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Linux下安装opencv with-ffmpeg解决无法读取视频的问题

作者:互联网

1. 编译安装ffmpeg

下载源码,执行 ./configure --disable-yasm --enbale-shared --prefix=/usr/local/ffmpeg 即可。

2. 下载opencv并设置config

下载源码,并 git checkout 3.1.0,也可以是其他版本

cmake -D WITH_CUDA=OFF \
            -D CMAKE_BUILD_TYPE=Release \
            -D CMAKE_INSTALL_PREFIX=/home/packages/opencv/install \
            -D WITH_IPP=OFF \
            -D WITH_FFMPEG=ON  \
            -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \
            -D BUILD_TESTS=OFF \
            -D BUILD_PERF_TESTS=OFF \
            -D INSTALL_PYTHON_EXAMPLES=OFF \
            -D INSTALL_C_EXAMPLES=OFF \
            -D PYTHON_EXECUTABLE=$(which python) \
            -D BUILD_EXAMPLES=OFF ..

注意:

(1) 需要指定ffmpeg安装目录便于cmake找到, 否则会出现lib库找不到的问题,使得始终 FFMPEG:NO

https://blog.csdn.net/yangzhenzhen/article/details/62417021

export PKG_CONFIG_PATH=/home/packages/ffmpeg/lib/pkgconfig;$PKG_CONFIG_PATH

(2)设置ffmpeg的include路径到 bashrc文件中,并在ffmpeg/include目录下创建ffmpeg文件夹,将所有头文件拷到ffmpeg下,注意是拷贝文件不是文件夹。

(3)修改opencv中 modules/videoio/src/cap_ffmpeg_impl.hpp 代码,在最顶端添加宏定义

https://blog.csdn.net/guo_lei_lamant/article/details/81568346

#define AV_CODEC_FLAG_GLOBAL_HEADER (1 << 22)
#define CODEC_FLAG_GLOBAL_HEADER AV_CODEC_FLAG_GLOBAL_HEADER
#define AVFMT_RAWPICTURE 0x0020

否则会出现以下错误

error: ‘CODEC_FLAG_GLOBAL_HEADER’ was not declared in this scope

error: ‘AVFMT_RAWPICTURE’ was not declared in this scope

error: ‘CODEC_FLAG_GLOBAL_HEADER’ was not declared in this scope

for target 'modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o' failed
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o] Error 1

 

标签:highgui,OFF,ffmpeg,modules,opencv,BUILD,Linux
来源: https://www.cnblogs.com/haiyang21/p/11029303.html