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Atlantis

Aug 22 2003, 09:38

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

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

Ivan Dimkovic

Aug 22 2003, 10:07

Thanks

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

Atlantis

Aug 23 2003, 07:24

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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