How to do AMD hardware decoding for MJPG live camera stream?

[rajhlinux]

Hello,

I am trying to do transcoding for a MJPG live camera stream.

I have an AMD Radeon WX 2100 GPUs and also an AMD Radeon RX 580

How can I use these GPUs to do MJPG decoding and then "h264_amf" encoding using FFMPEG?

I have about 4 MJPG streams that are coming from 4 USB 3.0 capture cards that are connected to the PC. Would like to use FFMPEG to transcode all 4 streams.

I do not want to utilize the CPU since I have an old AMD FX-8350 CPU. OS: Arch Linux.

Thanks.