How to improve audioquality on SVCD...

[MrZoltan]

After reading a few guides on this site I managed to create a few SVCD's successfully. The quality of the video looks great on my stand-alone DVD-player, but Ihave to say that the audio could be a little better.

I use goldwave to extract the audio from the avi and I use TMPGEnc to encode the videoand audio with the tooLame plug-in.

Is there anyway to improve audio quality,

Thanks.

[reboot]

Once you've extracted your audio, run it through Galaxy or Audacity, whatever, and apply some filters. Normalize and Low-pass are what I usually use (experimenting a LOT lately). Low pass at about 10.5 to get rid of hiss, and normalize about -25db to "quiet" things down if they're getting loudly fuzzy.

[MrZoltan]

Well, I think the problem is not there, bu at the point where tooLame converts it actually. So isn't there a better encoder or something because when the audio is extracted to wave it sstill ounds perfect.

[reboot]

I have to ask, why are you separating audio from video with Goldwave?
Why are you using TooLame to re-encode?
Why not let TMPGEnc encode it, all in one step?

[RabidDog]

"extract the audio from the avi " .. what you are doing is to use tmpgenc to encode the audio and that is the wrong choice. encode the audio seperately using any 1000's of audio encoders and then mutliplex the sound and audio together using tmpgenc or another multiplexer.. to keep the best quality dont change the bitrate eg keep 128k mp3 @ 128k mp2 or ac3 . Also dont decode to wav just go mp3-mp2 or mp3-ac3 using besweet.

[Cannonball888]

^Best advice. Letting TmpgEnc encode the sound is the wrong choice. The sound frankly sucks. Don't re-encode the sound if it's not needed, but if you must then use BeSweet to encode the sound separately, and then multiplex with video in TmpgEnc.

[MrZoltan]

Thanks for all the feedback guys.
unfortunately, I have no success with besweet.

I downloaded the program along with the GUI. When I use the AVI for input and MP2 as output ( by selecting mp2_for_svcd ) profile and push the "AVI2MP3" button the log pops up telling me that the AVI-file is wrong format.

Then I tried extracting a WAV first with GoldWave and then convert it to mp2. This was the result:



BeSweet v1.4 by DSPguru.
--------------------------
Using MP2enc.dll v1.129 (23/5/2002), Engine 1.129 <http://www.cdex.n3.net>.

Logging start : 02/10/04 , 19:50:37.
[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : *******
[00:00:00:000] | Output: *******
[00:00:00:000] | Floating-Point Process: Yes
Error 47: Error with LAME dll!
Quiting...
[00:00:00:000] Conversion Completed !
Logging ends : 02/10/04 , 19:50:37.



Since I don;t have any experience with besweet I was wondering if someone could help me with this.

Thanks.

[Zal42]

to keep the best quality dont change the bitrate eg keep 128k mp3 @ 128k mp2 or ac3 .

If you want the result to be VCD and not XVCD, then you might need to change the bitrate and sampling rate. VCDs must have an audio bitrate of 224 k/sec sampled at 44,100.

[Added comment: Oh, for some reason I thought you were talking about VCDs, not SVCDs. Sorry, my mistake -- although the 44,100 part still applies...]