Perhaps you have already looked at it and can't but I hope you can....

Right now it is impossible to record NDI (and as a result callers) directly while only getting one file per source. Any time frame rate, resolution, etc changes the file is stopped and a new file begins. Every NDI recorder including vmix I have found works like this. It's just how NDI works.

The work around is to assign each input you want to Iso to an output and use audio buses to ISO the audio. Recording the output gives single file per output, however with vmix we are limited to 4 outputs. To record program and 8 callers it takes 3 licensed vmix machines...

I propose you take the coding you already have in vmix outputs and multicorder and create a new tool/piece of software. Have 9-12 "recording channels" that can be assigned any NDI source. Each channel would process the same way as a vmix output does before the multicorder. The recording would be the same as your multi-corder. Only other thing I would ask is the ability to name each channel for the purposes of file name so that I don't need to rename every file when doing multiple recordings/takes.

Even if this is a separately licensed software, I'll gladly pay for it.

Thanks. I'll take a look at it.