[x264-devel] Adding borders

[Phil Rutschman]

What about adding additional slices above and below, taking a 1-slice
sequence to a 3-slice?

 

Phil Rutschman <philr at modsystems.com>

 

From: x264-devel-bounces at videolan.org
[mailto:x264-devel-bounces at videolan.org] On Behalf Of Liu Peng
Sent: Thursday, October 16, 2008 9:59 PM
To: Mailing list for x264 developers
Subject: Re: [x264-devel] Adding borders

 

In my understanding, adding macroblocks is possible, but adding
macroblocks means we have update slice configuration, and QP values of
original macroblocks.

In addition, the entropy coding has to be changed, you know, the entropy
coding is "Context Adaptive" :-)

/Peng

On Fri, Oct 17, 2008 at 4:05 AM, Loren Merritt <lorenm at u.washington.edu>
wrote:

On Wed, 15 Oct 2008, Leon Woestenberg wrote:

> The question was most probably about adding macroblocks to the
> existing stream without affecting (re-encoding) the existing stream.

Not possible. If you insert or modify any pixels, you have to requantize
everything. A sufficiently smart transcoder could save on speed, but
it's
still lossy.

--Loren Merritt

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