https://www.youtube.com/watch?v=_JwMuvFVMsM

It turned out the module as on the picture already has psram) The psram was disabled in the menuconfig by default. So it looks like all those esp32-cam boards come with 4mb psram :) Regarding pixelformats and resolutions - I had problems with receiving rgb and grayscale format from dma. Camera modul...

This board from OP has psram (64Mbit) also esp-eye is with psram. Somehow I bought one of the first prototype boards without psram... Now looks like they are selling upgraded ones - with 4mb psram but either way espressif warns that writing to psram is not particularly fast - whatever that means. T...

Looking at this code (for ESP-EYE board) https://github.com/espressif/esp32-camera/blob/165a47fe6a7c76daf23fa40512ae4a90a994e938/driver/camera.c They use another and different compression ratio calculation. Playing with camera code I discovered that those ratios are responsible for artifacts and buf...

chegewara wrote: ↑

Tue Jan 08, 2019 3:32 pm

https://github.com/donny681/ESP32_CAMERA_QR/pull/4

Yes, it is working! That bug fix for jpeg quality completely corrected whole image at 20Mhz !
Now all works like a charm!
Thanks!

esp-eye has also extra psram )

JPEG quality parameter is in fact jpeg compression rate. Higher value is higher compression and lower image quality. Its bug in original code on github for this board.

So what code is bug fixed one? Can you post a github link?
I assume it is in camera.c

Finally I could capture SVGA JPEG format. There is a small limitation though - the jpeg quality cannot exceed 30%. Unfortunately that camera cannot run with external clock of 20Mhz as it is by default. Tops 10Mhz. Maybe it is related to powering the peripherals like ledc. Wonder if SPI or RMT would ...

After some tests I discovered some instability related to powering this board. It was triggering brownout detection until I changed to pure power source instead of ttl usb to serial adapter supplying power. Apparently it needs some more current for camera and wifi. I am not sure what pin is good to ...

I am using same camera and this code:
https://github.com/donny681/ESP32_CAMERA_QR

I removed all references to http and qr recognition - just reading frames and get "frame buffer allocation failed"

I think I am using older idf though