native AAC encoder - VBR quality

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native AAC encoder - VBR quality

Bernhard Döbler
Hi,

you recently improved the quality of the AAC encoder and recomended to
use the native FFMPEG AAC encoder over the external encoders like
libfdk_aac or libfaac.

Regarding the quality of the encoder using Variable Bitrate the wiki
still states: "This VBR is experimental and likely to get even worse
results than the CBR." (https://trac.ffmpeg.org/wiki/Encode/AAC)

What does this mean? Has the quality of the VBR encoder not improved
with the recent changes?


Best,
Bernhard Döbler
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Re: native AAC encoder - VBR quality

Bernhard Döbler
Am 20.12.2015 um 00:27 schrieb Bernhard Döbler:

> What does this mean? Has the quality of the VBR encoder not improved
> with the recent changes?

This was the commit that removed the experimental flag from the aac
encoder:
http://git.videolan.org/gitweb.cgi/ffmpeg.git/?p=ffmpeg.git;a=commit;h=d9791a8656b5580756d5b7ecc315057e8cd4255e

It now seems to me it's not included in the master branch / tag 2.8.4.
What about it?

git tag --contains d9791a865
returns nothing.


Best,
Bernhard
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Re: native AAC encoder - VBR quality

Carl Eugen Hoyos
Bernhard Döbler <programmer <at> bardware.de> writes:

> This was the commit that removed the experimental flag
> from the aac encoder:

> It now seems to me it's not included in the master
> branch / tag 2.8.4.

This sentence makes no sense.

FFmpeg 2.8 was released around September 5th, the
improvements you mentioned were committed much
later (to master).

Carl Eugen
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Re: native AAC encoder - VBR quality

Bernhard Döbler
Am 20.12.2015 um 21:39 schrieb Carl Eugen Hoyos:
> Bernhard Döbler <programmer <at> bardware.de> writes:
>
>> It now seems to me it's not included in the master
>> branch / tag 2.8.4.
>
> FFmpeg 2.8 was released around September 5th, the
> improvements you mentioned were committed much
> later (to master).

As you keep tagging point release of the 2.8 branch and the encoder
itself has been around already I thought the improvements might make it
into the recent versions.


Best,
Bernhard


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Leo
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Re: native AAC encoder - VBR quality

Leo
Hi,

Is this present in latest version 3.1.2?

I remember reading an official blog on this which mentions order of quality. I somehow am not able to see it now. Can someone share link pls?

Thanks,
Leo
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Re: native AAC encoder - VBR quality

Moritz Barsnick
On Wed, Aug 10, 2016 at 21:11:47 -0700, Leo wrote:
> Is this present in latest version 3.1.2?

Yes, the non-experimental native aac encoder has been integrated with
releases as of ffmpeg 3.0. As far as I can tell, 3.1.2 and current git
master HEAD are even identical with regards to the native aac encoder.

> I remember reading an official blog on this which mentions order of quality.
> I somehow am not able to see it now. Can someone share link pls?

Do you mean this?
https://ffmpeg.org/#aac_encoder_stable

Moritz
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