[FFmpeg-devel] [PATCH] doc/encoders: Add libvo-aacenc doc

Hendrik Leppkes h.leppkes at gmail.com
Sat Jun 8 20:07:40 CEST 2013

On Sat, Jun 8, 2013 at 7:07 PM, Lou Logan <lou at lrcd.com> wrote:
> On Fri, Jun 7, 2013, at 06:54 PM, Timothy Gu wrote:
>> +It is considered to be worse than the
>> +native experimental FFmpeg AAC encoder.
> Has this been confirmed by you? I've seen this comparison:
> http://d.hatena.ne.jp/kamedo2/20120729/1343545890
> I don't doubt the results, but has anyone here actually performed blind
> ABX tests on these two encoders and confirmed this notion (not that I
> have)?

You don't need to do ABX testing, i have some samples encoded with
libvo-aacenc that have very obvious distortions, but sound fine with
the experimental encoder.
It may be something about the specific audio in that sample that it
doesn't do well with, but its just so obvious.

In fact, here it is:
libvo-aacenc: https://dl.dropbox.com/u/59011278/MC.mp4
experimental: https://dl.dropbox.com/u/59011278/ffmpeg%20aac.mp4

Its most obvious with increased volume. The background "chirping" in
the original audio gets completely distored.

- Hendrik

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