March 15, 2004! Convert
AC3 audio to WAV with the AC3
Updated May 2, 2003!
Added how to convert video with 5 channels(AC3/Dolby
Digital 5.1 Audio) to WAV.
Tools required: Virtualdub
for MPEG2(SVCD,DVD) video and maybe AC3
ACM Decompresser (if your audio source is AC3).
Read the Problems section if you have
1. Open your video by select File->Open video.
(If a window popups and says that Virtualdub has detected
an improper VBR stream just click OK.)
2. Select File Information.
3. Check if the source has 2 or 5 channels(AC3).
- If the source has 2 channels just continue here below.
- If the source has 5 channels(AC3) then you must install
ACM Decompresser. Close Virtualdub and install it, then
open the video again and continue here below.
1. Select under Audio->Full processing
2. Select Conversion.
3. Set the Sampling rate to 44100Hz (if you are going to make
a DVD later, set it to 48000Hz instead).
(Optional step. Select under Audio->Compression and choose
MP3 if you want to convert to MP3 audio or some other compression.
Remember to install a MP3
Audio Codec like the free Lame Encoder first)
1. Save the wav by clicking on File->Save WAV.
2. Save it to a new wav file.
The wav will be a huge audio uncompressed video file(about
10 MB/minute) if you haven't selected any compression like
If encoding to VCD,SVCD or DVD
then launch your encoder and select the wav as the audio source.
If a window popups and says that Virtualdub has detected
an improper VBR stream just click OK but be sure to save
If you have problems extracting the audio using Virtualdub
try use AVI2WAV
and open the avi and save the audio to wav.
If your video source is MPEG2(SVCD/DVD MPG files) or VOB you
must use the
your source is ASF,SMR you must use Virtualdub
cause newer Virtualdub versions do not support them and the
If you are thinking of converting to mp3 you need MP3
Audio Codec installed.
If the source have AC3 (5 channels) audio you must install
To convert to MP3 audio or any other format select
Audio->Compression and select MPEG Layer 3 or
Lame MP3, you may have to install a MP3