I'm using only "Windows Merit" options.
There is probably then either some problem with your installation of Haali's renderer, or something wrong with the Windows Merit system in MC. I'd guess the latter, but I'm not sure. I don't have Haali's renderer installed anywhere to test it.
1. Haali use better the memory on the video card.
2. Madvr is not Hardware decoder. (at least when i test it long time ago.)
3. I think Haali + CoreAvc is strong combination.
4. I don't like the way how MadVr jump from exclusive to window mode (flickering)
5. In some movies MadVr cause to LipSyn problem.
1. I don't know about this... All of my video cards have plenty of vRAM, so it has never been a serious issue for me. Do renderers even
make heavy use of vRAM? They aren't loading any textures or anything.
2. madVR is not a decoder, it is a renderer. I'm not sure what you mean here.
3. That's fine.
4. This is VERY easy to fix. Disable Exclusive mode in madVR. I don't like it either, so I turn off exclusive. You only have to turn it off once.
5. I haven't seen this. You may be running it on too slow of a PC to handle it.
Something else I should mention... You are certainly free to use the "not-recommended" Windows Merit system. And, in theory, it should work properly for people who need to use it. However, I wouldn't count on a lot of improvements in this area beyond getting it working like it did in MC15. This is essentially now the "deprecated" method in MC for selecting video filters. If you have problems here (beyond actual bugs where it doesn't work the same as it did in MC15), you are likely going to have trouble getting help on this. It is essentially unsupported (again, once we are sure it is back to "normal").
I would strongly recommend that you try Red October Standard (with Additional Filters) instead, and just swap in CoreAVC where appropriate (and try adding Haali's renderer there too if you want to use it). I know CoreAVC works fine this way. I'm not sure about Haali's renderer, but if it doesn't, they can probably add it to the whitelist unless there is a specific problem with it.
The Red October system works quite well now, and is very high-quality (even in Standard Mode).