Open Source Computer Vision Library https://opencv.org/
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# --- FFMPEG ---
if(NOT HAVE_FFMPEG AND OPENCV_FFMPEG_USE_FIND_PACKAGE)
if(OPENCV_FFMPEG_USE_FIND_PACKAGE STREQUAL "1" OR OPENCV_FFMPEG_USE_FIND_PACKAGE STREQUAL "ON")
set(OPENCV_FFMPEG_USE_FIND_PACKAGE "FFMPEG")
endif()
find_package(${OPENCV_FFMPEG_USE_FIND_PACKAGE}) # Required components: AVCODEC AVFORMAT AVUTIL SWSCALE
if(FFMPEG_FOUND OR FFmpeg_FOUND)
set(HAVE_FFMPEG TRUE)
endif()
endif()
if(NOT HAVE_FFMPEG AND WIN32 AND NOT ARM AND NOT OPENCV_FFMPEG_SKIP_DOWNLOAD)
include("${OpenCV_SOURCE_DIR}/3rdparty/ffmpeg/ffmpeg.cmake")
download_win_ffmpeg(FFMPEG_CMAKE_SCRIPT)
if(FFMPEG_CMAKE_SCRIPT)
include("${FFMPEG_CMAKE_SCRIPT}")
set(FFMPEG_libavcodec_VERSION ${FFMPEG_libavcodec_VERSION} PARENT_SCOPE) # info
set(FFMPEG_libavformat_VERSION ${FFMPEG_libavformat_VERSION} PARENT_SCOPE) # info
set(FFMPEG_libavutil_VERSION ${FFMPEG_libavutil_VERSION} PARENT_SCOPE) # info
set(FFMPEG_libswscale_VERSION ${FFMPEG_libswscale_VERSION} PARENT_SCOPE) # info
set(FFMPEG_libavresample_VERSION ${FFMPEG_libavresample_VERSION} PARENT_SCOPE) # info
set(HAVE_FFMPEG TRUE)
set(HAVE_FFMPEG_WRAPPER TRUE)
endif()
endif()
if(NOT HAVE_FFMPEG AND PKG_CONFIG_FOUND)
pkg_check_modules(FFMPEG libavcodec libavformat libavutil libswscale QUIET)
pkg_check_modules(FFMPEG_libavresample libavresample QUIET) # optional
if(FFMPEG_FOUND)
if(FFMPEG_libavresample_FOUND)
list(APPEND FFMPEG_LIBRARIES ${FFMPEG_libavresample_LIBRARIES})
endif()
# rewrite libraries to absolute paths
foreach(lib ${FFMPEG_LIBRARIES})
find_library(FFMPEG_ABSOLUTE_${lib} "${lib}" PATHS "${FFMPEG_lib${lib}_LIBDIR}" "${FFMPEG_LIBRARY_DIRS}" NO_DEFAULT_PATH)
if(FFMPEG_ABSOLUTE_${lib})
list(APPEND ffmpeg_abs_libs "${FFMPEG_ABSOLUTE_${lib}}")
else()
list(APPEND ffmpeg_abs_libs "${lib}")
endif()
endforeach()
set(FFMPEG_LIBRARIES "${ffmpeg_abs_libs}" CACHE INTERNAL "" FORCE)
set(HAVE_FFMPEG TRUE)
endif()
endif()
#==================================
if(HAVE_FFMPEG AND NOT HAVE_FFMPEG_WRAPPER AND NOT OPENCV_FFMPEG_SKIP_BUILD_CHECK)
try_compile(__VALID_FFMPEG
"${OpenCV_BINARY_DIR}"
"${OpenCV_SOURCE_DIR}/cmake/checks/ffmpeg_test.cpp"
CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${FFMPEG_INCLUDE_DIRS}"
"-DLINK_LIBRARIES:STRING=${FFMPEG_LIBRARIES}"
OUTPUT_VARIABLE TRY_OUT
)
if(NOT __VALID_FFMPEG)
# message(FATAL_ERROR "FFMPEG: test check build log:\n${TRY_OUT}")
message(STATUS "WARNING: Can't build ffmpeg test code")
set(HAVE_FFMPEG FALSE)
endif()
endif()
#==================================
if(HAVE_FFMPEG)
set(defs "HAVE_FFMPEG")
if(HAVE_FFMPEG_WRAPPER)
list(APPEND defs "HAVE_FFMPEG_WRAPPER")
endif()
ocv_add_external_target(ffmpeg "${FFMPEG_INCLUDE_DIRS}" "${FFMPEG_LIBRARIES}" "${defs}")
endif()
set(HAVE_FFMPEG ${HAVE_FFMPEG} PARENT_SCOPE)