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Old 16th January 2009, 20:18   #1  |  Link
nautilus7
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NeroAacEnc and delay added during encoding

When encoding AC3 there's a small delay value (~10ms) added to the audio by default. This can be canceled with -pad 0 option in aften.

I wonder if the same happens in AAC encoding and especially with NeroAacEnc, which i use.
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Old 16th January 2009, 21:06   #2  |  Link
madshi
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It's 5.333ms with Aften. About AAC: Why don't you ask in the NeroAacEnc thread?
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Old 16th January 2009, 21:11   #3  |  Link
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Because i thought it's a feature of all encoders, like ac3 encoders.

For me it's 10,66ms in aften. Tebashuna51 also have said that's 5,33ms. Maybe another 5,33ms are added when decoding? I compare original wav and wav -->ac3-->wav and i always find it 10,66ms.
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Old 16th January 2009, 23:22   #4  |  Link
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Quote:
Originally Posted by nautilus7 View Post
Because i thought it's a feature of all encoders, like ac3 encoders.

For me it's 10,66ms in aften. Tebashuna51 also have said that's 5,33ms. Maybe another 5,33ms are added when decoding? I compare original wav and wav -->ac3-->wav and i always find it 10,66ms.
wav (Aften or eac3to) -> ac3 (libav/nicaudio/Azid/...-> wav
always a delay of 5.33 ms

wav (NeroAacEnc) -> m4a (NeroAacDec) -> wav Delay: 0ms

wav (NeroAacEnc) -> mp4 (Yamb) -> aac (eac3to-nero) ->wav Delay: 54.6ms

wav (NeroAacEnc) -> mp4 (Faad/BassAudio) -> wav Delay: 54.6ms
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Last edited by tebasuna51; 16th January 2009 at 23:26.
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Old 16th January 2009, 23:49   #5  |  Link
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Quote:
Originally Posted by tebasuna51 View Post
wav (Aften or eac3to) -> ac3 (libav/nicaudio/Azid/...-> wav
always a delay of 5.33 ms
wav (Aften or eac3to)-> ac3 (nero7/eac3to) -> wav ALWAYS 10,66ms
I'll try with libav as decoder

Quote:
Originally Posted by tebasuna51 View Post
wav (NeroAacEnc) -> m4a (NeroAacDec) -> wav Delay: 0ms
This means that NeroAacEnc doesn't add any delay...

Quote:
Originally Posted by tebasuna51 View Post
wav (NeroAacEnc) -> mp4 (Yamb) -> aac (eac3to-nero) ->wav Delay: 54.6ms
wav (NeroAacEnc) -> mp4 (mkvmerge) -> mka (mkvextract) -> aac (eac3to-nero) ->wav Delay: 33,5ms

It seems to me that nero dshow decoders add some delay.

Last edited by nautilus7; 16th January 2009 at 23:53.
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