Movistar Video on Demand
Regular Movistar TV channels travel over Multicast/UDP, but everything you ask for yourself (a movie from the video store, rewinding what is currently on, a cloud recording) travels over Unicast, and that is where a home-made Linux router chokes. In this post I explain how that traffic works today, measured with the TV switched on, and what you need to put on the router to make it play. There is a surprise: not everything uses RTSP anymore. More than a decade ago I wrote Video on Demand for Movistar, the first time I wrestled with this on my Linux router. Recently I felt like checking whether igmpproxy and the kernel RTSP helper were still needed, I took another look at the whole thing, and this post is the result. Yes, I was bored and decided to do an academic study. …