Trouble consistently timing flash with fully exposed frame. #4
Description
First off, cool project you've worked on!
I've been trying to recreate your results on an ESP32-CAM (also the AI Thinker model), but using the ESP-IDF framework instead of Arduino. I also use the RMT peripheral, with a 20 ms delay and a 0,1 ms flash. I learnt that the exposure setting dictates the maximum number of rows that are exposed simultaneously, as my vertical resolution consists of 600 rows (cropped) I set the exposure >600.
A major difference is that I'm not using the web interface, and I would like it to synchronize the flash with a fully exposed frame at ~10 fps. At the moment 1/5 of my pictures are completely exposed while using the flash.
There seems to be some oddities:
- The only real way to know when it is capturing a frame is by emptying the frame buffer with .fb_count = 1, it will take a single picture after this.
- Capturing a frame may take anywhere between 20 to 90 ms.
Especially the last item makes it difficult to consistently time the flash with a fully exposed frame.
Did I miss something about your approach? Would you happen to know any workaround?