[BUG] extract-canim.py not handling Audi file correctly

[mrfixpl]

Describe the bug
When running the extract-canim.py on a RS3_5_Tuerer_quattro_NavigationPlus.canim file, output file img_0.png seams to be incorrect.
Script output reports file size 1536000 bytes, when output file img_0.png is actually 11159 bytes and visually exactly the same as file img_1.png.

To Reproduce
Steps to reproduce the behavior:

1. Run python3 ~/extract-canim.py RS3_5_Tuerer_quattro_NavigationPlus.canim ~/output
2. Check output files img_0.png and img_1.png.

Expected behavior
img_0.png file should be the largest one, should containt color car image instead of black mask.

Screenshots

Firmware(please complete the following information):

• Brand: Audi
• Hardware-type MIB2High
• Version 5098

[Mich795]

Hello, check this:
https://github.com/Mich795/CANIM-Mod-Tool

[mrfixpl]

Extract works all right. But compress doesn’t do a thing for me. No error, just nothing when I press the „compress images” button.