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学习课题：逐步构建开发播放器【QT5 + FFmpeg6 + SDL2】

环境配置

我这边的是使用macOS；IDE用的是CLion；CMake构建，除了创建项目步骤、CMakeLists文件有区别之外的代码层面不会有太大区别。

配置上只添加一下CMakeLists中FFmpeg和SDL的配置就可以了

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另外：我这边的系统是macOS系统，暂时提供的文件也是mac平台的，win平台可能不能直接用。

FFmpeg配置

include_directories(./ffmpeg6.0/include)
link_directories(./ffmpeg6.0/lib)set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -v -stdlib=libc++ -framework OpenGL -framework AppKit -framework Security -framework CoreFoundation -framework CoreVideo -framework CoreMedia -framework QuartzCore -framework CoreFoundation -framework VideoDecodeAcceleration -framework Cocoa -framework AudioToolbox -framework VideoToolbox -framework OpenCL ")# for macos
# target_link_libraries 内添加libavformat.a libavcodec.a libavutil.a libswscale.a swresample liblzma.tbd libz.1.2.5.dylib libbz2.dylib libiconv.dylib

SDL配置

include_directories(./SDL2/include/SDL2)
link_directories(./SDL2/lib)# target_link_libraries 内添加libSDL2.a

最终CmakeLists(根据自己系统环境进行修改）

cmake_minimum_required(VERSION 3.26)
project(SimplePlayer)set(CMAKE_CXX_STANDARD 11)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)include_directories("./")
set(CMAKE_PREFIX_PATH "/usr/local/Cellar/qt@5/5.15.10_1")# ffmpeg path
include_directories(./ffmpeg6.0/include)
link_directories(./ffmpeg6.0/lib)
# sdl path
include_directories(./SDL2/include/SDL2)
link_directories(./SDL2/lib)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -v -stdlib=libc++ -framework OpenGL -framework AppKit -framework Security -framework CoreFoundation -framework CoreVideo -framework CoreMedia -framework QuartzCore -framework CoreFoundation -framework VideoDecodeAcceleration -framework Cocoa -framework AudioToolbox -framework VideoToolbox -framework OpenCL ")find_package(Qt5 COMPONENTSCoreGuiWidgetsREQUIRED)add_executable(SimplePlayer main.cpp)
target_link_libraries(SimplePlayerQt5::CoreQt5::GuiQt5::Widgetslibavformat.a libavcodec.a libavutil.a libswscale.aswresampleliblzma.tbdlibz.1.2.5.dyliblibbz2.dyliblibiconv.dylib# sdl2libSDL2.a
)

导入方式

# FFmpegextern "C" {
#include "libavcodec/avcodec.h"
#include "libavfilter/avfilter.h"
#include "libavformat/avformat.h"
#include "libavutil/avassert.h"
#include "libavutil/ffversion.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/time.h"
#include "libswresample/swresample.h"
#include "libswscale/swscale.h"
#include "libavutil/audio_fifo.h"}# SDL2#include "SDL.h"

可以单独放在一个xxxx.h文件中，统一导入这个.h文件，就不用每个模块都导入一部分，左一个右一个的。