[FFmpeg-devel] [PATCH] doc/encoder: document the libfdk-aac wrapper

Stefano Sabatini stefasab at gmail.com
Thu Oct 31 09:28:02 CET 2013


On date Wednesday 2013-10-30 12:49:36 +0100, Clément Bœsch encoded:
[...]
> > From 2742c79537fc1f3a09ce5c3b6769d58189625ca8 Mon Sep 17 00:00:00 2001
> > From: Stefano Sabatini <stefasab at gmail.com>
> > Date: Tue, 29 Oct 2013 21:50:09 +0100
> > Subject: [PATCH] doc/encoders: document the libfdk-aac wrapper
> > 
> > Partially based on the https://trac.ffmpeg.org/wiki/AACEncodingGuide
> > guide.
> > ---
> >  doc/encoders.texi | 159 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 157 insertions(+), 2 deletions(-)
> > 
> > diff --git a/doc/encoders.texi b/doc/encoders.texi
> > index 67f2a39..879421d 100644
> > --- a/doc/encoders.texi
> > +++ b/doc/encoders.texi
[...]
> What about -global_quality and -q:a?

Well the way it is handled is bit messy. The q:a is converted to
lambda units through QP2LAMBDA, and then interpreted as a vbr value.

So the -q:a value does not correspond to a VBR mode as probably
expected. I'm keeping documentation for global_quality, as in the
first patch.

[...]

I'll push the patch soon if I see no more comments.
-- 
FFmpeg = Faithful and Free Mega Philosofic Eretic Gadget
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