Mp3 to Aac conversion problem

[msaadn]

I have an Mp3 file which I was converting to aac but it gives me an error. Here is the log file.

[Error] Log
-[Information] Versions
--[NoImage] MeGUI Version : 0.3.1.1042
--[NoImage] OS : Windows Vista Ultimate Edition x86 SP2 (6.0.131072.6002)
--[NoImage] Framework used : 2.0 SP1 (2.0.50727.4016)
-[Information] Hardware
--[NoImage] CPU : Intel(R) Core(TM)2 Duo CPU     E4600  @ 2.40GHz
-[Error] Log for job1 (audio, Share The World.mp3 -> Share The World.aac)
--[Information] [6/15/2009 12:03:54 AM] Started handling job
--[Information] [6/15/2009 12:03:54 AM] Preprocessing
--[NoImage] Avisynth script
---[NoImage] NicMPG123Source("C:\Users\mSAADn\Desktop\Share The World.mp3")
---[NoImage] Normalize()
---[NoImage] 32==Audiobits(last)?ConvertAudioTo16bit(last):last
---[NoImage] return last
--[NoImage] Commandline used: - "{0}" --rawpcm {1} {3} {2} --cbr 64000
--[Information] [6/15/2009 12:03:54 AM] Encoding started
--[Information] [6/15/2009 12:03:54 AM] Encode thread started
--[Information] [6/15/2009 12:03:54 AM] Avisynth script environment opened
--[Information] [6/15/2009 12:03:57 AM] Script loaded
--[Information] Output Decoder
---[NoImage] Channels: 2
---[NoImage] Bits per sample: 16
---[NoImage] Sample rate: 11025
--[NoImage] Commandline: C:\Program Files\megui\tools\enc_aacplus\enc_aacplus.exe - "C:\Users\mSAADn\Desktop\Share The World.aac" --rawpcm 11025 2 16 --cbr 64000
--[Information] [6/15/2009 12:03:57 AM] Encoder process started
--[Error] An error occurred
---[NoImage] Exception message: Abnormal encoder termination -4
---[NoImage] Stacktrace:    at MeGUI.AviSynthAudioEncoder.encode()
---[NoImage] Inner exception: null
--[NoImage] Output from encoder via stdout
---[NoImage] ********************************************************************
---[NoImage] * AACPlus v2 Encoder (using Winamp 5.2 enc_aacplus.dll)
---[NoImage] * Source timestamp Mon May 15 17:24:26 2006
---[NoImage] * Build May 15 2006, 17:24:35
---[NoImage] ********************************************************************
---[NoImage] * NOTE!	enc_aacplus.dll must be into executable directory
---[NoImage] *	get it from Winamp 5.2 plugins directory
---[NoImage] *	tested on Winamp 5.2 Release Feb 23 2006 Full (Not Pro) version)
---[NoImage] ********************************************************************
---[NoImage] Input file: -
---[NoImage] Output file: C:\Users\mSAADn\Desktop\Share The World.aac
---[NoImage] SampleRate: 11025
---[NoImage] ChannelCount: 2
---[NoImage] BitsPerSample: 16
---[NoImage] Bitrate: 64000
---[NoImage] ChannelMode: Stereo
---[NoImage] Encoder: aacPlus v2 (HE-AAC+PS)
---[NoImage] Can't create encoder!
--[Information] [6/15/2009 12:03:58 AM] Job completed

I cant seem to figure out the problem. Can anyone help me out?

[Inspector.Gadget]

http://forum.doom9.org/showthread.php?t=118690

[msaadn]

I already have enc_aacplus.dll. This is why I dont understand the problem.

[menno]

You can't encode 11kHz files to HE AAC. The LC AAC core samplerate would be 5.5kHz, which is not supported. If you really want to use HE AAC, upsample to 22kHz first, otherwise just use LC AAC.

[tebasuna51]

Originally Posted by menno

You can't encode 11kHz files to HE AAC. The LC AAC core samplerate would be 5.5kHz, which is not supported. If you really want to use HE AAC, upsample to 22kHz first, otherwise just use LC AAC.

I think is better use LC-AAC than upsample if the original is 11KHz:
- LC is more compatible
- The SBR part in the upsampled HE-AAC 22KHz is artificial

[msaadn]

Well I tried all 3 of them. all of them gave me the same error.

Edit: Ok I got it now. Thankx for your help.

[menno]

Originally Posted by tebasuna51

I think is better use LC-AAC than upsample if the original is 11KHz:
- LC is more compatible
- The SBR part in the upsampled HE-AAC 22KHz is artificial

You can start SBR far below half the Nyquist frequency, so not artificial at all. In fact any encoder will do this, because starting SBR at half Nyquist doesn't bring very much quality gain (and of course if you upsample by 2 before encoding it brings nothing ).

[msaadn]

Thankx for the info menno.

[Masutin]

I hope this is suitable for this topic: Transcoding from MP3 to AAC results in files that play like buzzing noise. What could be the reason?

[hello_hello]

Originally Posted by Masutin

I hope this is suitable for this topic: Transcoding from MP3 to AAC results in files that play like buzzing noise. What could be the reason?

Maybe post a sample of the file you're trying to re-encode as well as some more details on how you're trying to do it.