Gentoo's Bugzilla –
Attachment 766064 Details for
Bug 834402media-video/ffdiaporama-2.2_pre20140701-r2 with ffmpeg-5.0: engine/cDeviceModelDef.cpp:729:5: error: ‘avfilter_register_all’ was not declared in this scope; did you mean ‘avdevice_register_all’?