Convert AAC file to MP3 file

[nhj]

i just extract an aac file from a mkv file, using the MKVextractGUI, and i'm trying 2 convert it to a mp3 file. can anyone tell me what program to use and how to go obout it.
I read a post by Darkwhisperer 'Merge & Convert AAC files', there's a link about needing an intermediate wav file obtained with the faad2 decoder.
i dl the faad2 decoder, but i'm not sure how to use it. can anyone help me. i'm not really sure what to do. thanks.

[SeeMoreDigital]

Please use the search function as this question has been asked and answered many, many times before!

[nhj]

like i say. i did read read the post.
like in e 'Converting .AAC 5.1 files to anything but .AAC', Tebasuna51 say something about FAAD 2. i dl it, got FAAD 2.exe. but when i double click it, nothing happen. is there a guide on how to use FAAD 2? can anyone point it to me?
Or can anyone just tell me what to do. Thanks. I'm really new at this..:o

[tebasuna51]

You need use faad in Command Line. Then:

1) Extract faad.exe from faad.zip in same folder than your aac file.

2) Make a file in same folder (use Notepad, or other text editor, and name it "faad.bat") with this content (use Copy and Paste):
faad -d -o out.wav YOURNAME.aac
Change YOURNAME with the appropriate name.

3) Double click in faad.bat

[leiming2006]

You can also do it with foobar and lame.

[nhj]

thanks alot.:D

[nhj]

erm... i gt a problem.. i jus reformated my computer.. so everything is gone..
i'm trying to extract an .AAC audio from an .avi file.. so tat i can covert it to .mp3.. using VDM..
when i open e .avi file.. it say tat there's a problem with e bit rate.. (not sure wat it is.) n ask me if i wanna rewrite my header.. i say yes..
then when i try demux e .aac file when it's a direct steam copy. then convert it to .mp3 using faad 2.. e .mp3 file don match e video anymore.. there's a lack in audio.. (e audio is slower than e video)..
then i try to save e .aac file when it's a Full-Processing mode.. there's a error pop-up that say "no audio decompresser found".. so i download e CoreACCds.. e error message still pop-up..
so i'm really at loss now.. wat m i missing??
by e way i did install e Combined Community Codec Pack.. so i tot CCCP included CoreAAC filter..

[Mug Funky]

virtualdub doesn't use directshow, so coreAACds will not make a difference (though it will work in media player or mpc).

the audio plays out of sync in virtualdub because it is trying to seek to a position in the audio that is based on it's bitrate. the bitrate of AAC varies by nature, so virtualdub will be seeking to the wrong places in relation to the video. note that the video should play and seek fine in directshow based players.

so extract the audio out in virtualdubmod, then use foobar or whatever else to do the transcoding. however, you're going to have to read and understand a lot of documentation for this to become a nice fast process - there's tools out there to do all this stuff, but usually they only perform a small part of the process and you're just going to have to find the most efficient way to stitch all the steps together.

also bear in mind that it is not desirable to re-encode an already lossy audio file. lossy-to-lossy will make things sound awful, so if you can figure out a way to keep the audio as AAC then try that first.

[movmasty]

like i say. i did read read the post.
like in e 'Converting .AAC 5.1 files to anything but .AAC', Tebasuna51 say something about FAAD 2. i dl it, got FAAD 2.exe. but when i double click it, nothing happen. is there a guide on how to use FAAD 2? can anyone point it to me?
Or can anyone just tell me what to do. Thanks. I'm really new at this..:o
Ivan & Menno (http://home.wanadoo.nl/%7Ew.speek/speek.htm)

[movmasty]

virtualdub doesn't use directshow, so coreAACds will not make a difference (though it will work in media player or mpc).

the audio plays out of sync in virtualdub because it is trying to seek to a position in the audio that is based on it's bitrate. the bitrate of AAC varies by nature, so virtualdub will be seeking to the wrong places in relation to the video. note that the video should play and seek fine in directshow based players.

so extract the audio out in virtualdubmod, then use foobar or whatever else to do the transcoding. however, you're going to have to read and understand a lot of documentation for this to become a nice fast process - there's tools out there to do all this stuff, but usually they only perform a small part of the process and you're just going to have to find the most efficient way to stitch all the steps together.

also bear in mind that it is not desirable to re-encode an already lossy audio file. lossy-to-lossy will make things sound awful, so if you can figure out a way to keep the audio as AAC then try that first.

But this AAC audio in avis is working well?

[tebasuna51]

i'm trying to extract an .AAC audio from an .avi file.. so tat i can covert it to .mp3.. using VDM..
Really unusual aac in avi, avi don't support aac without any hack, then results can be unexpected.
when i open e .avi file.. it say tat there's a problem with e bit rate.. (not sure wat it is.) n ask me if i wanna rewrite my header.. i say yes..
Never say 'Yes', you need demux the audio stream without changes (also for mp3 VBR streams)
then when i try demux e .aac file when it's a direct steam copy. then convert it to .mp3 using faad 2.. e .mp3 file don match e video anymore.. there's a lack in audio.. (e audio is slower than e video)..
Try now after say 'No' to previous answer.
then i try to save e .aac file when it's a Full-Processing mode.. there's a error pop-up that say "no audio decompresser found".. so i download e CoreACCds.. e error message still pop-up..
so i'm really at loss now.. wat m i missing??
by e way i did install e Combined Community Codec Pack.. so i tot CCCP included CoreAAC filter..
See Mug Funky answer.

[tebasuna51]

But this AAC audio in avis is working well?
Nope, AFAIK standalone players don't support avi with aac audio streams, maybe some players in PC with proper filters can do, but you can use mp4 instead avi for this.

[nhj]

tebasuna51

i click no. when VDM ask me to rewrite my header..
then i demux the audio while it's in direct steam mode to an .aac file.
then i use faad2, the command line at e begining of this post, to covert it to .wav.
e result is still e same.. e audio is slower than e video.. :confused:
did i miss sth out?

[tebasuna51]

e result is still e same.. e audio is slower than e video.. :confused:
did i miss sth out?
Sorry, this work for me with mp3 VBR, I never try with aac.