IPB

Welcome Guest ( Log In | Register )

Open Source Fraunhofer AAC Encoder (fdk-aac)
D404
post Jul 11 2012, 17:02
Post #1





Group: Members
Posts: 7
Joined: 30-July 08
Member No.: 56482



Android 4.1 has included an AAC encoding library by Fraunhofer, and Libav/FFmpeg support for this library is in the works (that is, in a day or two, it will be official.)

From the release announcement:
QUOTE
As part of the Android Jelly Bean source code released recently, a new AAC
library was released as well, developed by Fraunhofer:
https://android.googlesource.com/platform/external/aac

To ease using this library on platforms other than Android, I have added
an autotools based build system and done a minor portability fix, and
released this code as fdk-aac 0.1.0 today.

This project is hosted at sourceforge, under the opencore-amr project,
acting as an umbrella project for these codecs that are repackaged from
Android as standalone libraries, just as opencore-amr, vo-amrwbenc and
vo-aacenc before this one.

The release file is available at
http://sourceforge.net/projects/opencore-amr/files/fdk-aac/
and the code is available in git at
git://opencore-amr.git.sourceforge.net/gitroot/opencore-amr/fdk-aac.

This library is licensed under a custom copyleft style license:
http://opencore-amr.git.sourceforge.net/gi...a=blob;f=NOTICE

I in general intend to limit this project to minor tweaks and portability
fixes - for anything larger than that, I'd prefer if it first is
contributed upstream, to keep the difference between the upstream code and
this library as small as possible.


Edit: Obvious patent violation removed.

It can be used as such:

Bitrate Mode
CODE
avconv -i <input> -c:a libfdk_aac -b:a <bitrate> -afterburner 1 <output>


VBR Mode
CODE
aconv -i <input> -c:a libfdk_aac -flags +qscale -global_quality [1-5] -afterburner 1 <output>


VBR modes 1-5 correspond to roughly:
  1. about 32 kbps/channel
  2. about 40 kbps/channel
  3. about 48-56 kbps/channel
  4. about 64 kbps/channel
  5. about 80-96 kbps/channel

-afterburner 1 enabkes "improved quality" mode.

Cheers.

Edit: This should be moved to the Tech forum.

This post has been edited by Garf: Jul 11 2012, 19:30
Go to the top of the page
+Quote Post
 
Start new topic
Replies
06_taro
post Jul 11 2012, 22:33
Post #2





Group: Members
Posts: 12
Joined: 22-September 10
Member No.: 84054



libfdk-aac also has an aac decoder, which can decode AAC-LD/AAC-ELD, though limited to 16-bit integer output.
Go to the top of the page
+Quote Post
saratoga
post Jul 12 2012, 00:04
Post #3





Group: Members
Posts: 5147
Joined: 2-September 02
Member No.: 3264



QUOTE (06_taro @ Jul 11 2012, 17:33) *
libfdk-aac also has an aac decoder, which can decode AAC-LD/AAC-ELD, though limited to 16-bit integer output.


Not much in the way of ARM assembly code though, so probably no faster then existing arm decoders.
Go to the top of the page
+Quote Post

Posts in this topic
- D404   Open Source Fraunhofer AAC Encoder (fdk-aac)   Jul 11 2012, 17:02
- - Garf   Heh, interesting. It was pointed out that the prev...   Jul 11 2012, 19:02
- - IgorC   I wonder if it's the same or similar encoder a...   Jul 11 2012, 19:14
|- - Brand   QUOTE (IgorC @ Jul 11 2012, 20:14) I wond...   Jul 11 2012, 20:31
- - LithosZA   QUOTE I wonder if it's the same or similar enc...   Jul 11 2012, 19:21
|- - Garf   QUOTE (LithosZA @ Jul 11 2012, 20:21) QUO...   Jul 11 2012, 19:23
- - IgorC   Can anyone run this encoder in high quality mode (...   Jul 11 2012, 19:23
- - IgorC   Winamp FhG encoder: VBR 4 130 kbps stereo. This n...   Jul 11 2012, 20:37
- - punkrockdude   Interesting! I look forward to try it.   Jul 11 2012, 20:49
- - Brand   QUOTE (IgorC @ Jul 11 2012, 21:37) Winamp...   Jul 11 2012, 20:52
- - 06_taro   libfdk-aac also has an aac decoder, which can deco...   Jul 11 2012, 22:33
|- - saratoga   QUOTE (06_taro @ Jul 11 2012, 17:33) libf...   Jul 12 2012, 00:04
- - IgorC   as well as ELD/LD-AAC encoder.   Jul 11 2012, 22:38
- - hlloyge   Is this available on windows?   Jul 12 2012, 09:37
|- - D404   QUOTE (hlloyge @ Jul 12 2012, 04:37) Is t...   Jul 12 2012, 16:01
|- - Garf   QUOTE (D404 @ Jul 12 2012, 17:01) even th...   Jul 12 2012, 16:40
|- - benski   QUOTE (D404 @ Jul 12 2012, 11:01) QUOTE (...   Jul 12 2012, 20:31
|- - saratoga   QUOTE (benski @ Jul 12 2012, 15:31) I am ...   Jul 12 2012, 21:01
- - 2012   It looks like low pass decisions are broken in CBR...   Jul 12 2012, 17:45
|- - D404   QUOTE (2012 @ Jul 12 2012, 12:45) It look...   Jul 12 2012, 20:22
- - Garf   The extra statements in the license are there beca...   Jul 12 2012, 21:48
- - hlloyge   How do I fit it into foobar2000 for encoding?   Jul 13 2012, 17:29
|- - Canar   QUOTE (hlloyge @ Jul 13 2012, 09:29) How ...   Jul 13 2012, 18:42
- - skamp   I'd settle for instructions on how to compile ...   Jul 13 2012, 19:55
|- - Garf   QUOTE (skamp @ Jul 13 2012, 20:55) I...   Jul 13 2012, 20:15
|- - skamp   QUOTE (skamp @ Jul 13 2012, 20:55) I...   Jul 13 2012, 21:33
|- - 2012   QUOTE (skamp @ Jul 13 2012, 22:33) QUOTE ...   Jul 13 2012, 21:50
- - lvqcl   I downloaded avconv and latest Winamp and encoded ...   Jul 13 2012, 20:38
|- - D404   QUOTE (lvqcl @ Jul 13 2012, 15:38) I down...   Jul 13 2012, 21:27
|- - 2012   QUOTE (lvqcl @ Jul 13 2012, 21:38) I down...   Jul 13 2012, 21:46
- - lvqcl   Ok then. Winamp encoder: 37; 64; 103; 142; 215; 26...   Jul 13 2012, 21:59
- - IgorC   lvqcl, Can You post some frequency graphs of both...   Jul 13 2012, 22:09
- - lvqcl   It turns that avconv adds 2048 null samples to the...   Jul 13 2012, 22:47
|- - kode54   QUOTE (lvqcl @ Jul 13 2012, 14:47) It tur...   Jul 14 2012, 01:58
- - lvqcl   Spectrograms for VBR modes in avconv: 37 kbps, HE...   Jul 13 2012, 22:48
- - Brazil2   QUOTE (D404 @ Jul 11 2012, 18:02) VBR Mod...   Jul 14 2012, 10:29
- - IgorC   lvqcl Thank You. So it's not extacly the sam...   Jul 15 2012, 17:39
- - jossilint   Hello, do anyone knows where to get ffmpeg.exe x64...   Aug 2 2012, 12:26
- - smok3   playing around, testing with new ffmpeg (from git)...   Aug 7 2012, 00:32
- - qbast   It is also quite buggy: I found 4 different places...   Aug 8 2012, 13:52
|- - D404   QUOTE (qbast @ Aug 8 2012, 08:52) It is a...   Aug 8 2012, 16:56
|- - qbast   QUOTE (D404 @ Aug 8 2012, 17:56) QUOTE (q...   Aug 9 2012, 17:01
|- - D404   QUOTE (qbast @ Aug 9 2012, 12:01) I uploa...   Aug 10 2012, 21:09
|- - qbast   QUOTE (D404 @ Aug 10 2012, 22:09) QUOTE (...   Aug 13 2012, 19:11
- - smok3   is there a "compile this git for dummies...   Aug 13 2012, 11:21
|- - 2012   QUOTE (smok3 @ Aug 13 2012, 11:21) neverm...   Aug 13 2012, 13:31
- - pps83   Hello HA, I'm a pro developer and I've wo...   Aug 26 2012, 20:21
|- - db1989   QUOTE (pps83 @ Aug 26 2012, 20:21) Overal...   Aug 26 2012, 20:46
|- - pps83   QUOTE (db1989 @ Aug 26 2012, 20:46) QUOTE...   Aug 27 2012, 00:18
|- - Garf   QUOTE (pps83 @ Aug 27 2012, 01:18) The th...   Aug 27 2012, 12:39
- - m45t3r   QUOTE (db1989 @ Aug 26 2012, 16:46) QUOTE...   Aug 26 2012, 23:48
|- - Garf   QUOTE (m45t3r @ Aug 27 2012, 00:48) This ...   Aug 27 2012, 12:43
- - pps83   QUOTE (m45t3r @ Aug 26 2012, 23:48) This ...   Aug 27 2012, 00:27
- - Garf   QUOTE Overall, all pv or vo codecs that google bou...   Aug 27 2012, 12:49
|- - westgroveg   QUOTE (Garf @ Aug 28 2012, 00:49) QUOTE M...   Aug 27 2012, 13:15
|- - Garf   QUOTE (westgroveg @ Aug 27 2012, 14:15) T...   Aug 30 2012, 07:14
- - ShotCaller   Can anyone provide a link to instructions for comp...   Aug 28 2012, 06:21
|- - Brazil2   QUOTE (ShotCaller @ Aug 28 2012, 07:21) C...   Aug 28 2012, 11:05
- - Tiger Uppercut   QUOTE (ShotCaller @ Aug 27 2012, 20:21) C...   Aug 30 2012, 02:12
- - darkbyte   I've spent a hour trying to compile this with ...   Aug 31 2012, 12:16
- - gottogo99   So, this encoder is in the new ffmpeg 1.0. Anyone...   Oct 9 2012, 00:57
- - jossilint   I would like to know too is there someone tested f...   Dec 15 2012, 21:35
|- - eahm   QUOTE (jossilint @ Dec 15 2012, 13:35) I ...   Dec 15 2012, 23:08
|- - IgorC   QUOTE (jossilint @ Dec 15 2012, 17:35) .....   Dec 15 2012, 23:30
|- - eahm   QUOTE (IgorC @ Dec 15 2012, 15:30) QUOTE ...   Dec 15 2012, 23:38
- - kode54   Too bad ffmpeg hasn't sorted gapless encoding ...   Dec 16 2012, 08:42
- - jossilint   What about quality of FDK compared to closed? is i...   Dec 16 2012, 15:08
|- - Garf   QUOTE (jossilint @ Dec 16 2012, 15:08) Wh...   Dec 17 2012, 12:15
- - nu774   Out of curiosity, I tested this codec with various...   Dec 21 2012, 07:15
- - sluggy   https://github.com/nu774/fdkaac Has anyone tried ...   Jan 5 2013, 23:18
|- - bat_guano   QUOTE (sluggy @ Jan 5 2013, 23:18) Has an...   Jan 7 2013, 04:58
|- - Takla   QUOTE (sluggy @ Jan 5 2013, 22:18) https:...   Mar 19 2013, 00:48
- - eahm   Thanks nu774, the compiler runs perfectly. Now I h...   Mar 1 2013, 04:21
|- - nu774   fdkaac requires -o before %d (same as qaac).   Mar 1 2013, 05:40
- - eahm   Of course ... Thanks.   Mar 1 2013, 06:12
- - hellosky   Does anyone knows how to build the fdk acc as a sh...   Mar 1 2013, 11:16
- - sluggy   https://sites.google.com/site/qaacpage/news...scri...   Mar 1 2013, 12:05
- - kode54   @nu774: Very nice! Now, if anyone finds any sa...   Mar 1 2013, 16:19
- - LithosZA   Are there any freely available decoders than can d...   Mar 2 2013, 11:45
|- - bat_guano   QUOTE (LithosZA @ Mar 2 2013, 12:45) Are ...   Mar 3 2013, 15:05
||- - nu774   I don't feel like writing decoder frontend onl...   Mar 3 2013, 15:47
|- - bat_guano   QUOTE (LithosZA @ Mar 2 2013, 11:45) Are ...   Oct 20 2013, 01:28
- - db1989   Split: Copyright vs. patents, source code vs. comp...   Mar 2 2013, 17:51
- - kareha   Just wondering if there's any need to use this...   Mar 2 2013, 20:58
- - [JAZ]   @kareha: That rather depends if you consider ...   Mar 3 2013, 11:36
- - LithosZA   QUOTE Do you really need it? Nope I just wanted t...   Mar 3 2013, 16:08
|- - nu774   QUOTE (LithosZA @ Mar 4 2013, 00:08) QUOT...   Mar 3 2013, 16:21
- - kode54   I ran these samples by Case, with various encoding...   Mar 15 2013, 00:51
|- - nu774   QUOTE (kode54 @ Mar 15 2013, 08:51) I ran...   Mar 15 2013, 02:44
- - Takla   QUOTE (D404 @ Jul 11 2012, 16:02) It can ...   Mar 20 2013, 00:49
- - sluggy   Yes i thought the vbr modes were a bit strange too...   Mar 22 2013, 14:41
|- - Takla   QUOTE (sluggy @ Mar 22 2013, 13:41) ... w...   Mar 22 2013, 19:43
|- - sluggy   QUOTE (Takla @ Mar 22 2013, 18:43) QUOTE ...   Mar 22 2013, 19:49
|- - Takla   Thanks for that. It's right there in front of...   Mar 22 2013, 20:09
- - eahm   nu774, your news page has the changelog for fdkaac...   Sep 7 2013, 02:59
|- - nu774   QUOTE (eahm @ Sep 7 2013, 10:59) nu774, y...   Sep 7 2013, 03:33
- - eahm   fdkaac_autobuild.zip from https://sites.google.com...   Oct 19 2013, 22:02
- - IgorC   Does ffmpeg support decoding of low delay SBR? ht...   Oct 25 2013, 00:30
- - eahm   I can't get the .exe with fdkaac_autobuild.zip...   Oct 30 2013, 23:32
- - sluggy   QUOTE (eahm @ Oct 30 2013, 22:32) I can...   Oct 30 2013, 23:39
2 Pages V   1 2 >


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 18th December 2014 - 21:27