There are different android tv setop boxes available which provide an HDMI Input for PVR purposes. With little modifcation these boxes can not only be used to capture HDMI signals to an USB stick but also pipe the output into an e.g. an ffmpeg process. The HDMI signal feed into the input is also available on an HDMI output with nearly no latency. As the output is done by the android system it is scalled to the desired resolution and also 'seemless'. This makes the boxes also a very cheap scaller / semmeless adapter.

We are currently aware of to different Chipsets / Boxes known to work. Each box needs an streaming app which is linked on the specific page

• MSTAR MSO9180D1R
  • hardware:tronsmartpavom9 (seems to be out of production, sometimes devices are still availble e.g. at aliexpress)
• Realtek
  • hardwaer:zido