libass VS cargo-geiger

TIL there's a library called 'libass'

Not Rust but libass :D

Dunno ... I'm kinda glad these guys didn't call their SSA/ASS implementation "open"

I see libass gets talked about on Reddit often enough.

libass is similar. For example, in the header:

libass

Using softsub allows you to reduce server usage as you only needs to deploy one video and multiple subtitles, but implementing it is hard: you can use this portable renderer, but just because it compiles to multiple platforms it does mean it run well on those, it might crash in low-end devices (there is even a Crunchyroll episode that loads multiple fonts at the same time, place a lot of texts moving and crash my phone).

Instead of looking at the crates themselves, you might want to check your (or others') Rust application with https://github.com/rust-secure-code/cargo-geiger to get a sense of effective prevalence. I also dispute that the presence of unsafe somewhere in the dependency tree is an issue in itself, but that's a different discussion that many more had in other sub-threads.

There's still plenty. Run cargo geiger on any of your projects and see for yourself.

On point 2, the answer is cargo geiger, and judging how much memory safety you need for a given project.

You can use cargo-geiger or cargo-crev to check for whether people you trusted (e.g. u/jonhoo ) trust this crate.

The amount of unsafe code is also a factor. cargo geiger is a handy tool for measuring it.

We have cargo-geiger that does just that.

For that, I believe you need to use cargo-geiger[0] and audit the results.

[0] - https://github.com/rust-secure-code/cargo-geiger

cargo-geiger is a subcommand you can install which will check all the crates in your dependency graph for unsafe blocks and print out a report (which also shows if a crate has #![forbid(unsafe_code)] or not). You can then inspect those crates' sources to judge their use of unsafe for yourself. I don't think it has a "check" mode that simply errors if your dependency graph contains unsafe though, it's more about just collecting that information.

wrt to memory safety, keep in mind that many rust crates use "unsafe" internally. There are tools available that can find these such as cargo-geiger. So I would suggest to avoid unsafe deps as much as possible. Since they cannot be avoided entirely, it is a good idea to keep a list of unsafe deps.