[x265] Unclear VUI options

[dave]

On 02/21/2014 02:12 PM, Mario Rohkrämer wrote:
> If the video complies to broadcasting standards like ITU-R BT.601/709, 
> then it should have a limited luminance and chrominance range in YUV 
> color space. Full range video should only exist if it was generated 
> artifically (e.g. by a 3D renderer or heavy filtering).
>
> My remark is rather directed to the meaning of the parameter name, 
> though. A boolean answer is valid for a question like "Does this video 
> have *full* range? Yes/No". But asking "Does this video have (any) 
> *range*?" doesn't make sense; you would rather ask "Which range does 
> this video have? TV/PC".
>
> Video cannot have "either any range or no range". Therefore at least 
> the name "--[no-]range" is wrong. A name like "--[no-]full-range" 
> would at least make some sense, but possibly looks a bit complicated.
>
Understood.  I can setup the tv or pc option.  If I add the auto option 
now it won't be functional yet.

by the way, there are other options where bt709 is possible, can that be 
used to determine range?