model name : ARMv7 Processor rev 3 (v7l)
Is this due to a lack of interest? The Raspberry Pi 4 supports hardware decode of H.265 (up to 4K 60 FPS) and H.264 (up to 1080p 60 FPS); and hardware encode of H.264 (up to 1080p 30 FPS). And FFMPEG has direct support for hardware encode on the Pi. My feeling is that it likely could be implemented, given sufficient interest.
A feature request exists for this:
