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Apologies for the double-post but, at least for me, your script files make no difference* compared to the default downscaling.

*ok, it technically makes a difference, but it's so ridiculously small that it makes me wonder why such a difference even occurs because the result is still 99.9% the same and the difference is way less than a change in scaling algorithm would result in.

Mystery, could you just post the according snippets of code for using bicubic and spline?  As I alluded to earlier, coding is a major weak point of mine, so it's not immediately obvious to me where and what I'm supposed to do to achieve what you describe...

I mean, I know how to comment out stuff, but dang it, everything I tried didn't work - and yes I restarted SVP.

Well it seemed odd that, as soon as I made a second post, it got a reply.  Are you telling me it was purely a coincidence that your first post in this thread happened to occur only 15 minutes after my second post?

Well for one thing, I never even thought it'd be in the AVS script.  Anything code-related is not my forte, so that would also mean I wouldn't know what kind of things would be part of the AVS script and what things would be part of the SVP program.

If you just want the video profiles (which, at least for me, is usually the case) you can just make a copy of "SVP 3.1\Profiles" instead.

This is also quite useful when doing various performance tests where it's easier to just have a single or only a couple profiles for various comparison reasons.

Well, I have come across one YouTube video that does not seem to be particularly faster on SVP 3.1.7 compared to 3.1.6 - particularly the first minute or so of this video when it's zooming in and out:
https://www.youtube.com/watch?v=wOP8XudHqr4

But what is your exact CPU model?

Regarding the performance of APUs, there's a reason I mentioned Zen APUs - I believe the inadequate level of traditional x86 performance of current AMD APUs is largely the reason why there is minimal development as a whole regarding HSA since, if the traditional x86 performance isn't there, then performance-focused developers won't even own the APUs in question and therefore will not develop for it, and even if they did own it they could very well see it as a "why bother?" with the logic of an APU owner clearly isn't interested in CPU performance because otherwise they would have purchased an non-APU product in the first place (though technically even Haswell is an APU).

Basically, it's very difficult to convince developers to develop for something new when the competition is considerably better at the traditional method to the point that your competitor is the general "go to" product thereby resulting in a lack of developers even owning your product.

Oh, and fun fact: Haswell is quite a bit faster than Sandy Bridge at all-things emulation for some unknown reason.

I checked it myself via MPC-HC's File->Properties->MediaInfo...

Personally I'm more interested in the likes of HSA seeing how SVP is already capable of using GPU-acceleration.  However, it looks like HSA as a whole will receive very minimal interest from software developers until Zen APUs are a thing.

Oh btw, regarding your recommendation about complicated + weak masking, one use-case where that is definitely worse artifact-wise is when the content has thin moving lines; on standard the artifacting on the lines is merely areas where the line simply doesn't exist, but on complicated you instead get weird squiggly lines.

The rain in this video is a great example of that, particularly while the camera moves around:
https://youtu.be/tcWJFQsSKT8

Yup, that fixed it!

So that combined with the AVS MT dll and the SVPMgr.exe hotfix seems to fix all three of the issues I've been having...though I'll need more time to confirm the crash-on-seek issue since it's random.