add opencl hw decoding in gst and intel acceeleration's opencv that reduce double the CPU usage rate in a sot task.

scripts/x86-intel/gst-install.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+sudo apt install -y libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
+sudo apt install -y libgstreamer-plugins-bad1.0-dev gstreamer1.0-plugins-base
+sudo apt install -y gstreamer1.0-plugins-good gstreamer1.0-plugins-bad 
+sudo apt install -y gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc
+sudo apt install -y gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa
+sudo apt install -y gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 
+sudo apt install -y gstreamer1.0-pulseaudio
+sudo apt install -y gtk-doc-tools
+sudo apt install -y libeigen3-dev libfmt-dev v4l-utils
+
+git clone https://gitee.com/jario-jin/gst-rtsp-server-b18.git
+cd gst-rtsp-server-b18
+./autogen.sh
+make
+sudo make install
+cd ..
+sudo rm -r gst-rtsp-server-b18
+

scripts/x86-intel/libva-install-gst.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+sudo apt-get install -y libmfx1 libmfx-tools libva-dev libmfx-dev intel-media-va-driver-non-free vainfo va-driver-all vdpau-va-driver
+echo "export LIBVA_DRIVER_NAME=i965" >> ~/.bashrc
+export LIBVA_DRIVER_NAME=i965
+

scripts/x86-intel/opencv470-intel-install.sh

@@ -60,7 +60,19 @@ cmake -D CMAKE_BUILD_TYPE=Release \
       -D WITH_CUDA=OFF \
       -D OPENCV_ENABLE_NONFREE=ON \
       -D CMAKE_INSTALL_PREFIX=/usr/local \
-      -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.7.0/modules ..
+      -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.7.0/modules \
+      -D BUILD_PNG=ON \
+      -D BUILD_JASPER=ON \
+      -D BUILD_JPEG=ON \
+      -D BUILD_TIFF=ON \
+      -D BUILD_ZLIB=ON \
+      -D WITH_JPEG=ON \
+      -D WITH_PNG=ON \
+      -D WITH_JASPER=ON \
+      -D WITH_TIFF=ON \
+      -D WITH_TBB=ON \
+      -D WITH_ZLIB=ON \
+      -D WITH_OPENCL=ON ..
 
 make -j2
 sudo make install

video_io/sv_video_input.cpp

@@ -159,13 +159,23 @@ void Camera::openImpl()
       this->_fps = 30;
     }
 
-#if defined(PLATFORM_X86_CUDA) || defined(PLATFORM_X86_INTEL)
+#if defined(PLATFORM_X86_CUDA)
     sprintf(pipe, "rtspsrc location=%s?W=%d&H=%d&FPS=%d latency=100 ! \
                    application/x-rtp,media=video ! rtph264depay ! parsebin ! avdec_h264 ! \
                    videoconvert ! appsink sync=false", 
                    this->_rtsp_url.c_str(), this->_width, this->_height, this->_fps);
     this->_cap.open(pipe, cv::CAP_GSTREAMER);
 #endif
+#if defined(PLATFORM_X86_INTEL)
+    sprintf(pipe, "rtspsrc location=%s?W=%d&H=%d&FPS=%d latency=100 ! \
+                   application/x-rtp,media=video ! rtph264depay ! parsebin ! vaapih264dec ! \
+                   vaapipostproc ! video/x-raw,format=YV12,framerate=25/1 ! videoconvert ! videorate ! video/x-raw,framerate=25/1 ! \
+                   appsink sync=false",
+                   this->_rtsp_url.c_str(), this->_width, this->_height, this->_fps);
+    this->_cap.open(pipe, cv::CAP_GSTREAMER);
+#endif
+
+
 #ifdef PLATFORM_JETSON
     sprintf(pipe, "rtspsrc location=%s?W=%d&H=%d&FPS=%d latency=100 ! application/x-rtp,media=video ! rtph264depay ! parsebin ! nvv4l2decoder enable-max-performancegst=1 ! nvvidconv ! video/x-raw,format=(string)BGRx ! videoconvert ! appsink sync=false", this->_rtsp_url.c_str(), this->_width, this->_height, this->_fps);
     this->_cap.open(pipe, cv::CAP_GSTREAMER);