LMS is written in Perl, so it doesn't need to be compiled on different platforms. Just make sure you fetch all the dependencies and you should be good.

Ask the omxplayer folks (popcornmix in particular).

https://github.com/popcornmix/omxplayer

You could use a single HTML page to display both the video and other html page. Just use iframes.

There are free online tools for this as well like splash-tiles.com

Make sure you have hardware acceleration enabled in Chrome https://www.raspberrypi.org/forums/view ... 3&start=25

If you are familiar with building C code, then you can modify omxplayer to do this easily. Just trigger the GPIO with system calls whenever the current video timestamp is at certain values.

For the video wall to work properly with video motion, you actually have to keep the frame syncs of both video ports in sync (vertical sync is in phase and exactly the same frequency). You should talk to the GPU coders (Popcornmix) to see if that is possible on the PI4. It requires hardware support,...

How is the performance of the web browser (chrome) verses in Linux?