My kernel is 5.4.24 (from SOMLabs, NXP partner) and I still cannot find those fields (nFullRange, nColorConversionType, nStreamSliceCount) in any documentation.
However when i migrated from 4.14.98 (8mminilpd4-evk) to the 5.4.24 (VisionSOM-8Mmini) with same settings of VPU wrapper (recompiled with proper SDK) the output from video encoder seems broken. It was working perfectly on old kernel. I still can grab video but it seems like there are some changes with VPU wrapper or h264 encoder.
You can find all the VPU parameter in the iMX_VPU application Programing document in your yocto documents folder. You can download the documents from: