[vlc-devel] Minor wiki updates

Juha Jeronen juha.jeronen at jyu.fi
Tue Jan 31 11:08:59 CET 2012

On 01/27/2012 11:47 PM, Rémi Denis-Courmont wrote:
> Le vendredi 27 janvier 2012 22:51:04 Juha Jeronen, vous avez écrit :
>> (For example, what to make of YV12? As in, why would anyone want the U/V
>> planes in reverse order?
> The order of U and V is rather arbitrary.

Mathematically speaking, true.

>  For planar format it does not matter 
> much to software. Each plane has its own pointer anyway.


> So optimizing for hardware might actually make sense. Also YV12 is 
> unambiguous. It means Y V U plane order in contiguous memory or Y V U plane 
> order in the VLC picture_t table depending on the situation.
> On the other hand, YVYU and VYUY are not very explicit names. I have not seen 
> them used in real life. Most webcams and graphic adapters support YUY2 and 
> UYVY instead.

I see.


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