São Paulo y alrededores
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I lead teams that have built a scalable media streaming Brazilian CDN, live streaming…

Artículos de Leandro

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Publicaciones

  • Implementing Google's "Did you mean" Feature In Java

    http://www.infoq.com

    Search engine s often misspell search for a variety of reasons varying from keyboard problems (a key not working), to unfamiliar international names (for example Sigmund Freud), changing one letter accidentally (Sinpsons), or adding one more letter (Frusciaante). Google's search engine includes a feature now familiar to many web s - "Did you mean" - which provides alternative suggestions when you may have misspelled a search term.

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Proyectos

  • CDN Up and Running

    This project aims to build a body of knowledge on how CDNs work by coding one from "scratch". The CDN we will design uses: nginx, lua, docker, docker-compose, Prometheus, grafana, and wrk.

    We'll create a single backend service and expand to a multi-node, latency-simulated, observable, and testable CDN. In each section, there are discussions regarding the challenges and trade-offs of building/managing/operating a CDN.

    More information on…

    This project aims to build a body of knowledge on how CDNs work by coding one from "scratch". The CDN we will design uses: nginx, lua, docker, docker-compose, Prometheus, grafana, and wrk.

    We'll create a single backend service and expand to a multi-node, latency-simulated, observable, and testable CDN. In each section, there are discussions regarding the challenges and trade-offs of building/managing/operating a CDN.

    More information on https://github.com/leandromoreira/ffmpeg-libav-tutorial

  • linux-network-performance-parameters

    Learn where some of the network sysctl variables fit into the Linux/Kernel network flow.

    Otros creadores

  • Introduction to video technology

    A gentle introduction to video technology translated into many languages. Although it's aimed at software developers/engineers, I made it easy for anyone to learn. The goal is to introduce digital video concepts with a simple vocabulary, many visual elements, and practical examples when possible and make this knowledge available everywhere.

    More information on: https://github.com/leandromoreira/digital_video_introduction

  • Redlock

    An implementation of a proposed distributed lock algorithm using Redis. More than 25M s.

  • Sorteio

    Using ruby and rails to development, made under agile methods.
    Pilot project to improve my knowledge.

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  • JPCSP

    - actualidad

    A PSP emulator written in Java.

    Otros creadores
    • gigaherz
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  • Clappr

    -

    Clappr is an extensible media player for the web, it's open source. It works with the main browsers and devices (mobile), it was built in a plug-ins based architecture, allowing dev/s to create plugins in uncoupled way. Clappr is capable of playing several video containers such as, mp4, hls, rtmp and others.

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  • Live Streaming Rio 2016 Olympic Games

    -

    The live streaming infrastructure for Rio 2016 Olympics Games. We used around 5.5 TB of memory with 1056 Us across two PoP’s located on the southeast of the country. The broadcaster input the signal through RTMP and it's transformed to HLS streaming which is stored at a Cassandra Cluster and then a lua+Nginx was used to serve and cache the content.

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  • Waiting Room

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    Queue system to forbid/allow access from s who has less/more bandwidth or if their ISP bandwidth is in extreme usage. It stores BGP (Border Gateway Protocol ) information (like autonomous system (AS), prefix) in Redis (powered with interval dataset data structure) to achieve fast retrievals.

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  • Sochi 2014: Winter Olympics Live

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    Build the infrastructure to hold live stream (hls) viewers, using several distributed system as Cassandra, nginx, redis, lua, python, ruby and others.

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  • Live Streaming Infrastructure for FIFA 2014 World Cup

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    Design and deploy the live video streaming platform / infrastructure for hundreds thousands of concurrent s at the peak. We used the HLS (HTTP Live Streaming) protocol for web and mobile devices. For this project we mostly used Python, Cassandra, Lua, Redis, C, Nginx, Docker and puppet for software provisioning.

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  • Sauron

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    A software to monitor quality of experience for live streaming video. It makes possible to track experience by observing several metrics like bitrate, dropped frames, location, bandwidth, number of rebuffers and session time.

    With these information it's more feasible to fix issues, improve the current solution and keep s engaged, for example, offer more specialized content.

    The final solution is a set of distributed system that was built using open source…

    A software to monitor quality of experience for live streaming video. It makes possible to track experience by observing several metrics like bitrate, dropped frames, location, bandwidth, number of rebuffers and session time.

    With these information it's more feasible to fix issues, improve the current solution and keep s engaged, for example, offer more specialized content.

    The final solution is a set of distributed system that was built using open source technologies like: logstash, graphite, redis, elastic search, nginx, angular, rails, ruby, lua, python and puppet for provisioning.

    Otros creadores

  • Globo.TV PremiereFC

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    A Restful API for live data about football matches.

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  • GAP Inc. Direct E-Commerce Platform

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    Building systems to sales, making improvements on code and infrastructure, and deploying / introducing / coaching new technologies.

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  • VejaSP

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    An entertainment website for the city of São Paulo. Build with several API's with distributed teams.

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Idiomas

  • English

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  • Portuguese

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  • Spanish

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