Resample / Convert DivX audio from 11KHz to 48Khz problem

[sfx70]

Hi there
I got some old DivX movies and they have 11Khz mono audio track.
I'm trying to convert the audio to 48Khz using Virtual Dub with LAME mp3 encoder or Radium Fraunhofer mp3 encoder.

The problem is that after conversion I get audio with bad quality with ringing problems as well.

How can I convert DivX audio from lower sampling rates to 48Khz without any quality loss.

Thanks

[muskgrave]

umm..
at 11khz the quality has set sail long ago...

your best bet would be to get quality by either buying the dvd or the vhs tape and capturing it.

[bugster]

If you are keeping these as divx files, then there is no point resampling. As muskgrave said, the quality is already gone.
If you are converting to DVD, then try goldwave and export to (save as) uncompressed PCM wav files. Then use these wav files as the audio source when you encode to mpeg-2.

[sfx70]

The reason I HAVE TO convert these to 48 is my DivX/DVD player won't play DivX with audio less than 44Khz.

I need to convert so I can see the video. The problem is that when I covert to 48Khz, I get this trebbly ringing effect on top which sounds like crap...

I need to find a way to convert without the ringing..

[bugster]

So try Goldwave as I suggested.

[mats.hogberg]

...or use ssrc

/Mats

[sfx70]

We're talking DivX audio here meaning MP3 encoding at 11Khz, not WAVE.
Does Goldwave import mp3 and covert with mp3 at 48Khz

How do I MULTIPLEX the audio and the video back again in DivX.
Remeber this is NOT mpeg-2 or DVD or VCD or SVCD...
thanks

[mats.hogberg]

We're talking DivX audio here meaning MP3 encoding at 11Khz, not WAVE.
Does Goldwave import mp3 and covert with mp3 at 48Khz
How do I MULTIPLEX the audio and the video back again in DivX.
Remeber this is NOT mpeg-2 or DVD or VCD or SVCD...
thanks

Yes, I fully understand. I also understand that as MP3, you can't do a thing with your audio as MP3, except listen to it. And no, the mp3 isn't encoded at 11 kHz, the wav encoded as mp3 is sampled at 11 kHz.

What you have to do, is extract the mp3 audio using VirtualDub direct stream copy.
Load it in GoldWave and upsample to 48 kHz (or whatever) and save wav, or decode mp3 to wav, upsample with ssrc.
Load original AVI in VirtualDub, select WAV audio and select your upsampled wav. Set video to direct stream copy, audio to desired compression (mp3 128 kbps?) and Save AVI.

/Mats

[bugster]

We're talking DivX audio here meaning MP3 encoding at 11Khz, not WAVE.
Does Goldwave import mp3 and covert with mp3 at 48Khz
How do I MULTIPLEX the audio and the video back again in DivX.
Remeber this is NOT mpeg-2 or DVD or VCD or SVCD...
thanks

Yes, I fully understand. I also understand that as MP3, you can't do a thing with your audio as MP3, except listen to it. And no, the mp3 isn't encoded at 11 kHz, the wav encoded as mp3 is sampled at 11 kHz.

What you have to do, is extract the mp3 audio using VirtualDub direct stream copy.
Load it in GoldWave and upsample to 48 kHz (or whatever) and save wav, or decode mp3 to wav, upsample with ssrc.
Load original AVI in VirtualDub, select WAV audio and select your upsampled wav. Set video to direct stream copy, audio to desired compression (mp3 128 kbps?) and Save AVI.

/Mats

Agree with Mats method except the 1st bit. Goldwave will open your divx avi file directly, no need to use virtualdub to extract the audio 1st.

[mats.hogberg]

Goldwave will open your divx avi file directly, no need to use virtualdub to extract the audio 1st.

Quite true. Keep forgetting that, even if I use that method frequently!

/Mats

[sfx70]

I got a similar solution before I even looked at the posts which I thank all of you for.
I use Sound Forge import the DivX, upsample and then save as MP3.
Use VirtualDubMod to add the Mp3 as a stream (delete the original audio stream) and save as Direct Copy for Video.
Finally.. phew..