WP Smush might be a bit more popular than OptiPNG. We know about 2 links to it since March 2021 and only 2 links to OptiPNG. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Did you compare to PNG crush and optipng? Those are what I used to use because they're easily installable Linux/brew packages. Source: about 1 year ago
Assuming your frames are PNG files, you could use a lossless optimizer like optipng to try if their size can be reduced. I prefer oxipng, which is faster and multithreaded, and seems to have more active development. Source: over 2 years ago
There are plenty of image optimizers available for WordPress users. Which one is right for you? It depends on how advanced you want to get with your optimization. For the vast majority of users, EWWW Image Optimizer is probably the best option out there. It’s fast, reliable, and easy to use. Smush Pro is the best choice if you need something more advanced. Source: about 2 years ago
I used to use WP Smush Pro for that (and probably still would if I was still in the WP world). Source: over 2 years ago
ImageOptim - Faster web pages and apps.
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
pngquant - command-line utility and library for lossy compression of PNG images
WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
JPEG Resampler - Jpeg Resampler, nástroj pro konverzi a změnu velikosti obrázků, snadné použití, zdarma