ref: 7c20afca72c6d4f856556a386312072ddde5f826
parent: 31f2fad7a119fbd09485233b0794be6cbdaa6c31
author: Sigrid Haflínudóttir <ftrvxmtrx@gmail.com>
date: Mon Sep 21 09:42:55 EDT 2020
ebml/ogg: use discard padding, codec delay and seek preroll to calculate granule position