Une erreur a été signalée et il a été constaté que la bibliothèque libz était manquante. Installez et parcourez la bibliothèque libz.
CMakeListes：
cmake_minimum_required(VERSION 3.10)
project(ffmpegTest)
set(CMAKE_CXX_STANDARD 11)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pthread")
set (EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
aux_source_directory (src SRC_LIST)
include_directories(${PROJECT_SOURCE_DIR}/include)
add_executable(main ${SRC_LIST})
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libavformat.a)
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libavdevice.a)
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libavcodec.a)
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libavutil.a)
target_link_libraries(main pthread)
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libswscale.a)
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libz.a)
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libswresample.a)
target_link_libraries(main ${PROJECT_SOURCE_DIR}/lib/libavutil.a)