Replacing the audio tracks of an MPEG 1 video file.

[RSTLNE]

Hi. I`m new at this, so bear with me please! I have several downloaded music videos that have old, worn-out audio tracks, but the video portion is fine. I`ve discovered how to take the audio off a CD, stretch or shrink it using cool-edit pro, and combine the new audio with the MPEG using Virtual Dub. Here is my problem: The resulting AVI file looks and sounds great when watching it as a small picture, but has thin white bars rolling through it when watching it in full screen mode, like it`s at the wrong scan rate or something. Also when I convert this new AVI back to MPEG, the video is not nearly as good as the original, and it periodically freezes for a split second throughout the song. What I would like to do is replace the audio tracks and leave the video alone,without having to convert it to AVI to do so. Any way to do that? If not, how do you keep from losing quality during the conversion MPEG>AVI>MPEG. Thank you. Steve P.

[Vejita-sama]

Sure you can do this.

1) Get new audio matched up correctly (assume is wav)
2) Use tooLame to encode audio to MP2 (see faq, can either use TMPGenc as a GUI for tooLame or use TMPGenc's native encoder)
3) Under TMPGenc choose 'File | MPEG tools' then choose 'simple de-mux'
4) De-mux your MPEG. This will create two files: m1v (video only) and mp2/mpa (audio only).
5) Re-mux m1v w/ your new audio track -> MPEG. You can mux w/ TMPGenc, but I recommend bbMPEG (see 'Edit' section to left)

You're not re-encoding the MPEG so no quaility lost, and it'll be MUCH faster