gstreamer1.16安装
step 1:
我们将gstreamer安装到默认的/usr/local/下，先直接将/usr/local/ 下的pkgconfig和lib路径 export 出来（这在安装完成gstreamer再安装相关插件的时候会用到）
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
export LD_LIBRARY_PATH=/usr/lib:/usr/local/lib:$LD_LIBRARY_PATH
step 2:
根据需要安装依赖
sudo apt-get install build-essential dpkg-dev flex bison autotools-dev automake liborc-dev autopoint libtool gtk-doc-tools
sudo apt-get install libxv-dev libasound2-dev libtheora-dev libogg-dev libvorbis-dev
sudo apt-get install libbz2-dev libv4l-dev libvpx-dev libjack-jackd2-dev libsoup2.4-dev libpulse-dev
sudo apt-get install faad libfaad-dev libfaac-dev
sudo apt-get install libx264-dev libmad0-dev
sudo apt-get install yasm
sudo apt-get install libssl-dev
step 3:
到 https://gstreamer.freedesktop.org/src/ 下载 gstreamer-1.16.2，gst-plugins-base-1.16.2，gst-plugins-good-1.16.2，gst-plugins-bad-1.16.2，gst-plugins-ugly-1.16.2，和 gst-libav-1.16.2，gst-rtsp-server-1.16.2（option）
解压，
cd gstreamer-1.16.2 && ./configure && make -j4 && sudo make install
cd gst-plugins-base-1.16.2 && ./configure && make -j4 && sudo make install
cd gst-plugins-good-1.16.2 && ./configure && make -j4 && sudo make install
cd gst-plugins-bad-1.16.2 && ./configure && make -j4 && sudo make install
cd gst-plugins-ugly-1.16.2 && ./configure && make -j4 && sudo make install
cd gst-libav-1.16.2 && ./configure && make -j4 && sudo make install
cd gst-rtsp-server-1.16.2 && ./configure && make -j4 && sudo make install
----------------------------------------------------------------------------------------------------
learn gstreamer: https://www.cnblogs.com/dong1/p/10423743.html
install gstreamer: https://www.cnblogs.com/walker-lin/p/11520064.html
install gcc7 , or error when compile plugin-bad
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt install gcc-7
error about glib, then,
https://www.cnblogs.com/pcat/p/5520317.html
安装完成后 gst-inspect-1.0 发现只有25个plugins，ls /usr/local/lib/gstreamer-1.0/ 下确实有很多 plugins，so export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/gstreamer-1.0/。完成后仍然只有25个plugins。使用 gst-inspect-1.0 libgstavi.so 发现无法正确解析其中的plugins。which gst-inspect-1.0 发现竟然是anaconda目录下的 gst-inspect-1.0。so,要么ln -s 使 gst-inspect-1.0 指向/usr/local/bin/gst-inspect-1.0，要么在使用 gstreamer的时候 conda deactivate。
在我的笔记本上编译 gst-plugins-bad-1.16.2的时候，提示 "gstnvdec.h:31:23: fatal error: gst/gl/gl.h: 没有那个文件或目录". /usr/local/include/gstreamer-1.0/gst/ 发现确实没有gl相关的头文件。./configure --prefix=/usr/local --enable-gl 提示 configure: No package 'gstreamer-gl-1.0' found 然后最终报告不会build gl plugin。
configure: *** checking feature: gl elements ***
configure: *** for plug-ins: gl ***
configure: *** These plugins will not be built: gl
ubuntu下 sudo apt-get install gstreamer1.0-gl是找不到这个包的。没办法只能 ./configure --prefix=/usr/local --disable-nvdec 放弃编译 nvdev。