Attempting hardware acceleration, ffmpeg -init_hw_device says "No device found"

[TheDreadPirate]

Jellyfin's documentation says you should be using VAAPI, but the documentation implies that it only works for Vega and newer? Otherwise use AMD AMF, but then you are dependent on the built in hardware decode/encode engine. UVD 4.0, the engine in the 270, only supports decoding H264 (assuming 8-bit). No H264 encoding support, meaning no accelerated transcoding. And no HEVC acceleration at all.