Some months ago and also today I met error when building ffmpeg. The error was :
...
fftools/ffplay_renderer.c:118:11: error: unknown type name _AVVulkanDeviceContext_; did you mean _AVDRMDeviceContext_?
118 | const AVVulkanDeviceContext *hwctx = avhwctx->hwctx;
| ^~~~~~~~~~~~~~~~~~~~~
| AVDRMDeviceContext
fftools/ffplay_renderer.c:121:10: error: request for member _lock_queue_ in something not a structure or union
121 | hwctx->lock_queue(avhwctx, qf, qidx);