You are requesting source media info. Not sure why that would matter as much as destination but OK. .mp4, MTS and stills/hirez photos

Render to track is useful to generate a smooth preview of a complicated part of your timeline. To get rid of some overlay tracks, I would use nesting.

KwikPreview! 😉

@Musicvid Why are you asking for mediainfo on media that doesn't exist?

@JHendrix Your question has a lot of answers, all depending on your specific needs.

fwiw, my preference is magicyuv which is lossless, inexpensive, fast and the file sizes are, imo, reasonable. I use it very regularly to pre-render tracks with and without alpha that I can consider "done"

@michael-harrison

He says his media is this.

You are requesting source media info. Not sure why that would matter as much as destination but OK. .mp4, MTS and stills/hirez photos

@JHendrix

You asked "What is best format for uncompressed / pass-through with no audio and reasonable file size?"

To me, the first thing I would want to know is my highest common source, since different media will optimize at very different "reasonable" file sizes; depending, of course, on what can be smart-rendered or rendered losslessly, with or without compression. But if it doesn't matter to you, don't bother.

@Musicvid You didn't say any of that in your reply. We can't hear you through the intertubes, you have to actually write your thoughts out.

And best of the holidays to you too, Michael!

I thought @JHendrix just wanted to get rid of some Overlay tracks (probably with transparency). Using Nesting instead of "rendering to new track" keeps original Overlay tracks editable (and their transparency), is lossless, doesn't require almost no storage space and extra rendering time.

Yes, that would do it, without playing 20 Questions.