SlingStudio Live Streaming App not connecting to AWS IVS stream URL.

Are you sure that Sling Studio support RTMPS? Also RTMPS uses Port 80 not 1935 FYI.

You may want to first try the RTMP connection from SlingStudio to IVS, and see if that works.

If OBS and StreamLab are able to connect to IVS using RTMPS, then it is likely the SlingStudio stream destination is not properly configured. Each RTMP(S) setup has slightly different config requirements for the URL and Stream Name/Key. Perhaps try ending the destination url as '. . .video.net:443' and set the Stream Name/Key to 'app'. Also try with and without the '/' in the destination or Stream Name/Key

I've tested many devices / software products using IVS Live and all I can say is: it's hit or miss. Connections seem to always work from OBS and Mac / PC desktop applications, but once you get into lesser known programs, mobile and especially Android, it's not stable. I have yet to be able to connect on Android mobile. I've used the same software that had performed well on Mac without success on Android. My advice: test it. If it doesn't connect, move on to another product. I have a list of Android based streamers that will not work if you want them. Thanks.