Entries by Johann Savalle

shitty time reset procedure (src: twitter)

source NB: take with a grain of salt – but still some interesting tips. posted for reference #thread start: if you’re having a shitty time with your mental health and are low functioning i feel u & sympathise. here’s a list of potential actions for u to take to feel better/exist through it. try to […]

Set up a different an SSH key for git push for a give repository

ok so I add the following problem to deal with. Posted here for reference. Source Even if the user and host are the same, they can still be distinguished in ~/.ssh/config. For example, if your configuration looks like this: Host gitolite-as-alice HostName git.company.com User git IdentityFile /home/whoever/.ssh/id_rsa.alice IdentitiesOnly yes Host gitolite-as-bob HostName git.company.com User git […]

UX challenges – 7 rapid prototypinng

Rapid prototyping exercices Exercise 1: Mobile TV programs dashboard Scenario: when users login on the app what will they see, what can they do Goals: Engagement Exercise 2: Rapid prototyping of a live class Scenario: User is watch a live class – with interactive features Goals: interactivity with the teacher and / or other studens, […]


WebRTC Janus – CPU intensive

WebRTC is great Janus is a cool library (link if you never heard of it : github and good intro link) But boy is it CPU intensive. here are some links for the case you’re looking at ways to lower the damage Client CPU benchmark and how to improve it https://groups.google.com/forum/#!msg/meetecho-janus/ydGcbMt7IX0/LOGVIA6yjkAJ Performance analysis of the […]

5 talks to get up to speed on the JAMStack

Never heard of the JAMStack? Maybe not directly – but if you are doing web dev you have for sure heard of some of the players in this field, like Jekyll, Hugo, Jigsaw or GatsbyJS just to name a few. Indeed monoliths CMS like WordPress or Drupal (just to name these two but Wikipedia list […]

SRS server – what it is – and install

What is it? source code on github From the website : SRS delivers rtmp/hls/http/hds live on x86/x64/arm/mips linux/osx, supports origin/edge/vhost and transcode/ingest and dvr/forward and http-api/http-callback/reload, introduces tracable session-oriented log, exports client srs-librtmp, with stream caster to push MPEGTS-over-UDP/RTSP to SRS, provides EN/CN wiki and the most simple architecture. Basically it is a simple way […]

RTMP & Transcoding

Some research I have made recently while working on a broadcasting module of an app. Just saving here some of the best link I have found – as backup and maybe of interest for some people. Obviously if you are looking for a super structured article – I am far from it at this point […]


Cicada 3301: An Internet Mystery

Cicada 3301 is an organization who used puzzles to possibly recruit codebreakers/linguists from the public. The first internet puzzle started on January 4, 2012, and ran for approximately one month. A second round began one year later on January 4, 2013, and a third round following the confirmation of a fresh clue posted on Twitter […]