Hi all,

I am an avid downloader of concert videos and as I have purchased a DVD writer I have recently started downloading and burning DVDs.

Sometimes a situation occurs in which the video I have downloaded contains crappy audio (what the camera picked up) while I have a much better copy of the audio from the same show, say a soundboard recording. I want to synchronize my audio with the DVD's video.

The important rule is that the video stream must remain untouched - no re-encoding of the video! The menus and chapter structures must not change either. I'm not going to re-author perfectly good DVDs.

I am quite experienced with doing this with other video sources - I have many "redubbed" VCDs of my creation in which I used TMPGenc to multiplex the original video stream with my own audio.

Here are the steps I need to do, assuming I have completed downloading a DVD:

1. Convert the series of VOB files from the downloaded VIDEO_TS folder (they're separated into 1GB chunks) to a single video file that can be handled by video editing software.
2. From my sound source, create a WAV file perfectly synched with the video.
3. Multiplex the new audio, preferable uncompressed (PCM audio) or compressed ac3 with the original video, separating back into 1Gb VOB chunks. These new VOBs should, hopefully, work with the present menu/chapter structure and not require re-authoring of the DVD.

Step 1 I have done: I used a DVD ripping program to concatenate the VOBs and then used Virtualdub-Mpeg2 to temporarily convert the video to a format Vegas has no problem with in real-time (MJPEG) as my PC is rather slow.

Step 2 is also done. Vegas is pretty good with this sort of job. I now have a WAV file nicely synched with the original video (I then delete the temp MJPEG file).

Step 3 I have absolutely no idea about and would greatly appreciate any help with!

I'd also appreciate suggestions on doing step 1 more efficiently as this was a bit of a chore. (With VCDs all I had to do was drag the .DAT file into Vegas and voila. sigh...)

Thanks in advance for any help.

-phozz