AniEnc

Cross-platform tool for converting and resizing animations, powered by Magick.NET and CliFx.

Implemented features

• Conversion (to any format supported by ImageMagick)
• Resizing (px / % / auto, various interpolation algorithms)
• GIF optimization (all options available in Magick.NET)
• Coalesce (by default when resizing)
• Image enhancement

System requirements

• Any platform supported by both .NET and Magick.NET
  • On x86/x64, Windows/Linux/macOS should all work
  • ARM is not fully supported
• .NET 6.0 Runtime
• (optional) FFmpeg installed to $PATH
  • This is required for some formats such as WebM, APNG
  • On Windows, I use media-autobuild_suite to build FFmpeg

How to use

Usage: dotnet anienc.dll <input> [<options>]

To convert a GIF to WebM: dotnet anienc.dll test.gif -f webm

To resize a GIF: dotnet anienc.dll test.gif -r 640 480 -f gif

To optimize a GIF: dotnet anienc.dll test.gif -p 2 -f gif

(for single-file builds, you may replace dotnet anienc.dll with anienc in the above examples)

Unique features

AniEnc has support for converting Ugoira. These are animations from Pixiv, downloaded with a tool such as PixivUtil2. Two files are required, .zip and .zip.js - specify one of them as the input and the tool will find the other one automatically.

Future plans

• Better resizing options (fit)
• Noise reduction algorithms
• Extra support for JPEG XL animations (one of the initial goals of this project, as soon as ImageMagick has support)
• Simple timing adjustments
• Cutting
• Cropping
• Converting to/from individual frames