Robin van Emden robinvanemden

## gstreamer-tips.md

      
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                robinvanemden
                / gstreamer-tips.md
            
            
              Created
              September 1, 2022 11:58
                — forked from flufy3d/gstreamer-tips.md
            
              
                gstreamer remote streaming
              
          
    simple test

gst-launch-1.0 -v videotestsrc ! video/x-raw,width=1280,height=640 ! glimagesink
streaming mpegts

gst-launch-1.0 -v videotestsrc ! video/x-raw,width=1280,height=640 ! videoconvert ! x264enc key-int-max=12 byte-stream=true ! mpegtsmux ! tcpserversink port=8888 host=0.0.0.0
vlc using tcp://192.168.1.192:8888

  
## gist:5927db05cb7ad38d98a22674fa82a4c6
On an Orin NX 16G the memory was too low to compile and the SWAP file had to be increased.

/etc/systemd/nvzramconfig.sh
change:

```
# Calculate memory to use for zram (1/2 of ram)
totalmem=`LC_ALL=C free | grep -e "^Mem:" | sed -e 's/^Mem: *//' -e 's/  *.*//'`
mem=$((("${totalmem}" / 2 / "${NRDEVICES}") * 1024))
```

## aarch64-cuda-10.2-ubuntu18.dockerfile
# Install aarch64 cross depedencies based on Jetpack 4.4
# Dependencies require cuda-toolkit-10.2 which isn't installed in nvidia docker container
# It contains cuda-compat instead. However deb files currently depend on cuda-toolkit alone.
# Hence force dpkg configure
RUN wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cross-aarch64-10-2_10.2.89-1_all.deb && \
    wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cross-aarch64_10.2.89-1_all.deb && \
    wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cudart-cross-aarch64-10-2_10.2.89-1_all.deb && \
    wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cufft-cross-aarch64-10-2_10.2.89-1_all.deb && \
    wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cupti-cross-aarch64-10-2_10.2.89-1_all.deb && \
    wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-curand-cross-aarch64-10-2_10.2.89-1_all.deb && \

## gige_gst_v4l.md

      
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              24 stars
            
          
                nitheeshkl
                / gige_gst_v4l.md
            
            
              Last active
              April 12, 2024 02:44
            
              
                Gstreamer pipelines to use GigE cams as webcam for Zoom/Teams/Skype
              
          
    Using GigE cam as webcam for Zoom/Skype/Teams

TL;DR: Creates a Gstreamer pipeline to read camera frames from a GigE camera, using Aravis library, and publish them as V4l2 camera source, using V4l2loopback, that can be read by video conferencing programs like Zoom/Skype/Teams.
gst-launch-1.0 aravissrc blocksize=5013504 h-binning=1 v-binning=1 ! video/x-bayer,format=rggb,framerate=100/5,width=2448,height=2048 ! bayer2rgb ! video/x-raw,format=RGBx ! videoconvert ! video/x-raw,format=YUY2 !  aspectratiocrop aspect-ratio=16/9 ! videoscale ! video/x-raw,width=1280,height=720 ! queue ! v4l2sink device=/dev/video0


The Basics


## installing_nvidia_driver_cuda_cudnn_linux.md

      
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                kmhofmann
                / installing_nvidia_driver_cuda_cudnn_linux.md
            
            
              Last active
              March 8, 2024 19:42
            
              
                Installing the NVIDIA driver, CUDA and cuDNN on Linux
              
          
    Installing the NVIDIA driver, CUDA and cuDNN on Linux (Ubuntu 20.04)

This is a companion piece to my instructions on building TensorFlow from source.
In particular, the aim is to install the following pieces of software

NVIDIA graphics card driver (v450.57)
CUDA (v11.0.2)
cuDNN (v8.0.2.39)

on an Ubuntu Linux system, in particular Ubuntu 20.04.

  
## install-linux-perf-on-wsl2.sh
apt install flex bison
git clone https://github.com/microsoft/WSL2-Linux-Kernel --depth 1
cd WSL2-Linux-Kernel/tools/perf
make -j8
sudo cp perf /usr/local/bin

## wasm-summit-2020-notes.md

      
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              14 stars
            
          
                bushidocodes
                / wasm-summit-2020-notes.md
            
            
              Last active
              July 30, 2020 23:47
            
              
                WebAssembly Summit 2020 Notes
              
          
    WebAssembly Summit 2020

https://webassembly-summit.org/
Lin Clark's Talk - "WebAssembly Nanoprocess"

https://www.youtube.com/watch?v=IBZFJzGnBoU

the missing functionality alongside WASI and Interface Types is something that provides "capability-based security".
Delegation of permissions to propagate down transitive dependencies
plan to use fine-grain form of per-module virtualization
A "WebAssembly nanoprocess" is just wasm, but follows a particular pattern.


## postgres_ubuntu.sh
#!/bin/bash
sudo apt update
sudo apt upgrade -y
sudo apt install postgresql postgresql-contrib -y
#To allow database to be accessed remotely follow this https://linuxize.com/post/how-to-install-postgresql-on-ubuntu-18-04/
#you need to edit the follwoing 2 files using vim - the most difficult part, vim instructions here https://vim.rtorr.com/
#sudo vim /etc/postgresql/10/main/postgresql.conf
sudo sed -i s/"#listen_addresses = 'localhost'"/"listen_addresses = '*' "/g /etc/postgresql/12/main/postgresql.conf
#sudo vim /etc/postgresql/10/main/pg_hba.conf
sudo sed -i '96s@127.0.0.1/32@0.0.0.0/0@' /etc/postgresql/12/main/pg_hba.conf

## postman-echo.c
/**
 * Simple program to POST a HTTP request
 *
 * see:
 *  https://docs.postman-echo.com/?version=latest
 *  https://aticleworld.com/http-get-and-post-methods-example-in-c/
 *  https://stackoverflow.com/questions/11208299/how-to-make-an-http-get-request-in-c-without-libcurl
 *  https://stackoverflow.com/questions/22077802/simple-c-example-of-doing-an-http-post-and-consuming-the-response
 */

## test.cpp
#include <iostream>
#include "include/libnpy/npy.hpp"
#include "arm_compute/runtime/NEON/NEFunctions.h"

#include "arm_compute/core/Types.h"
#include "arm_compute/runtime/Allocator.h"
#include "arm_compute/runtime/BlobLifetimeManager.h"
#include "arm_compute/runtime/MemoryManagerOnDemand.h"
#include "arm_compute/runtime/PoolManager.h"
#include "utils/Utils.h"
	On an Orin NX 16G the memory was too low to compile and the SWAP file had to be increased.

	/etc/systemd/nvzramconfig.sh
	change:

	```
	# Calculate memory to use for zram (1/2 of ram)
	totalmem=`LC_ALL=C free \| grep -e "^Mem:" \| sed -e 's/^Mem: //' -e 's/ .*//'`
	mem=$((("${totalmem}" / 2 / "${NRDEVICES}") * 1024))
	```
	# Install aarch64 cross depedencies based on Jetpack 4.4
	# Dependencies require cuda-toolkit-10.2 which isn't installed in nvidia docker container
	# It contains cuda-compat instead. However deb files currently depend on cuda-toolkit alone.
	# Hence force dpkg configure
	RUN wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cross-aarch64-10-2_10.2.89-1_all.deb && \
	wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cross-aarch64_10.2.89-1_all.deb && \
	wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cudart-cross-aarch64-10-2_10.2.89-1_all.deb && \
	wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cufft-cross-aarch64-10-2_10.2.89-1_all.deb && \
	wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-cupti-cross-aarch64-10-2_10.2.89-1_all.deb && \
	wget https://repo.download.nvidia.com/jetson/x86_64/pool/r32.4/c/cuda/cuda-curand-cross-aarch64-10-2_10.2.89-1_all.deb && \
	apt install flex bison
	git clone https://github.com/microsoft/WSL2-Linux-Kernel --depth 1
	cd WSL2-Linux-Kernel/tools/perf
	make -j8
	sudo cp perf /usr/local/bin
	#!/bin/bash
	sudo apt update
	sudo apt upgrade -y
	sudo apt install postgresql postgresql-contrib -y
	#To allow database to be accessed remotely follow this https://linuxize.com/post/how-to-install-postgresql-on-ubuntu-18-04/
	#you need to edit the follwoing 2 files using vim - the most difficult part, vim instructions here https://vim.rtorr.com/
	#sudo vim /etc/postgresql/10/main/postgresql.conf
	sudo sed -i s/"#listen_addresses = 'localhost'"/"listen_addresses = '*' "/g /etc/postgresql/12/main/postgresql.conf
	#sudo vim /etc/postgresql/10/main/pg_hba.conf
	sudo sed -i '96s@127.0.0.1/32@0.0.0.0/0@' /etc/postgresql/12/main/pg_hba.conf
	/**
	* Simple program to POST a HTTP request
	*
	* see:
	* https://docs.postman-echo.com/?version=latest
	* https://aticleworld.com/http-get-and-post-methods-example-in-c/
	* https://stackoverflow.com/questions/11208299/how-to-make-an-http-get-request-in-c-without-libcurl
	* https://stackoverflow.com/questions/22077802/simple-c-example-of-doing-an-http-post-and-consuming-the-response
	*/
	#include <iostream>
	#include "include/libnpy/npy.hpp"
	#include "arm_compute/runtime/NEON/NEFunctions.h"

	#include "arm_compute/core/Types.h"
	#include "arm_compute/runtime/Allocator.h"
	#include "arm_compute/runtime/BlobLifetimeManager.h"
	#include "arm_compute/runtime/MemoryManagerOnDemand.h"
	#include "arm_compute/runtime/PoolManager.h"
	#include "utils/Utils.h"