I use a DIY Raspberri Pi solution using boards from IAN Canada.
It uses a 5V Akku to power the raspberry and 3.3V Ultracapacitors to power a reclocking board and a HDMI transport board.(I2S connection) For the setup refer to page 9 of [this document](https://github.com/iancanada/DocumentDownload/blob/master/UltraCapacitorPowerSupply/PurePi/PurePiManual.pdf) I successfully connected it to my Denafrips Venus II DAC and now have a very well sounding streaming soliution which cost me approx. USD 500.
There are even more advanced configurations possible
Customer support with IanCanada is prime.
Martin