How do you transcode a 1.0 AC-3 audio track to MP3

[FulciLives]

Hello :)

Well, the subject of this thread says it all I guess.

How do you transcode a 1.0 AC-3 audio file to a MP3 audio file.

I did a search and it seems that this is for some reason a tricky thing to do but I couldn't find any reasonable or easy-to-follow directions on how to do this.

Any help would be appreciated :)

- John "FulciLives" Coleman

[DSPguru]

do you know how to transcode 5.1 ac3 to mp3 :) ?

[DJ Bobo]

the AZID command will look like this:

azid -c normal -a -d1/0 -oc 1.ac3 1.wav

You'll become a mono wav file.
Now you can encode this using RazorLame to Mono MP3.

[FulciLives]

Hi :D

Thanks for the AZID command line.
I normally use Gordian Knot with the DivX 5.0.2 Codec to make my DivX files.

So can I use the AZID command line as provided by DJ Bobo (thank you) with Gordian Knot or should I do it manually somehow?

If I can do it with Gordian Knot what command line should I use for LAME? I normally use this for LAME:

--alt-preset 192

That's my normal setting since I almost always do my MP3 at 192 rather than the more popular 128.

So is that all I have to do with Gordian Knot or is it more complicated than that?

- John "FulciLives" Coleman

[FulciLives]

Hello :)

OK I used the BeSweet GUI and this is what I used:

Command Line:

"C:\Copy DVD\BeSweetv13\BeSweet.exe" -core( -input "d:\VIDEO_TS\femvamp AC3 T01 1_0ch 224Kbps DELAY -66ms.ac3" -output "d:\VIDEO_TS\femvamp AC3 T01 1_0ch 224Kbps DELAY -66ms.mp3" ) -plugin( -name BS_M2S.dll -func Simple -azid( -n1 -m mono -c normal ) -ota( -d -66 ) -lame( --scale 1 -p --alt-preset 224 )

I'll report here how it turned out.

- John "FulciLives" Coleman

*** THE RESULTS ***
Well, I played back the MP3 file created using the above command line in the BeSweet GUI and it produced a MP3 file that had portions that sounded normal but other portions that were incredibly S-L-O-W ... so it didn't work.

So please ... help!

:D

[DSPguru]

1. you forgot to close the brackets of -plugin() section.
2. :logfile:

[DJ Bobo]

Use azid separately in a DOS window.
Then encode the wav into MP3 with RazorLame (it's a GUI for Lame).
Choose there Mono and an appropriate bitrate (80 or 96kbps will be fine) and encode.

At the end you can mux the mp3 in NanDub with the soundless AVI you become from GKnot.