A: Unofficial, yes (LineageOS 17.1 exists). But you will lose hardware decoding for some codecs. NHG47K has the best video playback support.
If you own a budget Android TV box based on the Rockchip RK3228 or RK3229 chipset—often sold under generic names like "RK322xbox," "X96 Mini," "MXQ Pro 4K," or "VONTAR"—you might be searching for the specific firmware version "71 2 NHG47K." A: Unofficial, yes (LineageOS 17
If your RK322xbox can run Android 9 (TV) or Android 12 (AOSP) via community builds, that is much safer. But some users prefer NHG47K for its stability and lower RAM usage (under 400MB at idle). FAQ – RK322xbox NHG47K Firmware Q: Is this firmware really free? A: Yes. All RK322x firmware is distributed under GPL for kernel sources. Never pay for Android TV box firmware. If you own a budget Android TV box