Help to convert 4 DVD (SL) to 1 DVD (DL)

[Nick Burns]

I have four 1-hour DVDs (complete with menu and chapters) that I'd like to backup to one dual-layer DVD.
I'm not too interested in a fancy menu, but I'd like to maintain the chapter marks from each video and maintain their quality.

What would be the best tools to accomplish this?

Thanks!

[Baldrick]

DVD Shrink in the reauthoring mode.

[jman98]

There is no way to do this without some quality loss. Baldrick's suggestion is probably the easiest way to do it, but again, you can expect some quality loss. Whether you consider it to be small or large quality loss is something you'll have to determine after you do it.

[Nick Burns]

There is no way to do this without some quality loss. Baldrick's suggestion is probably the easiest way to do it, but again, you can expect some quality loss. Whether you consider it to be small or large quality loss is something you'll have to determine after you do it.

This actually surprises me. A dual-layer DVD is 240min (4 Hours).
I'm stumped as to why there would be quality loss?

[lordsmurf]

It's not actually 4 hours, it's about 3.5 at standard "SP mode" usage. (5000-5500kbps 720x480/576)

[Nick Burns]

It's not actually 4 hours, it's about 3.5 at standard "SP mode" usage. (5000-5500kbps 720x480/576)

Ah, understood.
So my best bet would be to convert 2 dvds into one dual layer. That's still acceptable.