PHP - How to implement queues?

Question

PHP

There is a script that starts converting video to different resolutions from one file. How can you make the conversion happen like this: 1000x800 -> 800x600 -> 600x400 and so on, that is, first from the original file to a lower quality, and only then convert the resulting file to an even lower quality? All this should happen in the background.

Answer 1

There are queue servers for queues. Alternatively, check out Gearman. For information habrahabr.ru/post/142210/.