2hr 15 min record on one DVD?

[brucefl]

I got the dvd transferred onto the computer. When I record one, never really been able to get more than 45-50 mins on a dvd, am I doing somthing wrong?
When I trasferred it says it was recorded at 9000kbs. I am pretty sure when I record it over to another dvd I won't be able to get it all on one, unless I reduce the kbs?
Reason for not just copying is, a part needs to be cut out of the present dvd? Am I missing something on compressing it to the dvd?
Is there some special dvd's used to do this? He has a label over, all I know it is memorex.
I want to try to maintain quaility, while putting it on one disc?
thanks Bruce

[Black Lab]

HERE is a handy bitrate calculator. By plugging in 2 hours and 15 minutes you will see that the bitrate needs to be 4,288 kb/s (including audio at 224 kb/s) for a 4.37 GB disc. So it can be done, but it will result in quality akin to VHS.

[DVDDoug]

Is there some special dvd's used to do this? He has a label over, all I know it is memorex.

It could be a dual-layer DVD. Most commercial DVDs are dual-layer. Homemade (burned) dual-layer discs can be "difficult"... Some stand-alone players have trouble playing them.

[brucefl]

I will try to edit it as much as possible , though didn't really want to watch 2.15 of video lol
I noticed changing the sound bit rate doesn't make much of difference.
thanks

[Ken Berry]

The basic equation is: the higher the bitrate, the higher the quality. There are all sorts of other factors involved in final quality, but that is the basic rule. So a video using 9000 kbps is, all other things being equal, a very high quality one.

But the downside of the same equation is: the higher the bitrate, the less you can fit on a DVD. Normally, you can fit around 1 hour of high quality video on a single layer DVD using a bitrate of 8000 kbps, or around 10 minutes more if you use a highly compressed (but still high quality) audio format like Dolby or mpeg layer 2. That being said, I suspect that DVDDoug is probably right and that your original DVD is dual layer.

So if you use the original video quality, edit out the bit you don't want, and want to burn it at much the same quality, then you would have to use a dual layer DVD.

You will NOT be able to preserve the quality if you burn to a single layer DVD. Two hours of video burned at the sort of bitrate given by Black Lab (i.e. 4000 - 4500 kbps) will at best be only average quality.

Changing the sound bitrate will not make much difference because at best, it is only measured in a few hundred kbps. A good quality Dolby audio, for example, might only use around 196 kbps.