@Marc_MERLIN the wire run is very short, it’s just on my desk. 1m at most. But still, it seems like noise, so I’m going to try and see what’s going on and will report back on the other thread.
@Marc_MERLIN is the Fastled allow interup is 0 ? How do you supply power to the strip and the esp ?
@Marc_MERLIN i am running 5904 leds with 16 parallel output with an esp32 missing/deleted image from Google+
@Yves_BAZIN that was not a stupid question at all it turns out. I replied in the appropriate thread, thanks for that.
@Marc_MERLIN does that mean that it’s working
@Yves_BAZIN https://plus.google.com/+MarcMERLIN/posts/XYU3xjDYRJM has details. Disabling interrupts fixes the problem, but it’s not a workable solution for me since i need interrupts for infrared. More details there.
@Marc_MERLIN I see indeed we had this discussion. The esp8266 in parallel output relies on writing to port at specific timing hence interrupts can mess it up easily. The implementation of @Sam_Guyer for the esp32 use dma hence not sensible to interrupts.
@Yves_BAZIN yeah, the 8 channel RMT device on the ESP32 definitely helps, no question there. It just seems tricky to get ESP32 working right. It took forever to get the first neopixel library even working at all on it due to how tricky it sems to be to use (I was one of the first arduino developers on ESP32 http://marc.merlins.org/perso/arduino/post_2017-01-16_IoTuz-Driver-for-our-ESP32-board-built-at-Open-Hardware-Miniconf-at-Linux_Conf_au-2017.html and http://marc.merlins.org/perso/arduino/post_2017-04-16_IoTuz-Driver-ported-to-Expressif-ESP32-WROVER-board.html ).
I also ported some other libraries to ESP32 at the time, like IR, adafruit neopixel, and some other stuff)
@Marc_MERLIN i have been working on esp32 since couple of month now and updated the library for 16parralel output. I personnally have no issue running ws2812 led strips with it. I drive around 6000pixels now. You should give it another try 
@Yves_BAZIN I totally believe you that ESP32 support is way better now than when I was first using it over a year ago and I had to port every other library to even work on it 
For now, I’ll freely admit that I was trying to see if I could still make things work with my ESP8266 since that’s what I’m already using to run my party shirt and pants, and as of right now I got it working ok.
I’m getting 100Hz on a 768 pixel panel, and I can run a 48 pixel strip on a different pin without glitches.
So, I think for now I’ll continue using it, fully keeping in mind that my ESP32 is what I should consider if I ever go with a more crazy project like yours (actually teensy 3.x would also be a worthwhile option, although I’ve been having issues with the arduino glue recently, and its complete lack of debugger is annoying compared to ESP32 that gives you at least a traceback).
@Marc_MERLIN totally in line with you. There are almost too many boards to follow all of them :). Can’t wait to see the results of your work. 100hz that is cool you can have great animations