On Mon, Feb 16, 2015 at 07:49:50PM +0100, Nicolas George wrote: > L'octidi 28 pluviôse, an CCXXIII, Clement Boesch a écrit : > > A lot of users will want to know how to avoid the transcode. > > True. New patch attached. > > Regards, > > -- > Nicolas George
> faq.texi | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
> 5193c6d2bce98c5addcc246e311c29e7af2d837d
> 0001-doc-faq-explain-DAR-SAR-preserving.patch
> From db3ed4560061be5cbfad5547ef7a2d9af7ccb874 Mon Sep 17 00:00:00 2001
> From: Nicolas George <geo...@nsup.org>
> Date: Mon, 9 Feb 2015 16:17:22 +0100
> Subject: [PATCH] doc/faq: explain DAR/SAR preserving.
>
> Signed-off-by: Nicolas George <geo...@nsup.org>
> ---
> doc/faq.texi | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/doc/faq.texi b/doc/faq.texi
> index 494da86..c3db720 100644
> --- a/doc/faq.texi
> +++ b/doc/faq.texi
> @@ -467,6 +467,40 @@ point acceptable for your tastes. The most common
> options to do that are
> @option{-qscale} and @option{-qmax}, but you should peruse the documentation
> of the encoder you chose.
>
> +@section I have a stretched video, why does scaling does not fix it?
> +
> +A lot of video codecs and formats can store the @emph{aspect ratio} of the
> +video: this is the ratio between the width and the height of either the full
> +image (DAR, display aspect ratio) or individual pixels (SAR, sample aspect
> +ratio). For example, EGA screens at resolution 640×350 had 4:3 DAR and 35:48
this x looks strange, and we had problems with these in the past
and removed them: 1afbb4c226203c1a0853c9ad469cd9ef337080e4
patch LGTM otherwise
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
It is dangerous to be right in matters on which the established authorities
are wrong. -- Voltaire
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