I’m using Exoplayer 3 along with the IMA SDK. I need to show ads at specific times. Currently when I show the ads, they always appear at the beginning of the video.

I currently have AdsLoader and DefaultMediaSourceFactory integrated.

As data I have the URL of the ad and the second one in which it will be shown. All this within a list ("tag_url","start")

Does anyone know how I can show those ads at any time I want (for example at the 30th and 270th second)?