ripped mp3 audio from avi

[DarkManX4lf]

i ripped the audio from a avi file into mp3, it was a xvid avi. i tried to increase the volume of the mp3 by using goldwave, in goldwave it says that the file is a "System PCM signed 16bit, 48000 Hz, 1536 kbps, stereo" i want to save it this format but it is not letting me do that, it says "file cannot be saved in its original type. Please save using a different type.", but im not sure what type to use, can someone help?

[teegee420]

You'll get that error if you open the avi itself. You have to save as an audio stream. It's not going to mux it with the video for you. Save as mp3 using a bitrate equal or less than the original, then mux with AVI MUX GUI. Make sure you only have the fixed volume stream enabled when you save.

[DarkManX4lf]

ic, well i got a new problem, thx for helping me on the other problem...the new problem is, ihave 3 avi's, two of them are 700mb and the other one is 723mb, all of them are xvid's, when i open the two 700mb ones in virtual dub and strip the sound, they both come out as 57.3mb mp3's which is ok, but when the sound is stripped from the 723mb one, the mp3 file size is 147mb, is there something wrong with the 723mb xvid? im pretty sure that all 3 files are supposed to be the same in quality.

[teegee420]

First of all, why are you stripping the sound from your avi's? Is it just for the volume levels being too low?

Open one of the avi's with the 57.3mb mp3 with Virtualdub and go to File>File Information. Pay attention to the audio bitrate or data rate(whichever it's called). Then open the larger avi and you should see that there is a higher data rate for that one. Higher bitrate equals larger file size. It could be that the larger avi is simply longer in length too.