Resolve IO Encode SDK: 16-bit clrYUVp 420 gives broken image

I'm using the DaVinci Resolve IO Encode SDK (https://resolve.cafe/developers/encodeplugin/).

Requesting 16-bit clrYUVp 4:2:0 (pIOPropColorModel=clrYUVp, pIOPropHSubsampling=2, pIOPropVSubsampling=2, pIOPropBitsPerSample=16) gives a broken image. Requesting 4:2:2 seems fine.

Here's a dump of both buffers of a single image: https://drive.google.com/file/d/1Aq5lvL ... sp=sharing
The dump contains 4 files:
dump420.raw : dump of 16-bit clrYUVp 4:2:0
dump422.raw : dump of 16-bit clrYUVp 4:2:2
dump420_8.raw : data of dump420.raw with each 16-bit value converted to 8-bit (for easier viewing)
dump422_8.raw : data of dump422.raw with each 16-bit value converted to 8-bit (for easier viewing)

Attached is an image using a raw viewer. The 422 image is fine, Y plane first followed by U/V, but 420 is completely broken somehow.

Please advise.

Hi Balázs,
Did you find the source of your problem or how to work around the bug ?
Regards,
Antoine

The problem is with Resolve giving a broken image, I found no solution to fix that from my end. My workaround is that I simply avoid requesting 16-bit YUV 420 from Resolve.

Ouch sorry about that. Are there others pixel formats who appear to be broken according to your experience ?

I haven't encountered others, but I haven't tried them all.
Why do you ask, do you have the same issue? Can you reproduce?

I might test it at some point ! I'm interested in this export SDK too

Did this eventually work for you on the newer version of resolve?

You stated

Planar YUV 4:2:0 should be setup as (pIOPropColorModel=clrYUVp, pIOPropHSubsampling=2, pIOPropVSubsampling=2)

How do you setup YUV 4:2:2 (pIOPropColorModel=clrYUVp, pIOPropHSubsampling=2, pIOPropVSubsampling=? <-- i'm assuming 1?)

Did it work when using 8-bit?

I'm trying to create a new plug for the svt-av1 encoder..

Did this eventually work for you on the newer version of resolve?

No. Resolve 19 seems also broken. Does it work for you? Could you test this please?

How do you setup YUV 4:2:2 (pIOPropColorModel=clrYUVp, pIOPropHSubsampling=2, pIOPropVSubsampling=? <-- i'm assuming 1?)

Yes (pIOPropVSubsampling=1).
As a side note: for 8-bit 4:2:2 you also have the option of clrUYVY.

Did it work when using 8-bit?

Yes.