Originally Posted by: spinfold 
You're approaching this the wrong way.
I appreciate your concern, but, no, I'm not.
Within the constraints I'm dealing with, I can assure you that I'm going about this the right way.
Originally Posted by: spinfold 
Why can't you use a virtual PTZ controller on the original source?
Because it messes with the image.
The only way to not cut off the image is to zoom in. Which messes with the vertical composition of the image, which is sometimes overly tight as it is. In the ~15 years I've been doing this, I've had one person in memory who was too far away from the camera. Almost everyone else has been perfect, and a few have been too close.
I send positioning information with my confirmations, and it's far easier for guests to ensure they have adequate clearances above and below their head for my stylistic liking & audience preference than it is to ensure they're dead center.
Their environment often dictates where the camera is positioned, and where they are in relation to it.
When you do the type of interviews I do, the guests are doing you a favor and you take what they're able to offer and work around it if (and when) it's less than ideal.
I'm also dealing with max 720p Zoom inputs being recorded at 1080p in a 4K project. The last thing I need is to reduce their resolution further with a virtual zoom.
Additionally, the virtual PTZ functions the same as the regular PTZ and requires an explicit "stop" command that isn't compatible with controller knobs.
Originally Posted by: spinfold 
you have much finer and easier control than changing positioning and cropping of layers
Considering that the virtual PTZ, again, doesn't work with knobs, it's no way easier to use with my knob-based control surface than the thing that does work with knobs.
And the amount of control I have is perfectly sufficient. Even if I bought into your premise that virtual PTZ offers finer control (I don't), it's not something I need, especially with all of the drawbacks it comes with.
Originally Posted by: spinfold 
and you don't need to use flatten or mix inputs.
At the expense of everything outlined above.
Again, I appreciate your concern, but the months I spent building, workshopping, and troubleshooting the various options over the years (including the one you suggest), as well as the time I've spent developing and mastering my preferred style in connection with focus grouping my audience, and the time I've spent talking to past and future guests to hone in on what causes certain decisions and how I can best emphasize what I need to get the best production possible while still acknowledging that they're doing me a favor with the limited time they have available, most likely outweigh the (I assume) less than an hour you spent between reading my situation and deciding I'm "approaching this the wrong way".
I know it says I joined the forum less than 5 years ago, which I did.
But I've been using vMix for almost a decade and a half and this point. And I've been doing these types of interviews longer than that.
I have a pretty good handle what my average guest can/can't/will/won't do and I have an extremely good handle on what the software can/can't do within the realm of what I need done.
I knew what it could do when I started. I know what it can do now. And every time new functionality is introduced, if it provides a new workflow of doing what I need done, I test it. If interacts with existing functions that I previously tested, but might impact how they perform, I retest them.
My goal, from the very beginning, has always been to make the best production possible within the constraints posed by my circumstances and my guests'.
Which is exactly why I can point to 3 reasons, immediately, that what you believe to be the best choice is worse than my current option. Because I've tried it, more than once, and, despite your claim that I'm "approaching this the wrong way" & that I should be doing it your way, your way does not yield the best production possible within those constraints.
If you have other suggestions, I'm open to listening to them, but I'd recommend keeping in mind that I've been doing the types of interviews I've been doing, within the circumstances they're done in, for longer than you've been thinking about them, so the odds are that anything you can come up with is something I've already tried and rejected.
So maybe try to stick to the "Why don't you..." questions and less of the baseless "You're approaching this the wrong way" nonsense.