Negadoctor : Introduce slide film mode #988

Job	Run time
Win64.UCRT64.skiptest.Debug.Ninja	14m 3s
macOS.${{ matrix.compiler.compiler }}.${{ matrix.build.xcode }}.${{ matrix.target }}.${{ matrix.btype }}.${{ matrix.generator }}	0s
Win64.UCRT64.nofeatures.Debug.Ninja	21m 18s
Linux.noble.GNU14.skiptest.Debug.Ninja	5m 27s
Win64.UCRT64.skiptest.Release.Ninja	14m 33s
Linux.noble.GNU14.nofeatures.Debug.Ninja	4m 36s
Win64.UCRT64.nofeatures.Release.Ninja	22m 55s
Linux.noble.GNU14.skiptest.Release.Ninja	6m 44s
Linux.noble.GNU14.nofeatures.Release.Ninja	4m 58s
Linux.noble.LLVM16.skiptest.Debug.Ninja	6m 14s
Linux.noble.LLVM16.nofeatures.Debug.Ninja	4m 41s
Linux.noble.LLVM16.skiptest.Release.Ninja	7m 1s
Linux.noble.LLVM16.nofeatures.Release.Ninja	6m 22s
	1h 58m 52s

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