Weird metallic sound

[bimmu]

I'm trying to convert a divx of Futurama into a VCD. What I did was I took the avi and ripped the sound out into a wav with Virtual dub, then I converted that wav into an mp2 using BeSweet. I then used TMPGEnc Plus 2.5 to make a vcd mpeg. When I burnt it on a CD and popped it into my dvd player, the audio had a weird metallic/staticy sound in the background. I've tried reripping the audio and it still has the same effect.

I checked the original avi, the wav and the mp2 that I made and the audio was fine on them all, only when I combined it to make a VCD or SVCD did I have problems. I thought maybe it was a framerate thing, so I tried using the PAL option and the NTSC option on TMPGEnc and still the same problem. (BTW, it's a PAL avi, since the file info from Virtual Dub said it was 25 fps).

I've done this like 100 times with other things and I've never had a problem before.f

[j1d10t]

What are your settings in BeSweet? Bitrate for the mp2, etc... Even though it sounds OK on your computer, it can still sound like crap on your TV. Give us some more info and we'll try to help

[bimmu]

I usually just leave it at default profile, since I don't know enough about BeSweet to mess with the settings.

Oh yeah, also, when I load it into Virtual Dub, if I try to switch it to full audio processing, with a 41000Hz conversion and no compression, I get this message "No audio decompressor could be found to decompress the source audio format", so instead of doing the audio processing step, I just open the file and straight away save it as a wav, then I use BeSweet. I've had that No Audio decompressor message before, but I always then just saved as a wav without audio processing, and never had a problem before.

[lordsmurf]

This is a flaw of MP2 audio.
I've heard it too.

Usually on the tuner from my LiteOn recorder off a certain station. But when I convert to WAV, it's gone. I use SoundForge to re-save as MP2, and it's gone.

It's simply poor MP2 encoding. Do not let Besweet or TMPGENC encode MP2 audio if at all avoidable.

[Cobra]

ffmpegGUI can do it quite nicely. I've never heard anything "metallic" in the few MP2s I made with it.

[bimmu]

Sigh...I tried using sound Forge, but there was an error while trying to open a codec and that other one, ffmpegGUI says it finished, but when I tried to play the mp2, nothing came out. Maybe it's Virtual dub, is there another program that can rip a wav off an avi file?

[Nelson37]

Have you setup TooLame and ssrc as external tools in TmpGenc? Sounds like it might be a frequency conversion problem. Did you make the MP2 at 41k? If so, TmpGenc will be resampling and re-encoding to 44k VCD standard. The point here is that the MP2 you fed to TmpGenc may not be the MP2 you ended up with. Did you play the final VCD file on the PC, either on the HD or on the disk?

[j1d10t]

You can try using TMPGEnc to rip the .wav file out of the .avi file; open TMPGEnc, cancel the "wizard", open the .avi file, the click the File menu, then click Output To File, and choose "WAVE File". But it sounds like it's probably a bad re-sampling during encoding. You might want to resample it using something like GoldWave, or SoundForge, then save that .wav file, then encode it to .mp2 using BeSweet, or whatever .mp2 encoder you normally use.

[Dpick]

Nelson37 comments were great, I never heard of SSRC before, but after using it , I'm very happy I know about it now.

The way I convert audio to DVD compliance is with Virtual Dub MPEG2 , Audacity , and TMPGENC.

I use Virtual Dub to save the audio to wav, I than use Audacity to edit the wav file if its really poor quality and then I use TMPGENC Plus to encode the audio to DVD compliance with Toolame and SSRC as external tools.

I had problems with a metallic sound in my captured audio for years, now with these two external tools in TMPGENC, my problems have been solved.

Thank you.
http://fcchandler.home.comcast.net/stable/index.html