[x264-devel] Efficiently encoding synthetic data

[Jason Garrett-Glaser]

On Sun, Nov 6, 2011 at 2:14 PM, Chris Waters <watersco at gmail.com> wrote:
> Hi,
> I want to encode a synthetically sequence of images into an H.264 video with
> as little CPU as possible. By synthetically generated I mean that my
>  program is generating the images – so I already know a number of
> characteristics of each frame. For example I know which parts of each frame
> differ from the previous frame – i.e. the rectangle containing the pixels
> that have changed from the previous frame.
> I am trying to work out if there is a way to tell x264 that only pixels
> within a certain rectangle have changed when encoding each frame. It seems
> to me that if I could do this then a lot of computation could be saved
> because it wouldn't be necessary to do anything related to motion
> estimation

x264 already has fast pskip, which already does this (albeit at a small cost).

Jason