Audio Encoding Help needed for VirualDub

[Qasim]

I have Lame mp3 + MPEG Layer-3 audio codecs installed. Using Virtual Dub I want to encode audio with the following setting.

20kbps with sample rate of 32khz.

But I dont find this option. I even tried "Show all formats" but no use.
How do I do custom setting of audio encoding in virtualDub

[Gavino]

To use with VirtualDub, you need ACM audio codecs.
Do you have LAME ACM installed?

[Qasim]

Yes. As I mentioned, I have LAME MP3 installed already.

My query is How to encode Audio at 20kbps with sample rate of 32khz in VirtualDub?

[bat999]

Hi
These are the bitrates that lame uses:-

bitrate
================================================== =====================
-b n

For MPEG-1 (sampling frequencies of 32, 44.1 and 48 kHz)
n = 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320

For MPEG-2 (sampling frequencies of 16, 22.05 and 24 kHz)
n = 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160

For MPEG-2.5 (sampling frequencies of 8, 11.025 and 12 kHz)
n = 8, 16, 24, 32, 40, 48, 56, 64

Read about it here:-http://lame.cvs.sourceforge.net/*checkout*/lame/lame/USAGE

[Qasim]

Thanks for the reply, But there is no option of my requirement.

[bat999]

... there is no option of my requirement.

So you can't encode at 20Kbps with sample rate 32KHz using lame.

[Qasim]

yes but I am also not able to encode audio at 32kbps at 32khz

[bat999]

yes but I am also not able to encode audio at 32kbps at 32khz

Hi
When you select the 32Kbps bitrate lame will use an appropriate sample rate.
It's possible to force a 32KHz sample rate when using lame from the command line (--resample 32) but I don't know whether VirtualDub will allow that.

[kpa]

You can force 32Khz sample rate in VDub in Audio>Convert but the lowest bitrate at 32Khz sampling frequency I was able to select for LAME ACM was 48kbs and that was not even stereo but mono.