Thanks a lot for the patch. Got the H264 encoder to encode the test pattern on Allwinner V3s, with the additional following patches:
https://lkml.org/lkml/2020/11/16/486 "ARM: dts: sun8i: v3s: Add node for system control",
https://lkml.org/lkml/2020/11/16/485 "ARM: dts: sun8i: v3s: Add video engine node",
and the patch in attachment to enable JPEG/H264 encoder capabilities on V3s.
However the lack of RAM on V3s causes the kernel CMA to really struggle so I have only been able to run the encoder at low definitions for now.
0001-media-cedrus-v3s-H264-and-JPEG-and-capabilities.patch
