Low sound levels in MPeg.

[slimmx]

A lot of times when I convert an avi file to MPEG2 the sound levels are very low and often I have to turn on the sound on tv to max. I use GoldWave to rip audio from avi and then convert in Tmpgenc. Is there anyway to boost the sound level. Thanks.

[dafreak]

i would suggest that you use virtualdub to convert the audio to 48000 sample rate for dvd, 44100 for vcd if it isn't already. demux the audio as wav or ac3 and then convert the file using ffemggui at a bitrate of 192 or higher.

then mux the audio and video streams together.

[wulf109]

TMPEG's template-settings-audio. This allows you to raise the audio level(normalize)

[au7usa]

Yes, and a related question;

The MP3Gain site claims that sofware MP3 players tend to clip audio that is over 89.9%, and since then i've used TMPGEnc with this setting when making VCD's.

Do DVD players (hardware) have the same drawback, or should i normalize to 100%?

[slimmx]

I think I misundestood that feature in TMPgenc. I am right now making an MPEG2 file and I normalized it at 120 I think. I thought the more the louder. It's not so is it?

[au7usa]

Supposedly the term "Normalization" refers to the entire range thats available. When you amplify, you make louder.

When you Normalize, you look at the lowest low, and the highest high, and then set them as 0 and 100 respectively.

Everything past 100 will get clipped by the decoder. I think 89.9% was meant to accomidate the sudden peaks in volume that most audio media has. Of course some of us out here still like to listen to dial-tones which never change volume.

I'm also confident that if any of this information is wrong, that the members of this forum will, somehow, overcome their shyness, and Straighten Me Out.

[slimmx]

What would be the best sound to save wave in Goldwave. Right now I do it in PCM signed 16bit stereo. I don't know if it's good enough for DVD.

Also, what should I be doing with normalization? Should I put it to 89.9?

[slimmx]

Also, I converted an avi file to dvd with teh audio settings i mentioned above and for some reason when they speak there is a whisling sound. It is not loud but still annoying. Usually it doesn't happen, what could it be? And the avi does not have whisling on it.

[au7usa]

What are the specs of the source audio? If you encoded from one sample rate and compressed to another it could cause something like that.

MPEG2....can i assume your encoding to 48000Hz? If your source is different you might try to convert to that rate with Goldwave before you feed it into TMPGEnc. I'm not familiar with GoldWave, does it do Sample Rate Conversion?