/gems/ruby-vips-2.1.4/lib/vips/operation.rb:218:in `initialize': VipsOperation: class "gifsave" not found (Vips::Error)

[serhiihiba]

On macos it works, on ubuntu not

[jcupitt]

Hi @enotikalt,

gifsave relies on the cgif library, so you need to build libvips against that:

https://github.com/dloebl/cgif

brew does this, but the standard ubuntu package does not. You'll need to build libvips yourself if you need this feature.

You can use write_to_file instead: this will examine the filename suffix and pick the best saver it can find. Without cgif, this will fall back to the slower and more memory hungry imagemagick.

[serhiihiba]

I'm not sure I understand, how I can build libvips with cgif?

[jcupitt]

You'd need to compile the thing from source.