@MUGENG so thats actually expected behavior in some circumstances as none of the hw devices support overlaying on top of 10 bit data so we have to use sw. That being said:
A) I have modified the behavior so this only applies when transcoding to a 10 bit format instead of all HEVC transcodes
B) You will still be able to take advantage of HW encoding, decoding, scaling, tonemapping ect, only the overlay will be sw based
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