DEV Community: SolBeen Kwon

ncnn convert 4 ubuntu

SolBeen Kwon — Wed, 29 Sep 2021 07:23:07 +0000

onnx build

pth -> onnx convert

ncnn install ncnn

cd ncnn
mkdir -p build
cd build
cmake -DCMAKE_BUILD_TYPE=Release -DNCNN_VULKAN=ON -DNCNN_SYSTEM_GLSLANG=ON -DNCNN_BUILD_EXAMPLES=ON ..
make -j$(nproc)

만약 vulkan 이 없으면 vulkan install valkan download

$ tar -xzf vulkansdk-linux-x86_64-1.1.xx.y.tar.gz
$ sudo cp $VULKAN_ROOT/x86_64/bin/* /usr/local/bin/
$ sudo cp -R $VULKAN_ROOT/x86_64/lib/* /usr/local/lib/
$ sudo ldconfig

$ sudo mkdir -p /etc/vulkan/explicit_layer.d
$ sudo cp $VULKAN_ROOT/x86_64/etc/vulkan/explicit_layer.d/* /etc/vulkan/explicit_layer.d/

$ sudo cp -R $VULKAN_ROOT/x86_64/include/* /usr/local/include/

error: (-215:Assertion failed) _step >= minstep in function 'Mat'

SolBeen Kwon — Tue, 10 Aug 2021 04:27:12 +0000

opencv mat 정의할때 채널이 맞이 않다는 에러

gst-plugin-chease

SolBeen Kwon — Thu, 17 Jun 2021 02:11:29 +0000

요구
json-glib-1.0 1.4.3 이상

json-glib-1.0 install
https://gitlab.gnome.org/GNOME/json-glib/-/tree/master

Gstreamer 명령어

SolBeen Kwon — Thu, 27 May 2021 06:21:40 +0000

윈도우에 창 띄우기

gst-launch-1.0 dxgiscreencapsrc x=0 y=0 width=1920 height=1080 cursor=TRUE ! video/x-raw,framerate=30/1 ! videoconvert ! autovideosink

gst-launch-1.0
gstreamer 명령어 프로그램
dxgiscreencapsrc x=0 y=0 width=1920 height=1080 cursor=TRUE
화면 가져오는 플러그인, cursor TRUE 이면 마우스 커서도 포함됨
0,0 위치부터 1920x1080(FHD) 크기만큼
video/x-raw,framerate=30/1
비디오 포맷 30프레임
videoconvert
비디오 프레임 변환
autovideosink
화면에 출력

mp4로 저장하기

gst-launch-1.0 dxgiscreencapsrc x=0 y=0 width=1920 height=1080 cursor=TRUE ! video/x-raw,framerate=30/1 ! videoconvert ! queue ! x264enc threads=2 tune=zerolatency pass=5 quantizer=26 speed-preset=6 ! mp4mux fragment-duration=500 ! filesink location="a.mp4"

각 항목들은 다음과 같다.

gst-launch-1.0
gstreamer 명령어 프로그램
dxgiscreencapsrc x=0 y=0 width=1920 height=1080 cursor=TRUE
화면 가져오는 플러그인, cursor TRUE 이면 마우스 커서도 포함됨
0,0 위치부터 1920x1080(FHD) 크기만큼
video/x-raw,framerate=30/1
비디오 포맷 30프레임
videoconvert
비디오 프레임 변환
queue
큐
x264enc threads=2 tune=zerolatency pass=5 quantizer=26 speed-preset=6
x.264로 인코딩
mp4mux fragment-duration=500
mp4 파일로 래핑
filesink location="a.mp4"
a.mp4로 저장한다.

화면띄우면서 영상 저장

gst-launch-1.0 dxgiscreencapsrc x=0 y=0 width=1920 height=1080 cursor=TRUE ! video/x-raw,framerate=30/1 ! tee name="local" ! videoconvert ! queue ! x264enc threads=2 tune=zerolatency pass=5 quantizer=26 speed-preset=6 ! mp4mux fragment-duration=500 ! filesink location="a.mp4" local. ! videoconvert ! autovideosink

gst-launch-1.0

gstreamer 명령어 프로그램

dxgiscreencapsrc x=0 y=0 width=1920 height=1080 cursor=TRUE

화면 가져오는 플러그인, cursor TRUE 이면 마우스 커서도 포함됨
0,0 위치부터 1920x1080(FHD) 크기만큼

video/x-raw,framerate=30/1

비디오 포맷 30프레임

tee name="local"

이 지점에서 분기 local로 분기함

videoconvert

비디오 프레임 변환

queue

다시 큐

x264enc threads=2 tune=zerolatency pass=5 quantizer=26 speed-preset=6

x.264로 인코딩

mp4mux fragment-duration=500

mp4 파일로 래핑

filesink location="a.mp4" local.

저장할 파일 이름과 여기서부터 local. 분기점 시작

videoconvert

비디오 프레임 변환

autovideosink

화면에 출력

[meson , ninja] install

SolBeen Kwon — Fri, 21 May 2021 05:17:57 +0000

ninja download

git clone https://github.com/ninja-build/ninja

ninja build & install

./configure.py --bootstrap

meson download

git clone https://github.com/mesonbuild/meson

Look at the tag name in the git log and check out at the time of release of the version. ex (git checkout 0.41.1 )

sudo python3 setup.py install

[ubuntu] How to set your country time in Docker 🐳

SolBeen Kwon — Tue, 13 Apr 2021 05:45:52 +0000

check local date

date

You can see that it is written in utc time.

Tue Apr 13 05:39:01 UTC 2021

How to set your country time.
You can set up continents and countries using the tzselect command.

tzselect

Please identify a location so that time zone rules can be set correctly.
Please select a continent, ocean, "coord", or "TZ".
1) Africa
 2) Americas
 3) Antarctica
 4) Asia
 5) Atlantic Ocean
 6) Australia
 7) Europe
 8) Indian Ocean
 9) Pacific Ocean
10) coord - I want to use geographical coordinates.

 1) ?land Islands         18) Greece                35) Norway
 2) Albania               19) Guernsey              36) Poland
 3) Andorra               20) Hungary               37) Portugal
 4) Austria               21) Ireland               38) Romania
 5) Belarus               22) Isle of Man           39) Russia
 6) Belgium               23) Italy                 40) San Marino
 7) Bosnia & Herzegovina  24) Jersey                41) Serbia
 8) Britain (UK)          25) Latvia                42) Slovakia
 9) Bulgaria              26) Liechtenstein         43) Slovenia
10) Croatia               27) Lithuania             44) Spain
11) Czech Republic        28) Luxembourg            45) Svalbard & Jan Mayen
12) Denmark               29) Malta                 46) Sweden
13) Estonia               30) Moldova               47) Switzerland
14) Finland               31) Monaco                48) Turkey
15) France                32) Montenegro            49) Ukraine
16) Germany               33) Netherlands           50) Vatican 
City
17) Gibraltar             34) North Macedonia

===================================
If you want to change Docker's time

Use tzdate (in docker)

 sudo apt-get install tzdata
 dpkg-reconfigure tzdata

Link the desired time zone to /etc/local time.(out docker)

sudo ln -sf /usr/share/zoneinfo/Asia/Seoul /etc/localtime

Then run the docker.

 sudo docker run ...
  -v /etc/localtime:/etc/localtime:ro \
  -e TZ=Asia/Seoul

[FTP] Permission Denied

SolBeen Kwon — Thu, 08 Apr 2021 05:07:30 +0000

Permission Denied Error Resolution that occurs while transferring files to the server using FTP

This error occurs because the path to that server is not authorized.
To give permission, you can enter the command on the Linux server as follows.

sudo chmod -R 777 /path/

VSCODE shortcut

SolBeen Kwon — Tue, 06 Apr 2021 05:31:42 +0000

General
Ctrl+Shift+P, F1 Show Command Palette
Ctrl+P Quick Open, Go to File…
Ctrl+Shift+N New window/instance
Ctrl+Shift+W Close window/instance
Ctrl+, User Settings
Ctrl+K Ctrl+S Keyboard Shortcuts
Basic editing
Ctrl+X Cut line (empty selection)
Ctrl+C Copy line (empty selection)
Alt+ ↑ / ↓ Move line up/down
Shift+Alt + ↓ / ↑ Copy line up/down
Ctrl+Shift+K Delete line
Ctrl+Enter Insert line below
Ctrl+Shift+Enter Insert line above
Ctrl+Shift+\ Jump to matching bracket
Ctrl+] / [ Indent/outdent line
Home / End Go to beginning/end of line
Ctrl+Home Go to beginning of file
Ctrl+End Go to end of file
Ctrl+↑ / ↓ Scroll line up/down
Alt+PgUp / PgDn Scroll page up/down
Ctrl+Shift+[ Fold (collapse) region
Ctrl+Shift+] Unfold (uncollapse) region
Ctrl+K Ctrl+[ Fold (collapse) all subregions
Ctrl+K Ctrl+] Unfold (uncollapse) all subregions
Ctrl+K Ctrl+0 Fold (collapse) all regions
Ctrl+K Ctrl+J Unfold (uncollapse) all regions
Ctrl+K Ctrl+C Add line comment
Ctrl+K Ctrl+U Remove line comment
Ctrl+/ Toggle line comment
Shift+Alt+A Toggle block comment
Alt+Z Toggle word wrap
Navigation
Ctrl+T Show all Symbols
Ctrl+G Go to Line...
Ctrl+P Go to File...
Ctrl+Shift+O Go to Symbol...
Ctrl+Shift+M Show Problems panel
F8 Go to next error or warning
Shift+F8 Go to previous error or warning
Ctrl+Shift+Tab Navigate editor group history
Alt+ ← / → Go back / forward
Ctrl+M Toggle Tab moves focus
Search and replace
Ctrl+F Find
Ctrl+H Replace
F3 / Shift+F3 Find next/previous
Alt+Enter Select all occurences of Find match
Ctrl+D Add selection to next Find match
Ctrl+K Ctrl+D Move last selection to next Find match
Alt+C / R / W Toggle case-sensitive / regex / whole word
Multi-cursor and selection
Alt+Click Insert cursor
Ctrl+Alt+ ↑ / ↓ Insert cursor above / below
Ctrl+U Undo last cursor operation
Shift+Alt+I Insert cursor at end of each line selected
Ctrl+L Select current line
Ctrl+Shift+L Select all occurrences of current selection
Ctrl+F2 Select all occurrences of current word
Shift+Alt+→ Expand selection
Shift+Alt+← Shrink selection
Shift+Alt +
(drag mouse)
Column (box) selection
Ctrl+Shift+Alt
+(arrow key)
Column (box) selection
Ctrl+Shift+Alt
+PgUp/PgDn
Column (box) selection page up/down
Rich languages editing
Ctrl+Space Trigger suggestion
Ctrl+Shift+Space Trigger parameter hints
Shift+Alt+F Format document
Ctrl+K Ctrl+F Format selection
F12 Go to Definition
Alt+F12 Peek Definition
Ctrl+K F12 Open Definition to the side
Ctrl+. Quick Fix
Shift+F12 Show References
F2 Rename Symbol
Ctrl+K Ctrl+X Trim trailing whitespace
Ctrl+K M Change file language
Editor management
Ctrl+F4, Ctrl+W Close editor
Ctrl+K F Close folder
Ctrl+\ Split editor
Ctrl+ 1 / 2 / 3 Focus into 1
st, 2nd or 3rd editor group
Ctrl+K Ctrl+ ←/→ Focus into previous/next editor group
Ctrl+Shift+PgUp / PgDn Move editor left/right
Ctrl+K ← / → Move active editor group
File management
Ctrl+N New File
Ctrl+O Open File...
Ctrl+S Save
Ctrl+Shift+S Save As...
Ctrl+K S Save All
Ctrl+F4 Close
Ctrl+K Ctrl+W Close All
Ctrl+Shift+T Reopen closed editor
Ctrl+K Enter Keep preview mode editor open
Ctrl+Tab Open next
Ctrl+Shift+Tab Open previous
Ctrl+K P Copy path of active file
Ctrl+K R Reveal active file in Explorer
Ctrl+K O Show active file in new window/instance
Display
F11 Toggle full screen
Shift+Alt+0 Toggle editor layout (horizontal/vertical)
Ctrl+ = / - Zoom in/out
Ctrl+B Toggle Sidebar visibility
Ctrl+Shift+E Show Explorer / Toggle focus
Ctrl+Shift+F Show Search
Ctrl+Shift+G Show Source Control
Ctrl+Shift+D Show Debug
Ctrl+Shift+X Show Extensions
Ctrl+Shift+H Replace in files
Ctrl+Shift+J Toggle Search details
Ctrl+Shift+U Show Output panel
Ctrl+Shift+V Open Markdown preview
Ctrl+K V Open Markdown preview to the side
Ctrl+K Z Zen Mode (Esc Esc to exit)
Debug
F9 Toggle breakpoint
F5 Start/Continue
Shift+F5 Stop
F11 / Shift+F11 Step into/out
F10 Step over
Ctrl+K Ctrl+I Show hover
Integrated terminal
Ctrl+Show integrated terminal Ctrl+Shift+ Create new terminal
Ctrl+C Copy selection
Ctrl+V Paste into active terminal
Ctrl+↑ / ↓ Scroll up/down
Shift+PgUp / PgDn Scroll page up/down
Ctrl+Home / End Scroll to top/bottom
Keyboard shortcuts for Windows
Other operating systems’ keyboard shortcuts and

[C++] #include opencv2.xxx.h no such file or directory

SolBeen Kwon — Fri, 02 Apr 2021 05:44:24 +0000

because /usr/include does not have opencv2 folder or opencv2/xxx.h header file
If you installed opencv4, you might have installed the opencv installation path on /usr/local/ during installation.
/usr/local/include/opencv4/opencv2 folder can be found to have the xxx.h header file!

따라서

#include <opencv4/opencv2/xxxx.h>

====================================================
c++ include 기본 경로를 보는 명령어는
echo | gcc -v -x c -E -
echo | gcc -v -x c++ -E -

=================================================
make했을때 경로에러가 난다면 Makefile 에

컴파일시 include 경로를 추가해주면 된다.

Docker container Commit & Push

SolBeen Kwon — Fri, 02 Apr 2021 04:51:40 +0000

commit a running container.

Commit container to images_name

docker commit CONTAINER IMAGE_NAME

push Docker image

docker push images_name

How to install CMAKE (lastest version)

SolBeen Kwon — Thu, 01 Apr 2021 09:17:24 +0000

Let's install openssl before installing cmake.

1. openSSL install
homepage download
openssl download

sudo apt install wget
wget https://www.openssl.org/source/openssl-1.1.1d.tar.gz
tar openssl-1.1d.tar.gz
cd openssl-1.1.1d

build OpenSSL

./config
make
make test
sudo make install

2.Cmake at lastest version install

2.1 홈페이지에서 다운로드

cmake download

2.2 wget 으로 다운로드

wget https://cmake.org/files/v3.16/cmake-3.16.2.tar.gz

2.3 압축풀기 및 설치

$ tar -xvzf 해당파일.tar.gz
$ cd 압축풀린폴더
$ ./bootstrap --prefix=/usr/local
$ make
$ make install

2.4 설치 확인

$ cmake --version

만약에 해당 명령어를 찾을 수 없다고 나오는 경우에는

$ vi ~./bash_profile

아래와 같이 패스 수정

PATH=/usr/local/bin:$PATH:$HOME/bin

그 다음 ssh 를 재시작 하면 된다.

how to install OpenCV 4.2.0 on Ubuntu 18.04

SolBeen Kwon — Thu, 01 Apr 2021 08:23:01 +0000

Install required packages before compilation of OpenCV

build-essential

The package includes a C/C++ compiler, related libraries, and tools such as make.

cmake

Required for compilation options, settings for OpenCV modules to be included in the built library, etc.

sudo apt-get install build-essential cmake

Packages required to import or record image files in a particular format

sudo apt-get install libjpeg-dev libtiff5-dev libpng-dev

Packages that are required to read or record video files from a particular codec.

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libxvidcore-dev libx264-dev libxine2-dev

The Video4Linux package includes device drivers and APIs to support real-time video capture on Linux.

sudo apt-get install libv4l-dev v4l-utils

GStreamer is a library for streaming video

sudo apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev

OpenCV can window itself using the highgui module to show images or videos.

sudo apt-get install libgtk2.0-dev

Library required to support OpenGL.

sudo apt-get install mesa-utils libgl1-mesa-dri libgtkgl2.0-dev libgtkglext1-dev

Libraries used for OpenCV optimization.

sudo apt-get install libatlas-base-dev gfortran libeigen3-dev

The python2.7-dev and python3-dev packages are required for OpenCV-Python binding.

Numpy is used in OpenCV because it can process matrix operations quickly.

sudo apt-get install python2.7-dev python3-dev python-numpy python3-numpy

OpenCV Install (이제시작)

Download and extract the OpenCV 4.2.0 source code from the homepage.

$ wget -O opencv.zip https://github.com/opencv/opencv/archive/4.2.0.zip

$ unzip opencv_contrib.zip

Download and extract the opencv_contrib (extramodules) source code

$ wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.2.0.zip
$ unzip opencv_contrib.zip

cd opencv-4.0.1/
mkdir build
cd build

Set the opencv compilation using cmake.
/usr/local 에 opencv4/opencv2 install

cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D WITH_TBB=OFF \
-D WITH_IPP=OFF \
-D WITH_1394=OFF \
-D BUILD_WITH_DEBUG_INFO=OFF \
-D BUILD_DOCS=OFF \
-D INSTALL_C_EXAMPLES=ON \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D BUILD_EXAMPLES=OFF \
-D BUILD_TESTS=OFF \
-D BUILD_PERF_TESTS=OFF \
-D WITH_QT=OFF \
-D WITH_GTK=ON \
-D WITH_OPENGL=ON \
-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.2.0/modules \
-D WITH_V4L=ON  \
-D WITH_FFMPEG=ON \
-D WITH_XINE=ON \
-D BUILD_NEW_PYTHON_SUPPORT=ON \
-D OPENCV_GENERATE_PKGCONFIG=ON ../

If you see the following message, it is normal.

-- Configuring done

-- Generating done

-- Build files have been written to: -- Configuring done

-- Generating done

-- Build files have been written to: /home/xxxxx/opencv/opencv-4.2.0/build

Start the compilation using the make(It can take a long time.)

make

If the compilation is successful, you can view the following messages:

[100%] Building CXX object modules/python3/CMakeFiles/opencv_python3.dir/__/src2/cv2.cpp.o
[100%] Building CXX object modules/python2/CMakeFiles/opencv_python2.dir/__/src2/cv2.cpp.o
[100%] Linking CXX shared module ../../lib/python3/cv2.cpython-36m-x86_64-linux-gnu.so
[100%] Linking CXX shared module ../../lib/cv2.so
[100%] Built target opencv_python3
[100%] Built target opencv_python2

You will now install the compilation output.

sudo make install

Check Opencv Installation Results

Check Cpp

g++ -o Hellow Hellow.cpp $(pkg-config opencv4 --libs --cflags)

Check python3

python3
Python 3.6.9 (default, Nov  7 2019, 10:44:02) 

[GCC 8.3.0] on linux

Type "help", "copyright", "credits" or "license" for more information.

>>> import cv2

>>> cv2.__version__

'4.2.0'

>>>