONFIG_PATH "${CMAKE_CURRENT_LIST_FILE}" PATH CACHE)
if(OpenCV_RUNTIME AND OpenCV_ARCH)
if(OpenCV_STATIC AND EXISTS "${OpenCV_CONFIG_PATH}/${OpenCV_ARCH}/${OpenCV_RUNTIME}/staticlib/OpenCVConfig.cmake")
if(OpenCV_CUDA AND EXISTS "${OpenCV_CONFIG_PATH}/gpu/${OpenCV_ARCH}/${OpenCV_RUNTIME}/staticlib/OpenCVConfig.cmake")
set(OpenCV_LIB_PATH "${OpenCV_CONFIG_PATH}/gpu/${OpenCV_ARCH}/${OpenCV_RUNTIME}/staticlib")
else()
set(OpenCV_LIB_PATH "${OpenCV_CONFIG_PATH}/${OpenCV_ARCH}/${OpenCV_RUNTIME}/staticlib")
endif()
elseif(EXISTS "${OpenCV_CONFIG_PATH}/${OpenCV_ARCH}/${OpenCV_RUNTIME}/lib/OpenCVConfig.cmake")
if(OpenCV_CUDA AND EXISTS "${OpenCV_CONFIG_PATH}/gpu/${OpenCV_ARCH}/${OpenCV_RUNTIME}/lib/OpenCVConfig.cmake")
set(OpenCV_LIB_PATH "${OpenCV_CONFIG_PATH}/gpu/${OpenCV_ARCH}/${OpenCV_RUNTIME}/lib")
else()
set(OpenCV_LIB_PATH "${OpenCV_CONFIG_PATH}/${OpenCV_ARCH}/${OpenCV_RUNTIME}/lib")
endif()
endif()
endif()
if(OpenCV_LIB_PATH AND EXISTS "${OpenCV_LIB_PATH}/OpenCVConfig.cmake")
set(OpenCV_LIB_DIR_OPT "${OpenCV_LIB_PATH}" CACHE PATH "Path where release OpenCV libraries are located" FORCE)
set(OpenCV_LIB_DIR_DBG "${OpenCV_LIB_PATH}" CACHE PATH "Path where debug OpenCV libraries are located" FORCE)
set(OpenCV_3RDPARTY_LIB_DIR_OPT "${OpenCV_LIB_PATH}" CACHE PATH "Path where release 3rdparty OpenCV dependencies are located" FORCE)
set(OpenCV_3RDPARTY_LIB_DIR_DBG "${OpenCV_LIB_PATH}" CACHE PATH "Path where debug 3rdparty OpenCV dependencies are located" FORCE)
include("${OpenCV_LIB_PATH}/OpenCVConfig.cmake")
if(OpenCV_CUDA)
set(_OpenCV_LIBS "")
foreach(_lib ${OpenCV_LIBS})
string(REPLACE "${OpenCV_CONFIG_PATH}/gpu/${OpenCV_ARCH}/${OpenCV_RUNTIME}" "${OpenCV_CONFIG_PATH}/${OpenCV_ARCH}/${OpenCV_RUNTIME}" _lib2 "${_lib}")
if(NOT EXISTS "${_lib}" AND EXISTS "${_lib2}")
list(APPEND _OpenCV_LIBS "${_lib2}")
else()
list(APPEND _OpenCV_LIBS "${_lib}")
endif()
endforeach()
set(OpenCV_LIBS ${_OpenCV_LIBS})
endif()
set(OpenCV_FOUND TRUE CACHE BOOL "" FORCE)
set(OPENCV_FOUND TRUE CACHE BOOL "" FORCE)
if(NOT OpenCV_FIND_QUIETLY)
message(STATUS "Found OpenCV ${OpenCV_VERSION} in ${OpenCV_LIB_PATH}")
if(NOT OpenCV_LIB_PATH MATCHES "/staticlib")
get_filename_component(_OpenCV_LIB_PATH "${OpenCV_LIB_PATH}/../bin" ABSOLUTE)
file(TO_NATIVE_PATH "${_OpenCV_LIB_PATH}" _OpenCV_LIB_PATH)
message(STATUS "You might need to add ${_OpenCV_LIB_PATH} to your PATH to be able to run your applications.")
if(OpenCV_LIB_PATH MATCHES "/gpu/")
string(REPLACE "\\gpu" "" _OpenCV_LIB_PATH2 "${_OpenCV_LIB_PATH}")
message(STATUS "GPU support is enabled so you might also need ${_OpenCV_LIB_PATH2} in your PATH (it must go after the ${_OpenCV_LIB_PATH}).")
endif()
endif()
endif()
else()
if(NOT OpenCV_FIND_QUIETLY)
message(WARNING
"Found OpenCV Windows Pack but it has no binaries compatible with your configuration.
You should manually point CMake variable OpenCV_DIR to your build of OpenCV library."
)
endif()
set(OpenCV_FOUND FALSE CACHE BOOL "" FORCE)
set(OPENCV_FOUND FALSE CACHE BOOL "" FORCE)
endif()

6
compile.sh Normal file
View File

@ -0,0 +1,6 @@
#!/bin/bash
mkdir -p build
cd build
cmake ..
make -j

106
video_example.cpp Normal file
View File

@ -0,0 +1,106 @@
#include <iostream>
#include <opencv2/opencv.hpp>
#include <sys/stat.h>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
using namespace cv;
std::vector<std::string> supportedExt = {
"mp4", "MP4",
"mov", "MOV",
"mkv", "MKV"
};
inline bool in_array(const std::string &value, const std::vector<std::string> &array)
{
return std::find(array.begin(), array.end(), value) != array.end();
}
inline bool file_exists (const std::string& name)
{
struct stat buffer;
return (stat (name.c_str(), &buffer) == 0);
}
inline bool is_video (const std::string& name)
{
string ext = name.substr(name.find_last_of(".") + 1);
return in_array(ext, supportedExt);
}
int main(int argc, char** argv)
{
Mat image;
Mat inverted;
string input;
if (argc == 2)
{
input = argv[1];
}
else if (argc < 2)
{
cerr << "Please provide one video." << endl;
return -1;
}
else if (argc > 2)
{
cerr << "Please provide only one video." << endl;
return -2;
}
if (!file_exists(input))
{
cerr << "File " << input << " does not exist." << endl;
return -3;
}
if (!is_video(input))
{
cerr << "File " << input << " is not a valid video." << endl;
return -4;
}
VideoCapture cap(input);
int frameNumbers = (int)cap.get(CAP_PROP_FRAME_COUNT);
double fps = cap.get(CAP_PROP_FPS);
cout << frameNumbers << endl;
cout << fps << endl;
if (cap.isOpened() == false) {
cerr << "Cannot open the video file " << input << "." << endl;
return -5;
}
cout << "Using video " << input << "." << endl;
while(1)
{
Mat frame;
Mat inverted;
cap >> frame;
if (frame.empty())
{
break;
}
bitwise_not(frame, inverted);
imshow( "Video", inverted );
char c= (char) waitKey(25);
if (c == 27)
{
break;
}
}
cap.release();
destroyAllWindows();
return 0;
}