Not 81 bad frames, but pages?

So far I use ProRes in Vegas, watching at the media, seems good to me...

And how do they do the QC checking on the ProRes media ?

I did some prores render quality tests and it came up clean for short clips. Will try some in the hour+ range. Don't know if this is applicable but I hear that cameras often drop frames when using media that's not up to the sustained high bit rates of Prores formats like hq, xq, and raw. To media like Samsung T5 ssds. Generally switching to m.2 sata ssds or cfast media clears that up.

@adis-a3097 Yes - 81 PAGES. It looks like it isn't a ProRes issue. Somehow, a large portion of my timeline has unquantized cuts in it (and, no, quantize frames is NOT toggled off). I even have Vegas text generated media clips that are unquantized. Go figure.

@set They don't test ProRes specifically - that's just the codec I had to use. The QC breaks down everything, including screen shots of the bad frames (so if you scroll the PDF fast enough, you can watch the silent version of my show...)

Frame rate mismatch somewhere in the pipeline?

Yes, if there is one single event in your project which framerate differs from the project frame rate and you then trim this one event at its unquantized edge using rippling, it will cause all events after to get out of quantize.

I think that's what happened. Must be. People look at me like I have two heads, but I NEVER touch the quantize toggle.

My ProResXQ test on a large HD project (approx 3 hours) came up clean here. Very high scores comparing to alternate render formats. VMAF = 99.978953 with amd 60 mbps vbr hq. Didn't see any evidence of dropped frames... though I saw a number of periodic dips of about 50% in equality.

Vegas doesn't seem to have a lossless preset (wouldn't it be nice). So as a basis of comparison I tried a number of Intel and Nvidia formats that always score higher and smaller from lossless than ProRes. The renders were relatively quick, but ffmetrics took all night. Because of the enormous frame count in the ProRes render.

"Vegas doesn't seem to have a lossless preset (wouldn't it be nice)."

I think there is no lossless standard available for Apple ProRes.

That's true. But there are several other lossless standards. I like HEVC lossless which can be decoded in hardware and Vegas can read on the timeline but not render itself. There's also others like DNxHD and FFV1. As well as a very close-to-lossless AVC which might also be decoded in hardware. Having any of those would be great for confirming the quality of renders to other formats. Like ProRes which I just did. I like HEVC lossless best because it's the smallest of the bunch.

@Jessariah67 I added the VP Prores (introduced in previous build, 482) codec to my Render Quality table, fhd. Can be accessed via my signature, plus link to screenshots.

Just to be clear, these are not technically "lossless". They may be visually lossless, but anytime you have compression in video, it is information lost.

All but AVC are technically lossless. I've confirmed that myself doing comparison measurements drawn from zRAW camera footage I shot myself. At some point if Vegas adds the ability to read ProResRAW directly, I'll probably pick a Ninja recorder for my camera and add that in as another reference.

AVC can get so close to lossless, that's a pretty good substitute since it's so easy to decode. Full set of quality measurements I've run on VP16, 17, 18 and selected others, as of this morning, are online here.

@JN- wrote

@Jessariah67 I added the VP Prores (introduced in previous build, 482) codec to my Render Quality table, fhd. Can be accessed via my signature, plus link to screenshots.

I get no where near scores as high as you do for any non-raw variant of ProRes when referencing them to lossless drawn directly from raw out of my camera. I wonder if you might be using a reference transcoded from less than pure camera footage which might be biasing things. The reference is so crucial to this kind of analysis which is why I think it would be so nice if Vegas could render one directly for any given project. My charts are in my post above as well as my signature. As I've only been at this a relatively short while, I welcome your input.