Animated_dial with custom image ESP8266MOD not working

[hansaplasst]

I want to load this custom image into an ESP8266 connected to my TFT display.

I'm using the example Animated_dial.ino, encoded the image with https://tomeko.net/online_tools/file_to_hex.php and replaced the PROGMEM in dial.h

My image (above) is smaller in size than the default image in dial.h. I am able to display the default image. But for some reason it is not working with my image. I've tried several. None of them are working. What am I doing wrong?

TFT Display: (1.28 Inch LCD Module Round RGB 240*240 GC9A01)
ESP8266MOD

[hansaplasst]

I've found a solution.

Looks like it has something to do with the jpeg format. I've saved the image without the progressive option enabled (using Gimp).
It's working now.