<div dir="ltr">In my understanding, adding macroblocks is possible, but adding macroblocks means we have update slice configuration, and QP values of original macroblocks.<br><br>In addition, the entropy coding has to be changed, you know, the entropy coding is "Context Adaptive" :-)<br>
<br>/Peng<br><br><div class="gmail_quote">On Fri, Oct 17, 2008 at 4:05 AM, Loren Merritt <span dir="ltr"><<a href="mailto:lorenm@u.washington.edu" target="_blank">lorenm@u.washington.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>On Wed, 15 Oct 2008, Leon Woestenberg wrote:<br>
<br>
> The question was most probably about adding macroblocks to the<br>
> existing stream without affecting (re-encoding) the existing stream.<br>
<br>
</div>Not possible. If you insert or modify any pixels, you have to requantize<br>
everything. A sufficiently smart transcoder could save on speed, but it's<br>
still lossy.<br>
<font color="#888888"><br>
--Loren Merritt<br>
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