Question / Help Color matrix metadata issue

[FX8350]

Sorry, this is Google Translate.
There is no problem with x264, but some metadata is displayed as BT.470 when using NVENC.
I don't know what BT.470 is. PAL TV?

NVENC:
View attachment 50532

x264
View attachment 50533

Note:Don't say me "use BT.601" Please.