First things first, dcv is added to the dub-registry, so use this.
https://code.dlang.org/packages/dcv ```json "dependencies": { "dcv": "~>0.3.0" } ```For ffmpeg the binding tells you what to add for search paths in the lflags directive.
https://github.com/ljubobratovicrelja/ffmpeg-d#adding-to-dubAll I can suggest is make sure you have the right dev packages for ffmpeg installed and findable by the linker.