Problematic sample for Nero6 AAC

2003-08-22 16:38:45

These are the first 15 seconds of "In your Eyes" by Peter Gabriel

I was trying the aac encoder in nero 6.0.0.11 at normal - high quality, encoder quality high, lc profile.

The bitrate of the mp4 is about 125 kbps.

At the second 2 there are many easily discernible artifacts in the cymbals (sound is watery).

I did a fast abx, here are the results:

Code: [Select]

WinABX v0.4 test report
08/22/2003 17:20:34

A file: E:\tmp\in_your_eyes.wav
B file: E:\tmp\in_your_eyes_nero6.wav

17:21:42    1/1  p=50.0%
17:21:59    2/2  p=25.0%
17:22:16    3/3  p=12.5%
17:22:24    4/4  p=6.2%
17:22:37    5/5  p=3.1%
17:22:54    6/6  p=1.6%
17:23:19    7/7  p=0.8%
17:23:37    8/8  p=0.4%
17:24:33    9/9  p=0.2%
17:24:53  10/10  p< 0.1%
17:25:16  11/11  p< 0.1%
17:25:24  12/12  p< 0.1%
17:26:50  13/13  p< 0.1%
17:27:04  14/14  p< 0.1%
17:27:18  15/15  p< 0.1%

I've tried, as a quick (and thus not 100% accurate) comparison, also qt6 at 128 cbr (not abxed yet), but doesn't have this problem.

Can someone confirm?

Thanks & bye

Problematic sample for Nero6 AAC

Reply #1 – 2003-08-22 17:07:04

Thanks

Yeah, bit rate is unusually low (121 kbps here) for the clip - I will investigate this sample.

Problematic sample for Nero6 AAC

Reply #2 – 2003-08-23 14:24:04

I did some further testing.
At "extreme" preset problem seems to be gone, i can't abx.

Tried also aacenc 2.15 (i'm curious ): at -normal preset there are the same artifacts, stronger.

Hope it helps

Bye

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