[Libav-user] change pixel format without scaling data ? // more3

[Roman Ryltsov]

Jim,

> I use this many ways.  For one instance:
> Input is YUV422
> Output Is RGB16

What kind of grayscale alteration do you see? YUV color space has
explicit brightness component, while in RGB it is distributed between
all three components. That is, converting between these you inevitably
apply math to grayscale levels, though you should not get any
significant difference going beyond rounding to nearest integer.

Roman