Deepstream installation for Tegra/ Xavier

I have flashed my jetson xavier with jetpack 4.2 recently. From certain discussions over the forum I got to know that Nvidia is in process to release a new Deepstream version for Jetpack 4.2. Would I have to wait then for Deepstream 4.0 release to build intelligent video analysis application or I can start with deepstream 3.0 and jetpack 4.1?
Also, I want to build an application for IVA on xavier so can anyone please help me with the installation steps of deepstream and how to deploy the pipeline of video analysis on Xavier?
Any other step post flashing that I should keep in mind?

We suggest you get DeepStream SDK 3.0 and check the documents first. DeepStream SDK is based on gstreamer and you can also check

It should give some basic information.