<html><head></head><body bgcolor="#FFFFFF"><div>What is fast pskip do?</div><div><br></div><div>I have the same situation with very small sub area of the frame is changed from frame to frame.</div><div><br></div><div>Tsahi.<br><br><div style="text-align: left;direction: ltr; "><br></div></div><div><br>ב-7 בנוב 2011, בשעה 05:44, "Jason Garrett-Glaser" <<a href="mailto:jason@x264.com">jason@x264.com</a>> כתב/ה:<br><br></div><div></div><blockquote type="cite"><div><span>On Sun, Nov 6, 2011 at 2:14 PM, Chris Waters <<a href="mailto:watersco@gmail.com">watersco@gmail.com</a>> wrote:</span><br><blockquote type="cite"><span>Hi,</span><br></blockquote><blockquote type="cite"><span>I want to encode a synthetically sequence of images into an H.264 video with</span><br></blockquote><blockquote type="cite"><span>as little CPU as possible. By synthetically generated I mean that my</span><br></blockquote><blockquote type="cite"><span> program is generating the images – so I already know a number of</span><br></blockquote><blockquote type="cite"><span>characteristics of each frame. For example I know which parts of each frame</span><br></blockquote><blockquote type="cite"><span>differ from the previous frame – i.e. the rectangle containing the pixels</span><br></blockquote><blockquote type="cite"><span>that have changed from the previous frame.</span><br></blockquote><blockquote type="cite"><span>I am trying to work out if there is a way to tell x264 that only pixels</span><br></blockquote><blockquote type="cite"><span>within a certain rectangle have changed when encoding each frame. It seems</span><br></blockquote><blockquote type="cite"><span>to me that if I could do this then a lot of computation could be saved</span><br></blockquote><blockquote type="cite"><span>because it wouldn't be necessary to do anything related to motion</span><br></blockquote><blockquote type="cite"><span>estimation</span><br></blockquote><span></span><br><span>x264 already has fast pskip, which already does this (albeit at a small cost).</span><br><span></span><br><span>Jason</span><br><span>_______________________________________________</span><br><span>x264-devel mailing list</span><br><span><a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a></span><br><span><a href="http://mailman.videolan.org/listinfo/x264-devel">http://mailman.videolan.org/listinfo/x264-devel</a></span><br></div></blockquote></body></html>