Any H.264 decoder that doesn’t produce bit identical output is non-conformant to the spec; this was one of the big lessons of MPEG4 part 2, that you really don’

Any H.264 decoder that doesn’t produce bit identical output is non-conformant to the spec; this was one of the big lessons of MPEG4 part 2, that you really don’t want the drift that comes from repeatedly using “near enough” reconstruction as prediction in a loop. Well, he could be including YUV -> RGB conversion, which while the conversion matrix is specified, the required precision and chroma upsampling method are outside the scope of the spec.