You're welcome. That is what those image sets were for. I was really happy Thomas Davies added quantization matrices to the spec, because if he hadn't, I would

You're welcome. That is what those image sets were for. I was really happy Thomas Davies added quantization matrices to the spec, because if he hadn't, I would have had to. Fortunately, he did a good job. I am glad someone is finally using them. Don't sleep on per-segment quantizer deltas, either.