| #include <pthread.h> | |
| #include <stdio.h> | |
| #define PRODUCER_COUNT 1 | |
| #define CONSUMER_COUNT 1 | |
| #define THREAD_COUNT (PRODUCER_COUNT + CONSUMER_COUNT) | |
| #define QUEUE_SIZE 64 | |
| // Let's go the easy way and keep a gap between head and tail when full. |
| # Default session directory. Make sure you don't run multiple instances with the same dir. | |
| session = ~/torrent/session | |
| # Maximum and minimum number of peers to connect to per torrent. | |
| min_peers = 50 | |
| max_peers = 400 | |
| # Same as above but for seeding completed torrents (-1 = same as downloading) | |
| min_peers_seed = 20 |
| server { | |
| index index.php; | |
| set $basepath "/var/www"; | |
| set $domain $host; | |
| # check one name domain for simple application | |
| if ($domain ~ "^(.[^.]*)\.dev$") { | |
| set $domain $1; | |
| set $rootpath "${domain}"; |
This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
| // A small SSH daemon providing bash sessions | |
| // | |
| // Server: | |
| // cd my/new/dir/ | |
| // #generate server keypair | |
| // ssh-keygen -t rsa | |
| // go get -v . | |
| // go run sshd.go | |
| // | |
| // Client: |
| # kudos to dzaku at consolechars.wordpress.com | |
| ### MOUNT qcow2 image with lvm partitions | |
| # ensure nbd can handle that many partitions | |
| sudo modprobe nbd max_part=8 | |
| # present image as block device through NBD | |
| sudo qemu-nbd --connect=/dev/nbd0 <image.qcow2> |
Capturing video from the rpi camera with ffmpeg can vary from less than 5% to 100% of the CPU (rpi zero) depending on ffmpeg using the hardware acceleration or not.
On many github issues one finds the suggestion of using h264_omx codec to use the gpu - but it does not ship with the default ffmpeg on Raspbian.
Instead I found that one can use the v4l2 driver provided by raspbian to get hardware accelerated h264 output. Also setting the video size will save one from using a (cpu) scale filter.
capture h264 video from rpi camera
| HTTPPort 8090 | |
| HTTPBindAddress 0.0.0.0 | |
| MaxHTTPConnections 200 | |
| MaxClients 100 | |
| MaxBandWidth 500000 | |
| CustomLog - | |
| <Feed camera.ffm> | |
| File /tmp/camera.ffm | |
| FileMaxSize 200M |
| ### JHW 2018 | |
| import numpy as np | |
| import umap | |
| # This code from the excellent module at: | |
| # https://stackoverflow.com/questions/4643647/fast-prime-factorization-module | |
| import random |
