diff options
| author | Timothy Gu <timothygu99@gmail.com> | 2016-01-24 20:49:12 +0300 |
|---|---|---|
| committer | Timothy Gu <timothygu99@gmail.com> | 2016-01-30 04:14:37 +0300 |
| commit | 9ba54c1b82a81581e5283da75c153a76f04324c0 (patch) | |
| tree | 75d0adad5a7f644ca3e3138032ea09586ad5121c /doc/general.texi | |
| parent | 5893e8753702765ec4c2f775d7beef6afe7265e7 (diff) | |
avcodec: Remove libaacplus
TODO: bump minor
It's inferior in quality to fdk-aac and has an arguably more problematic
license.
As early as 2012, a HydrogenAudio user reported:
> It has however one huge advantage: much better quality at low bitrates than
> faac and libaacplus.
(https://hydrogenaud.io/index.php?PHPSESSID=ckiq394pdglka0kj2fin6ij8t7&topic=95989.msg804633#msg804633)
I myself have made a few spectrograms for a comparison of the two
encoders as well. The FDK output is consistently better than the
libaacplus one, in all bitrates I tested.
libaacplus license is 3GPP + LGPLv2. 3GPP copyright notice is completely
proprietory, as follows:
> No part may be reproduced except as authorized by written permission.
>
> The copyright and the foregoing restriction extend to reproduction in
> all media.
>
> © 2008, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC).
>
> All rights reserved.
(The latest 26410-d00 zip from 3GPP has the same notice, but the copyright
year is changed to 2015)
The copyright part of the FDK AAC license (section 2) is a copyleft
license that permits redistribution under certain conditions (and
therefore the LGPL + libfdk-aac combination is not prohibited by
configure):
> Redistribution and use in source and binary forms, with or without
> modification, are permitted without payment of copyright license fees
> provided that you satisfy the following conditions:
>
> You must retain the complete text of this software license in
> redistributions of the FDK AAC Codec or your modifications thereto in
> source code form.
>
> You must retain the complete text of this software license in the
> documentation and/or other materials provided with redistributions of
> the FDK AAC Codec or your modifications thereto in binary form.
>
> You must make available free of charge copies of the complete source
> code of the FDK AAC Codec and your modifications thereto to recipients
> of copies in binary form.
>
> The name of Fraunhofer may not be used to endorse or promote products
> derived from this library without prior written permission.
>
> You may not charge copyright license fees for anyone to use, copy or
> distribute the FDK AAC Codec software or your modifications thereto.
>
> Your modified versions of the FDK AAC Codec must carry prominent
> notices stating that you changed the software and the date of any
> change. For modified versions of the FDK AAC Codec, the term
> "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the
> term "Third-Party Modified Version of the Fraunhofer FDK AAC Codec
> Library for Android."
Diffstat (limited to 'doc/general.texi')
| -rw-r--r-- | doc/general.texi | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/general.texi b/doc/general.texi index 6f40671e9d..d66e60a9c5 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -881,10 +881,10 @@ following image formats are supported: @item Name @tab Encoding @tab Decoding @tab Comments @item 8SVX exponential @tab @tab X @item 8SVX fibonacci @tab @tab X -@item AAC+ @tab E @tab IX - @tab encoding supported through external library libaacplus @item AAC @tab E @tab X - @tab encoding supported through external library libfaac and libvo-aacenc + @tab encoding supported through external library libfaac, libfdk-aac and libvo-aacenc +@item AAC+ @tab E @tab IX + @tab encoding supported through external library libfdk-aac @item AC-3 @tab IX @tab IX @item ADPCM 4X Movie @tab @tab X @item APDCM Yamaha AICA @tab @tab X |