A VOB file can contain many audio channels, several different language text subtitles, and the movie. By contrast, most MPEG video files and most AVI files just contain one audio track and one video track. In order for most video editing programs to deal with a VOB file, you must first "demux" it into its various video and audio streams, and then put just one video and one audio stream into Vegas.
Adding to what John wrote, the audio is also often in AC3, which Vegas won't open or edit. Follow the guides at dvdrhelp.com and doom9.org to split the audio & convert it if needed. Consider using dvd2avi & vfapi to get the video into Vegas.
A little confused here. I used DVD Decryptor and the Video was extracted but remained a VOB file which has loaded into Vegas but no audio at all. Do I need to do something else with this 'extracted' VOB file to get the audio as, say, a wav file or with the original VOB on the DVD?
Actually I found an option to demux as well but the resultant file this time is M2V which doesn't load into V4. I tried changing the filetype to mpg but that never worked either.
Actually a quick check has shown that three of the five files created wouild load into V4 although they are all .M2V and around the same length of about 1GB. The ones that loaded still had no audio. What am I doing wrong?
Any clues?
I use the method above to recapture my own created DVD's and it works well for me.
I use two methods to make my DVD's. The first is use my DVD standalone recorder to make the a DVD only for compression purposes. Then I rip the mpg with DVD decrypter, and feed it to DVDarchitect and made the menus.
With this method I save the compression time on vegas.
The second method is teh normal , make the mpg on vegas, and the DVD on DVDA.
Thanks. My silly fault as I didn't realise yoy had to set the option at the bottom right separately for vieo and audio.
The only problem I have now is the AC3 file plays OK in Creative's PlayCentre but I can't rip it from there to wav for example. Using Headac3he I can only change it to AC3-WAV which loads into V4 but contains garbage.