Header files (or Doxygen), and the few official examples. Some of them use old and no longer recommended APIs/patterns, and have obvious problems as soon as you

Header files (or Doxygen), and the few official examples. Some of them use old and no longer recommended APIs/patterns, and have obvious problems as soon as you compile and use them without changing anything. I say this as someone who has extended and maintained a libav* language binding with similarly terrible documentation. I tried to write more examples for people. But the API surface is vast and resources are extremely scarce. Sometimes you just have to dig into actual production code of FFmpeg (the CLI side), mpv, etc. to see how other people use it.