【GStreamer】TX1在opencv中调用gstreamer解码海康IP摄像头

opencv安装方法： 
sudo apt-get update
sudo apt-get install build-essential cmake git pkg-config
sudo apt-get install libjpeg8-dev libtiff4-dev libjasper-dev libpng12-dev
sudo apt-get install libgtk2.0-dev
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
sudo apt-get install libatlas-base-dev gfortran
//在opencv里面安装gstreamer插件
sudo apt-get install gstreamer1.0-tools gstreamer1.0-alsa gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav
sudo apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-good1.0-dev libgstreamer-plugins-bad1.0-dev
//———————————–这个不要
cd ~
git clone https://github.com/Itseez/opencv.git cd opencv
git checkout 3.0.0
———————//
cd ~/opencv
nkdir build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D CUDA_GENERATION=Kepler ..
make -j4
sudo make install
编译好之后的使用方法： cvCaptureFromFile(”rtspsrc location=\”rtsp://192.168.1.64:554/user=admin&password=admin&channel=3&stream=0.sdp?real_stream–rtp-caching=10\” latency=10 ! rtph264depay ! h264parse ! omxh264dec ! videoconvert ! appsink“);
把ip改成你们的网络摄像头的IP即可。（海康大华的摄像头略有不同，根据下面修改对应的参数即可）附： 
海康： 
rtsp://[username]:[password]@[ip]:[port]/[codec]/[channel]/[subtype]/av_stream
说明： 
username: 用户名。例如admin。 
password: 密码。例如12345。 
ip: 为设备IP。例如 192.0.0.64。 
port: 端口号默认为554，若为默认可不填写。 
codec：有h264、MPEG-4、mpeg4这几种。 
channel: 通道号，起始为1。例如通道1，则为ch1。 
subtype: 码流类型，主码流为main，辅码流为sub。例如，请求海康摄像机通道1的主码流，Url如下 
主码流： 
rtsp://admin:12345@192.0.0.64:554/h264/ch1/main/av_stream 
rtsp://admin:12345@192.0.0.64:554/MPEG-4/ch1/main/av_stream子码流： 
rtsp://admin:12345@192.0.0.64/mpeg4/ch1/sub/av_stream 
rtsp://admin:12345@192.0.0.64/h264/ch1/sub/av_stream大华： 
rtsp://username:password@ip:port/cam/realmonitor?channel=1&subtype=0 
说明: 
username: 用户名。例如admin。 
password: 密码。例如admin。 
ip: 为设备IP。例如 10.7.8.122。 
port: 端口号默认为554，若为默认可不填写。 
channel: 通道号，起始为1。例如通道2，则为channel=2。 
subtype: 码流类型，主码流为0（即subtype=0），辅码流为1（即subtype=1）。例如，请求某设备的通道2的辅码流，Url如下 
rtsp://admin:admin@10.12.4.84:554/cam/realmonitor?channel=2&subtype=1解码测试： 
gst-launch-1.0 rtspsrc location=\”rtsp://admin:admin666@192.168.1.64:554/h264/ch1/main/av_stream\” latency=0 ! rtph264depay ! h264parse ! omxh264dec ! nvvidconv ! xvimagesink sync=false
海康大华摄像头格式参考：https://blog.csdn.net/xiejiashu/article/details/38523437

转自：https://blog.csdn.net/maxhn0/article/details/78423986