Strange AVI Problem

[HacktheHacker]

My son's friend brought round some movies he had converted to avi and burned to a dvd-r disk. There was supposed to be 5 movies on this disk. When they put the disk in the dvd player (philips) it only showed movie #5, nothing else and it played ok. They mentioned this to me so I tried it in our second dvd player, a different Philips model and it showed movies #1 - 4. I tried it in my computer and it showed movies #1 - 4. I tried it in my wife's older computer and it only showed movie #5. Everything that could be seen played ok on both the dvd players and the computer.
According to my son's friend everything was converted the same (of course I doubt that).
Anyone have any ideas why this would happen? I have no idea what was used to convert these movies, I am just intrigued as to why this would happen, especially when the computers showed different movies.

[Baldrick]

Sounds like a multisession DVD. Copy all movies from the DVDR (you can try isobuster if you can't get all sessions) and make a new DVDr with no multisession.

[HacktheHacker]

Thanks Baldrick, you were right. I checked the dvd in iso buster and it showed two sessions. Why would different dvd players and computers show different sessions? I could understand if they all showed the same session as they probably defaulted to that one session.

[Krispy Kritter]

It varies by hardware. Typically, standalone hardware can only read the last session that was burned. PC's on the other hand, should be able to read the whole disc but results can vary depending on the software used to read the disc.