[vlc-devel] [PATCH 2/2] add V4L2 video_output module

Rémi Denis-Courmont remi at remlab.net
Sat Jan 14 19:31:46 CET 2012

Le samedi 14 janvier 2012 15:43:16 Francois Cartegnie, vous avez écrit :
> Le 14/01/2012 09:42, Rémi Denis-Courmont a écrit :
> > It is dubious that you would need to copy pictures.
> writev() doesn't help here.

That is quite bold a statement.

> I have the same result as using many writes for one picture.

The point is performance, not result. A single writev() system call is faster 
than many write() calls, and also faster than many memory copies and one 
write() call.

Rémi Denis-Courmont

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