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Yoan Mollard ymollard

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ymollard / logs_is.md
Last active December 3, 2017 16:29
Logs IS

Comportement des logs

Logs sous forme de liste d'événements stockés en mémoire vive à partir du clic sur "Touchez l'écran" jusqu'à l'un des trois événements ci-dessous qui déclenche l'enregistrement du fichier en JSON sur carte SD :

  • Timeout sur n'importe quel écran (timeout de 1min, cf le schéma au crayon de papier dans les specs AEI)
  • Clic sur "Arrêter" (event avec "choice": "abandon")
  • Partage Facebook réussi

En cas de I/O Error ou bien SDCard inexistant, ignorer silencieusement l'enregistrement des logs (ne pas crasher).

@ymollard
ymollard / change_MAC.md
Created November 13, 2017 16:46
change MAC address

sudo ifconfig eth0 hw ether a0:1d:48:0d:ae:f5

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ymollard / gear_360_scan
Created September 16, 2017 17:27
$ sudo nmap -sS 192.168.43.1 --osscan-guess -O
Starting Nmap 7.01 ( https://nmap.org ) at 2017-09-16 19:26 CEST
Nmap scan report for 192.168.43.1
Host is up (0.040s latency).
Not shown: 997 closed ports
PORT STATE SERVICE
53/tcp open domain
7676/tcp open imqbrokerd
9001/tcp open tor-orport
@ymollard
ymollard / systemd_history.md
Created June 26, 2017 13:37
Read SystemD history 
sudo systemctl status apex.service -l  # Summary of the execution and success/failure state
sudo journalctl -u apex --all  # Displays the full log
# Long version: journalctl _SYSTEMD_UNIT=apex.service --all  # Full output
@ymollard
ymollard / two_pass_ffmpeg.md
Created May 19, 2017 14:45
Two pass FFMPEG

Your video is 10 minutes (600 seconds) long and an output of 200 MiB is desired. Since bitrate = file size / duration:

(200 MiB * 8192 [converts MiB to kBit]) / 600 seconds = ~2730 kBit/s total bitrate 2730 - 128 kBit/s (desired audio bitrate) = 2602 kBit/s video bitrate

ffmpeg -y -i input -c:v libx264 -preset medium -b:v 2600k -pass 1 -c:a aac -b:a 128k -f mp4 /dev/null
ffmpeg -i input -c:v libx264 -preset medium -b:v 2600k -pass 2 -c:a aac -b:a 128k output.mp4
@ymollard
ymollard / rename_ROS_pkg.md
Last active June 23, 2017 16:44
Rename ROS package
  • Replace upper case and lower case name occurences with KFilereplace on files: *.md;*.py;*.launch;*.xml;*.txt;*.srv;*.msg;*.action
  • Replace name occurences in folders and files: 
    shopt -s globstar  # Enables **
rename 's/old_name/new/' **  # Run it several times until there's no new error
@ymollard
ymollard / autoipd.md
Created December 17, 2016 20:59
Getting an auto IP

sudo /usr/sbin/avahi-autoipd -w eno1

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ymollard / generate_circle.ipynb
Created October 13, 2016 16:39
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@ymollard
ymollard / freecad_svg_to_board.md
Last active August 28, 2016 21:56
Freecad to Inkscape board
  1. Objet vers Chemin
  2. Redimensionner à L+0.1, H+0.1, épaisseur de ligne = 0.1
  3. Dégrouper
  4. Sur chaque couple de noeuds superposés, les sélectionner, ils disparaissent
  5. Maj + J sur chaque couple
  6. Dupliquer la forme globale
  7. Appliquer un miroir (attention : est-ce symétrique ?)
  8. Sur chaque segment partagé de la forme dupliquée -> Alt+Suppr (pas Alt Gr)
  9. Lors de la dernière suppression, la largeur est réduite de 0.05
  10. Aligner verticalement
@ymollard
ymollard / profile_module.sh
Created August 22, 2016 18:07
Profile a python module and plot
pip install pyprof2calltree
sudo apt-get install kcachegrind
python -mcProfile -o module.cprof $(python -c 'import runpy; print runpy.__file__.rstrip("co")') the.module.to.profile
pyprof2calltree -k -i module.cprof