Probably talking about libav. https://en.wikipedia.org/wiki/Libav has some pointers.

One that have the same binary name as yours for compability reasons, but then proceeds to be not so compatible with slight command line options. Thus, made a whole lot of confusion because people didn't expect that depending on what distro they were using they could be using similar but incompatible software with the same executable filename.

These weren't un-executed ideas, though. I think it lines up very well with my general sense that the best way to get to a really good implementation of something is to publish one that's lacking in some way that annoys people. Then you have an idea plus something people can contribute work to improve.