ref: fac1a1afaa275d7a54da5b08e43751f45d3e322e
parent: 55d512c7a44a889f1d5f2a143c299f9e31bde094
author: Tristan Laurent <t.laurent@ateme.com>
date: Wed Nov 7 12:56:41 EST 2018
Add 'null' muxer in help For benchmark purpose you do not need to process decoded frames. The null muxer allow you to do that.