wrote:
I just managed to disable automatic playing of DVDs on my XP laptop. Now
I can see the actual files. The larges ones are .VOB, so I know those
are the actual videos. There are also some .IFO files, clicking on them
brings up the menu. There are also some .BUP files. clicking on them
gets an error (cant recognise file type). So I dont know what they do.

Anyhow, I am wondering what the difference is between these .VOB video
files and a MP4 video? It does appear the .VOB files are larger, at
least for the length of video, but I dont have the same video in both
formats to know this for sure.

Anyhow, I'm just curious.

I do wonder if there is a means to convert them to MP4, but maybe that
is not wise. I can only assume that the .VOB is a better quality video,
just because the files are larger.


A DVD-video can use MPEG2.

https://en.wikibooks.org/wiki/Inside...eo/MPEG_Format

MP4 is a different standard.

https://en.wikipedia.org/wiki/MPEG-4_Part_14

Then look for some sort of comparison article.

https://www.winxdvd.com/answers/mpeg2-vs-mpeg4.htm

"MPEG-4 which was created in 1998 was mainly developed
with the aim of achieving higher compression, lower
bandwidth while providing superior audio and image
quality compared to the earlier MPEG-2 format. In brief,
its goal is to gain better picture and audio quality
with smaller file size."

Transcoding existing movies, is different than starting
with a pristine uncompressed source and then making
comparison movies in MPEG2 and MP4.

If you were thinking that MP4 is going to take a 320x240
movie you shot with a webcam and make sharp 1920x1080 60p
movie from it, forget it :-) With video, it's garbage-in,
garbage-out. The better the materials you start with,
the more room for tweaks and improvements.

Paul