artwork

Documentation

Overview

Package artwork scales podcast cover art to Apple Podcasts specifications. The encoder embeds the scaled bytes as an attached-picture stream for cover-capable formats.

Index

• func ScaleCoverArt(inputPath string) ([]byte, error)

Functions

func ScaleCoverArt

func ScaleCoverArt(inputPath string) ([]byte, error)

ScaleCoverArt scales cover art according to Apple Podcasts specifications:

• Images < 1400x1400: upscale to 1400x1400
• Images 1400x1400 to 3000x3000: use as-is (no scaling artefacts)
• Images > 3000x3000: downscale to 3000x3000

It accepts PNG, JPEG, and GIF input. To avoid needless recompression an in-spec PNG returns its original bytes untouched; scaled images and non-PNG inputs re-encode to PNG.