Getting blank screen when streaming to Hearthis.at need help

[DJboutit]

I am running my Cellphone to OBS with IPcam app and I am streaming video to Hearthis on Hearthis I am just getting a blank screen shows my stream is being received need help any ideas what could be causing this problem?? Running the newest version of OBS on Windows 11.

 

[DJboutit]

I figured out the problem Hearthis only allows h264 stream. I have another problem I am streaming at 1080p 8500 bitrate and the screen flashed 2 or 3 time every 15 to 30 seconds why it is doing this??