Well, just a short introduction: I capture mpeg-2-videos from open dvb-streams (coming in via Astra-satelite) to my harddisc and convert them to S-VCD. Normally everything works fine with the following steps:

1. capturing with multidec (one of the best software for this)
2. creating .d2v and Audio (mpa) files with MPG2AVI
3. converting Audio to 44.1KHz with WinAmp (fast and sound is ok) and vdub for Samplerate conversion and audio-offset-correction.
4. new coding with TMPGENC

Until now, I had no problem with that, video- and audio-quality is everytime quite fine. But yesterday I had a strange experience: The sound abruptly changed directly before the movie began to "mickey-mouse". I guess (don't know exactly) that the bitrate of the audiochannel changed with the beginning of the movie.

solution: I cut the original video with MPG2AVI (setting in and out point) and then saving the project. Now everything works fine.

Question: Does anyone know an Audio-Tool, that detects the bitrate-change in a single stream and does output the correct audio? would make things easier.