1 编译FFmpeg

FFmpeg版本：4.2.1

2 安装qt-5.12.10

https://blog.csdn.net/lzp_k2/article/details/82662112
下载地址：https://download.qt.io/archive/qt/
下载地址：https://download.qt.io/archive/qt/5.12/5.12.10/

如果报错

ubuntu安装qt5 Could not load the Qt platform plugin "xcb" in "" even though it was found.
https://blog.csdn.net/u012768805/article/details/98756925

需要安装：

sudo apt install --reinstall libxcb-xinerama0

Ubuntu16.04打开Qt显示/home/user/.config/QtProject/qtcreator/qtversion.xml :Permission denied

权限不够所导致，执⾏命令 sudo chown -R user:user ~/.config/ 即可解决。

默认需要使⽤sudo权限启动

不是sudo权限也能启动则需要修改权限

语法：

sudo chown -R username:username ~/.config/

⽐如我的ubuntu：
pro⽂件写法
main.c

sudo chown -R lqf:lqf ~/.config/

3 QT使⽤FFmpeg

linux_1-ffmpeg

TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += \
          main.c
INCLUDEPATH += /home/lqf/ffmpeg_build/include

LIBS += /home/lqf/ffmpeg_build/lib/libavcodec.a \
        /home/lqf/ffmpeg_build/lib/libavdevice.a \
        /home/lqf/ffmpeg_build/lib/libavfilter.a \
        /home/lqf/ffmpeg_build/lib/libavformat.a \
        /home/lqf/ffmpeg_build/lib/libavutil.a \
        /home/lqf/ffmpeg_build/lib/libswresample.a \
        /home/lqf/ffmpeg_build/lib/libswscale.a

#include <stdio.h>
// 包含ffmpeg头⽂件
#include "libavutil/avutil.h"

int main()
{
   printf("Hello FFMPEG, version is %s\n", av_version_info());
   return 0;
}

linux_2-sdl

下载地址：https://www.libsdl.org/download-2.0.php

下载SDL源码库，SDL2-2.0.10.tar.gz
解压，然后依次执⾏命令

./autogen.sh
./configure --prefix=/home/lqf/ffmpeg_build --bindir=/home/lqf/bin
make
sudo make install

linux_2-sdl-basic项⽬
linux_2-sdl-yuv

linux_3-ffmpeg-extract-aac

重点看
⼯程的pro⽂件

音视频流媒体开发【一】开发环境搭建一：Ubuntu