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Sampling rate of HE-AAC (.m4a) is shown in half #2

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k-takata opened this issue Nov 23, 2012 · 2 comments
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Sampling rate of HE-AAC (.m4a) is shown in half #2

k-takata opened this issue Nov 23, 2012 · 2 comments

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@k-takata
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see: http://win32lab.com/bbs2/index.cgi?no=10451&reno=10448&oya=10448&mode=msgview

@k-takata
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k-takata commented May 2, 2017

The link is 404 now.

https://web-beta.archive.org/web/20130501205958/http://win32lab.com/bbs2/index.cgi?no=10451&reno=10448&oya=10448&mode=msgview

ところで、HE-AACなm4aのファイルのサンプリングレートが半分に
44.1kHZの場合22050 Hz、48kHzの場合24000 Hz表示されます。
たぶん、これはこれで正しいのでしょうが、拡張データであるSBR部分を考慮した表示にならないでしょうか。

Nero AAC codec / 1.5.4.0で作成したm4aのファイル
mp3infp/u v2.54j2では、
MPEG-4 AAC HE, 213.066 secs, 110 kbps, 22050 Hz

真空波動研では、
AAC 44.10kHz 2.0ch(2/0 L+R) HE(SBR+PS) 109.76kb/s
[Extra][2]
MP4 v2
MetaData / Chapter(1)
[MPEG4] 00:03:33.066 (213.066sec) / 2,944,513Bytes
真空波動研Lite 121014 / DLL 121014 Unicode

@k-takata
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I hope this is fixed with v2.55 beta3.
I'm not sure whether this is a correct fix, though.

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