What is the size relationship between VOBs and MPGs?

[Xesdeeni]

I'm authoring a home-movie DVD. I encoded my 93 minutes of video at about 6Mbps (384Kbps audio). The 14 MPG files total about 4,455,000,000 bytes, which should be well under the 4,700,000,000 bytes on a DVD.

But using DVDit!, when I try to author, it says the DVD will be over 5,000,000,000 bytes. I removed all but one approximately 2,500,000 byte MPG file from the project and DVDit! reported that the total was about 3,900,000 bytes.

Then I added in an approximately 525,000,000 byte file and DVDit! says the project is now over 600,000,000 bytes! The next file I added was also about 524,000,000 bytes, but DVDit! only added about 10,000,000 bytes this time.

What gives? How the heck do I maximize my video quality when there doesn't appear to be any rhyme or reason to the size of the VOB relative to the size of the MPG? Any ideas?

Xesdeeni

[zamzickles]

The process of converting, yes MPG must be converted from the standard MPG format to the VOB structure can change the length of the file size. And as for 4,7xx,xxx,xxx bytes forget it. 4.7 gigabytes is actually far less after formatting. And, once DVDit starts a DVD it will transcode MPGs of differing bit rates to a common bit rate and audio rate producing files of varying length relations.

[Baldrick]

DVDit SE converts all audio to PCM(about 1350kbit/s = 10 MB/min).

Try other authoring tool that does not convert the audio like spruceup,moviefactory,workshop.