Resolution changing render colours

I am working with old DV camcorder footage, which is 720 x 576 PAL. If I render them at this resolution and re-import them to the same timeline the colour has shifted, so that the reds are much more orange.

If set the project to 1920 X 1080 and use the same clip rendered to 1920 x 1080, the colours in the re-imported clip are identical to the original (with bonus black bars).

I would not expect the resolution to affect the colour. Am I doing something wrong?

It's likely something else that is causing that, not the resolution directly.

What is the purpose of the exports?

I was planning to render intermediate clips to speed things up after de-noising with Neat Video, which is why I reimported them and saw the difference.

Ultimately they need to be exported in a format that is sensible for home use.

For some reason exporting as AVI at the same settings does not cause the problem (just bigger files) but QT and MP4 do.

Having experimented more I have discovered that I get the same colour change if I start with an HD MP4 clip from a modern camera and export it with the PAL resolution, but not if I export it at the original HD resolution.


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OK.

So I think my first choice here would be to work with the original media, then apply Neat Video as the very last step before final export.

That a possibility?

Unfortunately that wouldn't work because the final export would still have the colour change.

I did a lot more digging and discovered that the problem had already been highlighted in this post:

viewtopic.php?f=21&t=130628&p=708622&hilit=distortion#p708622

I tried this at 578 and 574 and got the same result. With the resolution 576 or below the colour changes, above 576 it it fine.

There are some old posts about importing old DV AVI files being a problem but nothing about the colour change, so I though it must be a recent issue. I uninstalled DR 17 and installed DR 16. Problem solved, it works exactly as it should, so must be an issue with DR 17. The database is obviously not backwards compatible, which means that I can't access anything I did in 17 but at least I have solved the problem and it turns out that I wasn't doing something wrong, which is a bonus!

Does anyone have any other ideas about this? It would be good to be able to go back to DR17 and access the other projects.

I am assuming that it is a bug as DR16 doesn't behave the same?

You’ve found a bug, Why not just upscale the video as a workaround?