FFmpeg入门 - Android移植

系列文章:

1. FFmpeg入门 - 视频播放

2. FFmpeg入门 - rtmp推流

3. FFmpeg入门 - Android移植

4. FFmpeg入门 - 格式转换

前两篇文章介绍了如何使用ffmpeg推流和拉流,这篇我们来看看怎样将之前的代码移植到安卓上。

1、FFmpeg编译与集成

FFmpeg的安卓交叉编译网上有很多的资料,基本上都是些编译配置而已。可以直接将我的脚本放到ffmpeg源码根目录,修改下NDK的路径和想要编译的ABI之后直接执行。然后就能在android目录里面得到编译好的so和.h

如果的确编译出现问题,也可以直接用我编出来的库。

将库放到AndroidStudio工程的jniLibs目录,将include目录放到app/src/main/cpp下,然后修改CMakeLists.txt添加ffmpeg头文件路径、库路径、链接配置等:

cmake_minimum_required(VERSION 3.18.1)
​
project("ffmpegdemo")
​
add_library(ffmpegdemo SHARED ffmpeg_demo.cpp video_sender.cpp opengl_display.cpp egl_helper.cpp video_decoder.cpp)
​
find_library(log-lib log)
​
# 头文件路径
include_directories(${CMAKE_SOURCE_DIR}/include)
​
# ffmpeg库依赖
add_library(avcodec SHARED IMPORTED)
set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../../jniLibs/${ANDROID_ABI}/libavcodec.so)
​
add_library(avfilter SHARED IMPORTED)
set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../../jniLibs/${ANDROID_ABI}/libavfilter.so)
​
add_library(avformat SHARED IMPORTED)
set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../../jniLibs/${ANDROID_ABI}/libavformat.so)
​
add_library(avutil SHARED IMPORTED)
set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../../jniLibs/${ANDROID_ABI}/libavutil.so)
​
add_library(swresample SHARED IMPORTED)
set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../../jniLibs/${ANDROID_ABI}/libswresample.so)
​
add_library(swscale SHARED IMPORTED)
set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../../../jniLibs/${ANDROID_ABI}/libswscale.so)
​
target_link_libraries(
        ffmpegdemo
​
        # log
        ${log-lib}
​
        EGL
        GLESv2
        android
​