How to work with SD yuv video with rec.601 colormatrix in DaVinci Resolve 15?

[mandarinka]

Hello, I'm trying to use DaVinci Resolve 15 for color adjustment of some SD clips. This is my first time using the software so I don't know its inner workings.
My input are 712x480 yv12 files, I converted them to yuy2 in avisynth and then saved them as 10bit raw yuv, v210 in mov (using virtualdub2) to import them into Resolve.

The problem is: the sources use rec601/bt601 colormatrix. I see no option to specify this and the project timeline is set to work in rec709 in the program, with no option to use bt601. BT709 is then also automatically used when exporting (I think?).

Question: Does Resolve actually guess that the input is rec601 and converts when I import a 712x480 clip (I manually set this exact resolution as my custom format in the clip and timeline properties)? Does it have this resolution-based colormatrix-selection logic?
Or does it just treat all yuv (V210 in mov in my case) as bt709 automatically? Do I actually have to convert my input video to bt709 to get proper color in Resolve then?

[mbcd]

Found this here, should nearly match what you need .. not exactly ...

https://www.youtube.com/watch?v=DGY14ygjpLU

[mandarinka]

Thanks for that video, I think I already looked at that color managed mode and the input/output colorspace settings.
The problem hower is, there is no bt.601/rec.601 or similar option to set. There are lots of professional colorspaces/formats but nothing like the simple "SD colormatrix" option.
Am I missing something and is it there, hiding under some convoluted name?

Anybody knows?

[poisondeathray]

Just run some tests, like known colors, or color bars.

It looks like it works ok by using default settings. For preview and exported output, regardless of flags

I purposely did wrong metadata test, colors were still correct (as 601) . Resolve 15
https://ffmpeg.org/ffmpeg-bitstream-filters.html#prores_005fmetadata

[mandarinka]

Oh, that's nice to hear, thanks.