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LTVA1 / flipper-zero-video-player

An application for playing videos (with sound) on Flipper Zero.
MIT License
123 stars 5 forks source link

Grayscale emulation possible? #14

Open jose1711 opened 3 months ago

jose1711 commented 3 months ago

Would video player be able to emulate grayscale as in https://www.reddit.com/r/flipperzero/comments/10uocof/update_on_grayscale_emulation_more_details_in/ or https://www.reddit.com/r/flipperzero/comments/10qztme/my_next_project_is_grayscale_emulation_for_the/?

LTVA1 commented 3 months ago

I am not sure, because it requires precise timing while video player spends a lot of time reading data from SD card and drawing it. I was actually experimenting with alternating checkerboard pattern dithering, running it off hardware interrupt and with direct draw, but it still flickered no matter how I tried. I would ask the author of greyscale camera app to actually shoot a video showcasing the greyscale, since with appropriate shutter speed ypu can capture good looking photo of it, but in reality it most probably flickers.

By the way, the speed at which LCD pixels change their color depends on the temperature too.