My only direct interaction with ffmpeg and libavcodec/libavformat has been from a user and developer stand point. Most of it has been very poor, the code works well, but their API both the C interface and the CLI could be a lot better.
This should be deployed with any new fresh ffmpeg install.
The filtering code is still unstable due to what's explained in the blog post...
To be honest, the biggest problem I had was that searches would return too many out of date code snippets and sample code on other sites that didn't match the exact version I was using, so it wouldn't work for me.
Other than that, once I got it working, it was awesome.