BuilderOption Bit Depth Reduction - Moon70/APNG-builder GitHub Wiki

Default bit depth is 8 bit for each colour component (red/green/blue), which is 24 bit truecolour.

Reducing the bit depth decreases both filesize and image quality.

This is a lossy transformation.

Examples:

ApngBuilder builder = new ApngBuilder();
builder.setNumberOfTruecolourBits(6);

new ApngBuilder().setNumberOfTruecolourBits(5).buildPng(some-filearray, 500).savePng(new File("the-APNG-filepath"));