sorry for the late reply, as i tested some manual ffmpeg transcodes now too ...
and yes, it should be capable of decoding and encoding (which is working in hardware - tested from h264 to hevc)
here are some small samples i made, onedrive
https://1drv.ms/u/s!ApY1s9BRY-iSpxNT...PyOTl?e=NgHm3X
all my tests ended in software decoding with dvb streams ...