canvas VS go-gst

I wanted to share a recent large update to https://github.com/tdewolff/canvas, which is a vector graphics library written in Go to create images, PDFs, SVGs, OpenGL, etc. using vector drawing operations. Especially I wanted to show two new exciting features:

It appears that there's a port of Cairo to Go which also targets webassembly. https://github.com/tdewolff/canvas

https://github.com/tdewolff/canvas/blob/master/examples/opengl/main.go can draw primitves but i think it would be a bit hard to do event based animation

Yes! See https://github.com/tdewolff/canvas/tree/master/examples/gonum-plot for an example using gonum-plot. You should be able to plug-and-play to use the canvas library!

I don't know how low level you want to go, but assuming you don't want to re-implement video codecs then GStreamer is probably a good place to start, it allows you to create modular video pipelines and it has Go bindings (although I've not personally used them).

For the latter I have gstreamer bindings here https://github.com/tinyzimmer/go-gst , but you could potentially also implement yourself with other libraries tuned to the purpose.

I noticed you have some gstreamer examples which is awesome! In case you are interested, I maintain bindings also (and the app libraries are included) if you wanted to remove some of that internal boilerplate :).

If CGO isn't off the table, gstreamer can do some interesting stuff with the app library. I have bindings here. This example plays with "dynamically" producing image frames.